COSMO 2018

27 Aug 2018, 08:00 → 31 Aug 2018, 18:00 Asia/Seoul

Main Hall

Kiwoon Choi (CTPU, IBS)

 

COSMO-18

27th - 31st August  2018

 

IBS Science and Culture Center, Daejeon, Korea

 

The 22nd annual international Conference on Particle Physics and Cosmology (COSMO-18) will be held at the IBS Science and Culture Center in Daejeon. The meeting is hosted by the Center for Theoretical Physics of the Universe(CTPU) in Institute of Basic Science(IBS). The COSMO series is one of the major venues of interaction between cosmologists and particle physicists. Topics to be discussed include:

 

• Large Scale Structure and Cosmological Microwave Background

• Inflation and Early Universe

• Particle astrophysics

• Dark matter and dark energy

• Particle Physics

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Registration at the official homepage

 

  

 

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Poster COSMO18_POSTER-FINAL-WEB_(RGB).jpg

Monday, 27 August

08:50 → 09:00 Openning Remark

Speaker: Dr Doochul Kim (IBS President)

09:00 → 10:30 Plenary Session

Convener: Kiwoon Choi

09:00 Dark Matter from Strong CP: An Alternative View

Spacetime parity provides an important alternative to the Peccei-Quinn solution of the strong CP problem. Furthermore, it provides an understanding of why the Higgs quartic coupling is so small at very high energies. Two theories with parity restoration are discussed, one with precision gauge coupling unification and another with a new dark matter candidate. I discuss signals for a component of dark matter with colored constituents and for trace amounts of fractionally charged stable particles.

Speaker: Dr Lawrence Hall (U. C. Berkeley)

Slides 01._Lawrence_Hall.pdf

09:30 Conversion of dark radiation to photon in early universe and 21cm signal

I discuss a possibility to convert dark radiation to photon in the early universe. In particular, I show that dark radiation consisting of axion-like particles can resonantly convert into photons under the intergalactic magnetic field. Such a conversion process can effectively heat up the Rayleigh-Jeans tail of the CMB, which may explain the anomaly in the 21cm spectrum recently reported by EDGES experiment. I also discuss possibilities of the dark radiation other than axion-like particle.

Speaker: Dr Takeo Moroi (U. of Tokyo)

Slides 02._Takei_Moroi.pdf

10:00 Cosmology and the String Swampland

Speaker: Dr Matthew Reece (Harvard U.)

Slides 03._Matt_Reece.pdf

Video https://youtu.be/yARU72u1WGw

10:30 → 11:00 Coffee Break

11:00 → 12:00 Plenary Session

Convener: Eung Jin Chun

11:00 Unification and "invisible" axion

I discuss the invisible axion arising from GUTs and string compactification. It will also include our recent calculation of the current misalignment angle, which leads to about $10^{-18}\bar{\theta}_1$ where $\bar{\theta}_1$ is the initial misalignment angle at the time $m_a=3H$.

Speaker: Dr Jihn E. Kim (Kyung Hee U.)

Slides 04._KU18.key 04._KU18.pdf

Video https://youtu.be/ShmajCLDKeI?t=2m5s

11:30 Astrophysical and Cosmological Searches for Axions

Axions span a vast parameter space, from axion inflation at the GUT scale, to axion dark energy at the Hubble scale. In between lie the benchmark models of the QCD axion, and “fuzzy dark matter”. Remarkably, vast swathes of this parameter space can be probed. I will review a mixed bag of such constraints and searches, with a focus on cosmology. I will also briefly discuss exciting new ideas in axion direct detection.

Speaker: Dr David Marsh (U. of Goettingen)

Slides 05._marsh_no_animation.pdf

Video https://youtu.be/ShmajCLDKeI?t=29m57s

12:00 → 14:00 Lunch

14:00 → 15:30 Plenary Session

Convener: Jun’ich Yokoyama

14:00 Title: Search for Dark Matter at 250 GeV Lepton Colliders

The search for the (thermal)dark matter is one of important goals at future lepton colliders such as ILC and CEPC. I will discuss what kind of role these lepton colliders play on this search and figure out quantitatively what kind of the dark matter can be efficiently detected there, compared to other dark matter experiments at other collider experiments (e.g. LHC), underground experiments (direct dark matter detections) and astrophysical observations (indirect dark matter detections).

Speaker: Dr Shigeki Matsumoto (U. of Tokyo)

Slides 06._Matsumoto_Mk-II.pdf

Video https://www.youtube.com/watch?v=koIbJDjusEk&t=1s

14:30 The status and prospect for neutrino physics

The study of neutrino properties, especially those pertaining to neutrino masses and mixing, is among the most rapidly developing subjects in fundamental physics. Non-zero neutrino masses are the most palpable evidence of physics beyond the standard model and there are several current and future experiments poised to make new discoveries. I will present the current status of neutrino physics, emphasizing the open phenomenological and theoretical questions.

Speaker: Dr Andre Luiz De Gouvea (Northwestern U.)

Slides 07._COSMO_18_nus.pdf

Video https://youtu.be/koIbJDjusEk?t=30m8s

15:00 Dark Matter and Structure Formation in the Universe

The cosmological model dominated by dark matter and dark energy has proven to be very successful in explaining the structure formation on large scales (>~1Mpc). There are so-called `small-scale problems’ of the Lambda-CDM model, however, many of them can be solved by astrophysical effects of baryons and feedback. I will review some of these issues, and discuss the current efforts in taking the next step in galaxy formation research using cosmological hydrodynamic simulations.

Speaker: Dr Kentaro Nagamine (Osaka U.)

Slides Nagamine_COSMO18.pdf

Video https://youtu.be/koIbJDjusEk?t=1h2m55s

15:30 → 16:00 Coffee Break

16:00 → 17:00 Plenary Session

Convener: Shigeki Matsumoto

16:00 The Current Status and Prospects for Direct Dark Matter Searches

Direct detection experiments seek to detect dark matter though its scattering off nuclei in terrestrial detectors. Over the last decade direct detection dark matter experiments have made remarkable progress in searching for the constituents of the dark matter that makes up ~80% of the matter density of the Universe. Experiments using liquid noble elements are quickly approaching a regime where they will encounter an irreducible neutrino background while solid state device is pushing bounds searching for dark matter candidates of lower masses. In this talk, I will review the motivation for the direct detection of dark matter, discuss a variety of challenges faced by experimenters trying to directly detect dark matter and review recent results from leading direct detection experiments.

Speaker: Dr Jodi Cooley (Southern Methodist U.)

Slides 09._2018_cosmos_cooley.pdf

Video https://youtu.be/sAhERt0-u1I

16:30 Recent PandaX-II results on dark matter search and PandaX-4T upgrade status

PandaX experiment, located at China JinPing underground Laboratory (CJPL), is a 500kg scale liquid xenon dark matter direct detection experiment. With recent data, PandaX-II experiment obtained stringent upper limits on the spin-independent (SI) and spin-dependent (SD) WIMP-nucleon elastic scattering cross sections. Alternative models of dark matter are also explored using this data. Meanwhile, PandaX collaboration has launched an upgrade plan to build PandaX-4T detector with 4-ton liquid xenon in the active volume. The PandaX-4T experiment will be relocated to CJPL-II and is expected to run after 2020. Detailed simulation indicates that the sensitivity on SI WIMP-nucleon scattering cross section could reach 10^{-47} cm^2 after two-year's running.

Speaker: Dr Ning Zhou (Shanghai Jiao Tong U.)

Slides 10._Ning_Zho.pdf

Video https://youtu.be/sAhERt0-u1I?t=34m30s

17:00 → 17:30 Coffee Break

17:30 → 18:30 IBS Session

Convener: Sanghyeon Chang

17:30 Axion dark matter search at IBS/CAPP

Since its prediction, the axion has been considered as the most compelling solution to the strong-CP problem and a leading candidate for cold dark matter. The Center for Axion and Precision Physics Research (CAPP) of the Institute for Basic Science (IBS) in South Korea has completed the construction of the infrastructure for axion dark matter search experiments. Multiple experiments are currently under preparation, with one in data acquisition mode, for parallel operation targeting at different mass ranges. The ultimate goal of our center is to be sensitive to the DFSZ model over a wide range of axion mass. The current approaches to achieve this goal are three folds – commissioning of high field magnets, designing high frequency cavities, and developing low noise (nearly quantum noise limited) amplifiers. We present the status of the experiments and discuss the future prospects.

Speaker: Dr Sung Woo Youn (IBS CAPP)

Slides 11._Cosmo-18_YOUN.pdf 11._Cosmo-18_YOUN.pptx

Video https://www.youtube.com/watch?v=sAhERt0-u1I&t=5378s

17:50 AMoRE: A neutrinoless double beta decay experiment

The AMoRE (Advanced Molybdenum based Rare process Experiment) is looking for neutrinoless double beta decay of Mo-100 in molybdate based crystal scintillators by using a cryogenic technique. The crystals equipped with MMC (Metallic Magnetic Calorimeter) phonon and photon sensors are cooled down to 10~20 mK temperatures to detect both thermal and scintillation signals produced by a particle interaction in the crystal to achieve high energy resolution and efficient particle discrimination. The AMoRE-pilot, an R&D phase, has six 48depl Ca 100 MoO 4 crystals with a total mass of ~1.9 kg in the latest configuration and is running at the 700-m-deep YangYang underground laboratory. After the completion of the AMoRE-pilot run by autumn this year, the AMoRE-I will start with ~5 kg of crystals, mostly 48depl Ca 100 MoO 4 and several R&D crystals such as Li 2 100 MoO 4 and Na 2 100 MoO 7 . The AMoRE-II with 200 kg of molybdate crystals at the new 1,000 m deep underground laboratory (Yemi Lab) to be excavated by 2020 at Handeok iron mine can improve effective Majorana neutrino mass sensitivity down to the level of inverted hierarchy of neutrino mass, 20-50 meV. We have already secured 70 kg of Mo-100 isotope out of 120 kg contracted for the AMoRE-II experiment. Results of the AMoRE-pilot and status of the AMoRE-I and AMoRE-II preparation will be presented.

Speaker: Dr Moo Hyun Lee (IBS CUP)

Slides 12._AMoRE_MHLee_COSMO-18-a.pdf

Video https://www.youtube.com/watch?v=sAhERt0-u1I&t=6750s

18:10 Axionic Electroweak Baryogenesis

An axion can make the electroweak phase transition strongly first-order as required for electroweak baryogenesis even if it is weakly coupled to the Higgs sector. This is essentially because the axion periodicity helps to avoid an instability of the potential regardless of the value of the axion decay constant. Furthermore, the axion can serve as a CP phase relevant to electroweak baryogenesis if one introduces an effective axion coupling to the top quark Yukawa operator. Then, for an axion decay constant between about TeV and order 10 TeV, the observed baryon asymmetry can be explained while avoiding current experimental constraints. It will be possible to probe the axion window for baryogenesis in future lepton colliders and beam-dump experiments.

Speaker: Dr Chang Sub Shin (IBS CTPU)

Slides 13._aEWBG_CSS_COSMO18.pdf 13._aEWBG_CSS_COSMO18.pptx

Video https://www.youtube.com/watch?v=sAhERt0-u1I&t=8055s

18:30 → 20:30 Reception

Tuesday, 28 August

09:00 → 10:30 Plenary Session

09:00 Inflationary Correlators from the Boundary

Speaker: Dr Daniel Baumann (U. of Amsterdam)

Video https://www.youtube.com/watch?v=1wirMTa4eWc&t=79s

09:30 Inflation as a Particle Collider

The conventional way to study high energy particle physics is to build particle colliders. In fact, the nature has already built a “collider” running at unprecedentedly high energy (up to 10^13 GeV): During cosmic inflation, high energy particles (up to the Hubble scale of inflation) are produced and interacts with each other. The relics of the interaction are imprinted in the density fluctuations of our current universe in a unique and model-independent way. By measuring the correlations of these density fluctuations, the particle spectrum and interactions at the energy scale of inflation can be reconstructed. This is known as the cosmological collider physics. In this talk, the cosmological collider physics, and the corresponding signature for the Standard Model are reviewed. We also discuss how the expansion history of the primordial universe can be measured by the same process.

Speaker: Dr Yi Wang (Hong Kong U. of Science and Technology)

Slides YI_Wang_COSMO18.pdf

Video https://www.youtube.com/watch?v=1wirMTa4eWc&t=2238s

10:00 Signatures of particle production during inflation

We will discuss several phenomenological signatures that can result from particle production during inflation, with a particular attentions to models of axion inflation. The signatures include large non-gaussianity and sourced gravitational waves at CMB scales, primordial black holes, and gravitational waves at interferometer scales.

Speaker: Dr Marco Peloso (U. of Minnesota)

Slides Marco_Peloso_cosmo-peloso.key.pdf

Video https://www.youtube.com/watch?v=1wirMTa4eWc&t=4772s

10:30 → 11:00 Coffee Break

11:00 → 12:00 Plenary Session

Convener: Hang Bae Kim

11:00 Non-Gaussian gravitational waves from inflation

It has been widely assumed that detection of primordial gravitational waves from inflation in, for example, B-mode polarisation of the cosmic microwave background, immediately implies discovery of the quantum nature of spacetime. While this statement is true for the vacuum solution, it does not apply if the gravitational waves originate from the matter fields. How can we distinguish between these two origins? The answer is non-Gaussinaity. We show that the gravitational waves from SU(2) gauge fields coupled to a spectator axion field during inflation are highly non-Gaussian with a characteristic shape, whereas those from the vacuum are only weakly non-Gaussian.

Speaker: Dr Eiichiro Komatsu (Max Planck Institute)

Slides cosmo18_komatsu.pdf

Video https://www.youtube.com/watch?v=1wirMTa4eWc&t=7145s

11:30 Light inflaton completing Higgs inflation

We consider the extension of the Standard Model (SM) with a light inflaton where both unitarity problem in Higgs inflation and vacuum instability problem are resolved. The linear non-minimal coupling of the inflaton to gravity leads to a significant kinetic mixing between the inflaton and the graviton such that perturbative unitarity is restored up to Planck scale. We show the correlation between unitarity scale and inflationary observables in this model and discuss how the effective Higgs inflation appears.

Speaker: Dr Hyun Min Lee (Chung-Ang U.)

Slides 04._cosmo2018-hmlee.pdf

Video https://www.youtube.com/watch?v=1wirMTa4eWc&t=9304s

12:00 → 14:00 Lunch

13:00 → 14:00 CUP Open Lab

14:00 → 16:00 Parallel Session: Cosmic Microwave Background

Convener: Kohei Kamada

14:00 BICEP/Keck Array Program: Performance Overview and Future Plans

Speaker: Jae Hwan Kang (Stanford U)

Slides 1._Cosmo18-JaeHwanKang(20180828-submitted).pdf 1._Cosmo18-JaeHwanKang(20180828-submitted).pptx

14:15 Searching for inflationary gravitational waves with the South Pole Telescope

Speaker: Christian Reichardt (U. of Melbourne)

Slides 02._reichardt_20180828_cosmo.pdf

14:30 Cosmic microwave background constraints for global defects

Speaker: Asier Lopez-Eiguren (U. of Helsinki)

Slides 4._lopez-eiguren.pdf

14:45 Axion Landscape and CMB Statistics

Speaker: Spyros Sypsas (U. of Chile)

Slides 05._Sypsas.pdf

15:00 Exploring compensated isocurvature perturbations with CMB spectral distortion anisotropies

Speaker: Keisuke Inomata (U. of Tokyo)

Slides 06._COSMO-18.pdf

15:15 Magnetogenesis from isocurvatures with second order Boltzmann solver

Speaker: Pedro Carrilho (Queen Mary U. of London)

Slides 07._Pedro_Carrilho_COSMO18_small.pdf

15:30 Reconstructing the inflationary landscape with cosmological data

Speaker: Gonzalo Palma (U. of Chile)

Slides 8._Palma_COSMO-18.pdf

14:00 → 16:00 Parallel Session: Dark Matter 1

Convener: Jong-Chul Park

14:00 Composite dark axions and light dark baryons

Speaker: Deog Ki Hong (Pusan National U.)

Slides 1.dkhong_revised.pdf

14:15 Anatomy of RHN-portal Dark Matter

Speaker: Eung Jin Chun (KIAS)

Slides 2._Eung_Jin_Chun.pdf

14:30 Decaying ALPino dark matter as a solution to small scale issues

Speaker: Ayuki Kamada (IBS-CTPU)

Slides 03._kamada0828.pdf

14:45 The Dawn of FIMP Dark Matter

Speaker: Tommi Tenkanen (Queen Mary U. of London)

Slides 4._Tommi_Tenkanen_COSMO18.pdf

15:00 Early Kinetic Decoupling of DM: when the standard way of calculating the thermal relic density fails

Speaker: Andrzej Hryczuk (U. of Oslo)

Slides 5._Hryczuk_COSMO2018.pdf

15:15 Dark matter with low-reheating temperature

Speaker: Ki-Young Choi (Sungkyunkwan U.)

Slides 06_KYChoi.pdf

15:30 Production of Purely Gravitational Dark Matter

Speaker: Kazunori Nakayama (U. of Tokyo)

Slides 07.nakayama.pdf

15:45 Unitarizing SIMP scenario with dark vector resonances

Speaker: Soo-Min Choi (Chung-Ang U.)

Slides 8._Soo-Min_Choi.pdf

14:00 → 16:00 Parallel Session: Gravitaional Wave

Convener: Chang Sub Shin

14:00 SOGRO: Superconducting Tensor Gravitational Wave Detector for Mid-Frequencies

Speaker: Gungwon Kang (KISTI)

Slides 01._COSMO18_GWKang.pdf 01._COSMO18_GWKang.pptx

14:15 Gravitational waves from vacuum first-order phase transitions: from the envelope to the lattice

Speaker: Daniel Cutting (U. of Sussex)

Slides 02.DCuttingCosmo18.pdf 02.DCuttingCosmo18.pptx

14:30 Primordial Gravitational Waves induced by Gauss-Bonnet inflation

Speaker: Gansukh Tumurtushaa (IBS-CTPU)

Slides 03._GansukhT-COSMO18.pdf

14:45 Gravitational wave forest from string axiverse

Speaker: Naoya Kitajima (Nagoya U.)

Slides 04._cosmo18_kitajima.key 04._cosmo18_kitajima.pdf

15:00 Analytic Calculation of Gravitational Wave Spectrum Induced from Primordial Curvature Perturbations

Speaker: Takahiro Terada (KEK)

Slides 05._2ndGW_cosmo18_Terada.key 05._2ndGW_cosmo18_Terada.pdf

15:15 Back-Reaction of Gravitational Waves Revisited

Speaker: Tomo Takahashi (Saga U.)

Slides 06._T_Takahashi.pdf

15:30 Cosmological phase transitions in the Standard Model with hidden scale invariance

Speaker: Cyril Lagger (U. of Sydney)

Slides 07.talk_Cosmo_cyril_lagger.pdf

16:00 → 16:30 Coffee Break

16:30 → 18:30 Parallel Session: Dark Matter 2

Convener: Hyun Min Lee

16:30 Characterizing DM properties with (non)minimal Higgs portal at future colliders

Speaker: Pyungwon Ko (KIAS)

Slides 09.Pyungwon_Ko__DMspin.pdf

16:45 Quantum corrections in a DM model with pseudo-scalar mediator

Speaker: Tomohiro Abe (Nagoya U.)

Slides Tomohiro-Abe_cosmo2018.pdf

17:00 Hunting for Boosted Dark Matter

Speaker: Jong-Chul Park (Chungnam National U.)

Slides 11.Jong-Chul_Park.pdf

17:15 Sterile neutrino DM and the status of 3.5 keV line

Speaker: Alexey Boyarsky (Leiden U.)

17:30 PeV scale supersymmetry and the IceCube neutrino events

Speaker: Mansi Dhuria (Indian Institute of Technology Bombay)

Slides 13._Mansi_Dhuria__COSMO_talk_Mansi.pdf

17:45 Modeling evolution of dark matter substructure and annihilation boost

Speaker: Nagisa Hiroshima (U. of Tokyo)

Slides 14.hiroshima.pdf

18:00 Dark Matter Direct Detection with a Spin-2 mediator

Speaker: Yoo-Jin Kang (Chung-Ang U.)

Slides 7._Yoojin_COSMO18.pdf

16:30 → 18:30 Parallel Session: Large Scale Structure 1

Convener: Cristiano Sabiu

16:30 WFIRST High Latitude Survey and Synergies with Ground-based Surveys

Speaker: Chen Heinrich (Caltech/JPL)

Slides 9.WFIRST-forecast_Cosmo2018.key 9.WFIRST-forecast_Cosmo2018.pdf

16:45 Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam data

Speaker: Chiaki Hikage (Kavli IPMU)

17:00 Cosmological constraints using BAO - From spectroscopic to photometric catalogues

Speaker: Srivatsan Sridhar (KASI)

Slides 11._Cosmo18_SRIVATSAN_Aug2018.pdf

17:15 Scale-dependent trispectrum and cosmological parameter constraints

Speaker: Saroj Adhikari (U. of Michigan, Ann Arbor)

Slides 12._cosmo-18-saroj.pdf

17:30 Cosmology with type Ia supernova gravitational lensing

Speaker: Jacobo Asorey (KASI)

Slides 13._Cosmo2018_parallelLSS1_Asorey.pdf

17:45 Probing features in the Early Universe with the Large-Scale Structures

Speaker: Benjamin L'Huillier (KASI)

Slides 14._benjamin_lowres.pdf

18:00 Constraints on cosmology and baryonic feedback with the Deep Lens Survey using galaxy-galaxy and galaxy-mass power spectra

Speaker: Mijin Yoon (Yonsei U.)

Slides 15._cosmo18_mijin_yoon.pdf

16:30 → 18:30 Parallel Session: Multi Messenger Astrophysics/Early Universe

Convener: Kenji Kadota

16:30 Precision Measurement of Electron and Positron Fluxes In Primary Cosmic Rays with the Alpha Magnetic Spectrometer on the International Space Station.

Speaker: Cheng Zhang (Institute of High Energy Physics, Chinese Academy of Sciences)

Slides 08.20180828_EOSMO_AMS_Positron_CZ.pdf

16:45 EDGES, the complexity of star formation, and no constraining power on Dark Matter Models.

Speaker: Wessel Valkenburg (EPFL, Lausanne)

Slides valkenburg.key valkenburg.pdf

17:00 A Limit on Axion from the Cooling Neutron Star in Cassiopeia A

Speaker: Jiaming Zheng (U. of Tokyo)

Slides 10._CasNS_axion_Cosmo-18.pdf

17:15 The spectrum of the axion dark sector and black hole spin constraints on the number of axion-like fields.

Speaker: Matthew Stott (King's College London)

Slides 11.COSMO_2018_MATTHEW_STOTT.pdf

17:30 Axion Window and Low-Scale Inflation

Speaker: Wen Yin (Institute of High Energy Physics)

Slides 12._WenYinCosmo18.pdf

17:45 Machine learning for bounce calculation

Speaker: Ryusuke Jinno (IBS-CTPU)

Slides 13.Ryuske_Junno_COSMO.pdf

18:00 Topics on primordial black holes from inflation

Speaker: Gabriele Franciolini (U. of Geneva)

Slides 14.Cosmo-G_Franciolini.pdf

18:15 Primordial Black Holes in Matter Dominated Universe

Speaker: Kazunori Kohri (KEK/Oxford U.)

Slides 15.Koihri.pdf

19:00 → 20:00 Public Talk : 뉴턴과 아인슈타인 - 두 우주 이야기

Speaker: Dr Hang Bae Kim (Hanyang U.)

Poster COSMO18_HBKIM_POSTER.jpg

Wednesday, 29 August

09:00 → 10:30 Plenary Session

Convener: Marco Peloso

09:00 Pixels to physics: the promise and challenges of survey cosmology

We are entering a transformative period in observational cosmology. Surveys starting in 2019 promise to solve key problems in cosmology — but only if we develop new approaches for handling the volume and complexity of the data. Extracting robust cosmological information from these surveys is a major challenge that will require development and validation of analysis methods at each step of the chain from raw pixels to cosmology. I will comment on some of the experimental and methodological innovations that are needed to realise the promise of upcoming surveys. I will place particular emphasis on the need for accurate diagnosis of inconsistent results from different combinations of cosmological probes, to ascertain whether such “tensions" indicate the need for new physics.

Speaker: Dr Hiranya Peiris (U. College London)

Slides 01._COSMO18_peiris.pdf

Video https://www.youtube.com/watch?v=eFnmiZiDH6U&t=0s

09:30 21cm cosmology

I'll review the science potential, challenge and recent progresses of observing the redshifted 21cm line in cosmology, and also discuss the Tianlai experiment in China.

Speaker: Dr Xuelei Chen (National Astronomical Observatories, Chinese Academy of Sciences)

Slides 02._Chen_1808Bs.pdf 02._Chen_1808Bs.pptx

Video https://www.youtube.com/watch?v=eFnmiZiDH6U&t=2247s

10:00 Cosmological implications of string theory moduli

Speaker: Dr Fernando Quevedo (International Centre for Theoretical Physics)

Slides 03._Cosmo2018_Quevedo.pdf

Video https://www.youtube.com/watch?v=eFnmiZiDH6U&t=3956s

10:30 → 11:00 Coffee Break

11:00 → 12:00 Plenary Session

Convener: Arman Shafieloo

11:00 Mapping the Dark Universe with Galaxy Surveys

Speaker: Dr Risa Wechsler (Stanford U.)

Video https://www.youtube.com/watch?v=eFnmiZiDH6U&t=7286s

11:30 Measuring the Properties of Dark Energy with Galaxy Surveys

I will summarize the ways in which galaxy surveys test the properties of Dark Energy and the current constraints based on these tests. I will include a particular focus on the use of distance measurements provided by measuring the baryon acoustic oscillation feature in the distribution of galaxies. I will discuss some of the current tensions within the LCDM model and the future measurements that will probe them further.

Speaker: Dr Ashley Ross (Ohio State U.)

Slides 05._AshleyRoss_COSMO18.pdf

Video https://www.youtube.com/watch?v=eFnmiZiDH6U&t=9279s

12:00 → 14:00 Lunch

14:00 → 16:00 Parallel Session: Dark Matter Experiment

Convener: Moo Hyun Lee

14:00 Results from the 1 tonne x year Dark Matter Search with XENON1T

Speaker: Julien Masbou (Subatech - U. of Nantes)

Slides 1._Julien_Masbou__2018_08_29_Cosmo18_XENON1T.pdf

14:15 WIMP-search Results from a Blinded Maximum Likelihood Analysis of CDMSlite Run 3

Speaker: William Page (U. of British Columbia)

Slides 2.William_Page__wpage_COSMO_CDMSlite.pdf

14:30 Status of the COSINE-100 experiment

Speaker: Pushparaj Adhikari (Sejong U./IBS-CUP)

Slides 3._COSINE_100_COSMO_Pushpa.pdf

14:45 Dark Sector Serches with Belle II

Speaker: Zachary Liptak (U. of Hawaii)

Slides 4._Zachary_Liptak_-_Dark_Sector_Searches_at_Belle_II.pdf

15:00 FASER: ForwArd Search ExpeRiment

Speaker: Sebastian Trojanowski (National Centre for Nuclear Research)

Slides 5.Sebastian__Trojanowski_FASER_COSMO18_final.pdf

15:15 Search for heavy dark matter with IceCube

Speaker: Hrvoje Dujmovic (SKKU)

Slides 6.hrvoje_dujmovic_COSMO_DM.pdf

15:30 Phenomenology of dark gauge group at the LHC

Speaker: Myeonghun Park (Seoultech)

Slides 7.PARK_PDF.pdf

14:00 → 16:00 Parallel Session: Inflation 1

Convener: Ryusuke Jinno

14:00 Geometrical destabilization and reheating

Speaker: Krzysztof Turzynski (U. of Warsaw)

Slides 1._Turzynski.pdf

14:15 Assisted Hilltop Inflation

Speaker: Wanil Park (Chonbuk National U)

Slides 2._20180829-cosmo18-wipark-final.pdf

14:30 Floquet analysis of self-resonance in single-field inflationary models

Speaker: Michal Wieczorek (U. of Warsaw)

Slides 3._PresentationCosmo2018MichalWieczorek.pdf

14:45 Higgs inflation at the hilltop

Speaker: Eemeli Tomberg (U. of Helsinki)

Slides 4._hhiggs.pdf

15:00 Extranatural inflation and CMB observations

Speaker: Gaurav Goswami (Ahmedabad U.)

Slides 5._Gaurav-Goswami-Cosmo-2018.pdf

15:15 Inflationary Correlators from Symmetries and Singularities

Speaker: Hayden Lee (Harvard U.)

Slides 6._Hayden_Lee_-_COSMO18.pdf

15:30 Unsuppressed Primordial Standard Clocks in Warm Quasi-Single Field Inflation

Speaker: Siyi Zhou (HKUST)

Slides 7._Warm_InflationV2.pdf

15:45 Angular inflation in α-attractors

Speaker: Evangelos Sfakianakis (U. of Leiden)

Slides 8._Sfakianakis_COSMO_2018.pdf

14:00 → 16:00 Parallel Session: Large Scale Structure 2

Convener: Benjamin L’Huillier

14:00 Soft Theorems in Cosmological Correlation Functions

Speaker: Sam Wong (Columbia U.)

Slides 01._soft_theorem_Sam_Wong.pdf

14:15 Fast Generation of Covariance Matrices for Weak Lensing

Speaker: Raphael Sgier (ETH Zurich)

Slides 02._talk_Cosmo18_Raphael_Sgier.pdf

14:30 Modelling nonlinearities beyond vanilla LCDM

Speaker: Matteo Cataneo (U. of Edinburgh)

Slides 03._Cataneo_COSMO18_29082018.pdf

14:45 Shell-crossing structure of cold dark matter with Lagrangian perturbation theory

Speaker: Shohei Saga (Kyoto U.)

Slides 05._SAGA_Shell-crossing.pdf 05._SAGA_Shell-crossing.pptx

15:00 Machine learning dark matter halo formation

Speaker: Luisa Lucie-Smith (U. College London)

Slides 06._talk_LuisaLucieSmith.key 06._talk_LuisaLucieSmith.pdf

15:15 Cosmological constraints on the velocity-dependent Baryon-Dark matter coupling

Speaker: Junpei Ooba (Nagoya U.)

Slides 07._cosmo18_JO.pdf 07._cosmo18_JO.pptx

16:00 → 16:30 Coffee Break

16:30 → 18:30 Poster Session

16:30 ''Invisible'' QCD axion rolling through the QCD phase transition

Speaker: Sejin Kim (KyungHee U.)

16:30 CMB-S4 Forecast on the Primordial non-Gaussianity Parameter of Feature Models

Speaker: Wuhyun Sohn (U. of Cambridge)

16:30 Detection of Intrinsic Spin Alignments in Isolated Spiral Pairs

Speaker: Hanwool Koo (KASI/UST)

16:30 Einstein Double Equations

Speaker: Jeong-Hyuck Park (Sogang U.)

Poster EDFE-Poster.pdf

16:30 K-evolution (Non-linear evolution of k-essence field)

Speaker: Farbod Hassani (U. of Geneva)

Poster K-evolution_FarbodHassani.pdf

16:30 Leptoquark portals for B-meson anomalies and dark matter

Speaker: Tae Gyu Ro (Chung-Ang U.)

Poster poster_(18.08.27)_-_COSMO.pdf

16:30 Precise peculiar velocities from gravitational waves accompanied by electromagnetic signals and cosmological applications

Speaker: Yuyang Wang (Nanjing U.)

Poster COSMO-18-WANG_YUYANG.pdf

16:30 Probing The Isotropy of Cosmic Acceleration Using Different Supernova Samples

Speaker: Zhiqiang Sun (Nanjing U.)

Poster poster_sunzhiqiang.pdf

16:30 PyCosmo: An Integrated Cosmological Boltzmann Solver

Speaker: Federica Tarsitano (ETH Zurich)

Poster poster_cosmo18_FT.pdf

16:30 Reconstructing properties of WIMP DM

Speaker: Sebastian Trojanowski (National Centre for Nuclear Research)

Poster poster_COSMO2018_reconstructing_WIMP_DM.pdf

16:30 Redshift-space streaming velocity effects on the baryon acoustic oscillation scale

Speaker: Jahmour Givans (Ohio State U.)

16:30 Reexamining Constraints on High-Mass High-Cross Section Dark Matter

Speaker: Matthew Digman (Ohio State U.)

18:30 → 19:00 Korean Music Concert

Korean Traditional Music ensemble TaM will play Korean traditional music with modern flavor.

19:00 → 21:00 Banquet

Thursday, 30 August

09:00 → 10:00 Plenary Session

Convener: Sunghoon Jung

09:00 Optical Follow-up Observation of the Gravitational Wave Source, GW170817

On August 17th 2017, for the first time in the history, the gravitational wave (GW) detectors recorded signals coming from the merger of two neutron stars.  This event was named as GW170817, and more interestingly, gamma-ray emission was detected 2 seconds after the gravitational wave signal, and 11 hours later, telescopes in Chile identified that the GW signal came from the NGC 4993 galaxy at the distance of about 40 Mpc. This is again the first time that electromagnetic (EM) signals are detected for a GW source. The follow-up observations by astronomers all around the world, including our group in Korea, successfully identified the optical emission as the kilonova, the elusive optical/NIR counterpart that has been proposed to originate from a neutron star merger. Yet again, this marks the first time that a kilonova was discovered convincingly. This whole event started the new era of astronomy, so-called the "multi-messenger astronomy", where the combined information from GW and EM radiation reveals an unprecedented view of the universe. In this talk, I summarize this exciting event, and describe the efforts by Korean astronomers that have led to important discoveries about the kilonova and the host galaxy properties, and finally provide the future prospects.

Speaker: Dr Myungshin Im (Seoul National U.)

Slides 01._EMfollowup_mim.pdf 01._EMfollowup_mim.pptx

Video https://youtu.be/bHJN5b_Si1g

09:30 Multi-frequency GW astronomy

Discoveries of binary black holes (BBHs) and binary neutron stars via gravitational waves (GWs) opened a new window to explore the universe. So far the GW astronomy is accessible between about 25 Hz up to 2000 Hz (by LIGO and Virgo detectors on Earth). Compact objects such as neutron stars and black holes with masses around O(1) - O(100) Solar masses are main sources in this frequency range. There are international efforts for GW observations in multi- frequency bands, in particular toward lower frequencies. For example, Pulsar Timing Array aims to detect gravitational waves in nanohertz, targeting supermassive black hole binaries. The success of the LISA Pathfinder mission of ESA (European Space Agency) proved that the technology required to detect GWs around millihertz or below in space is feasible. One of the most important information we can obtain by the multi-frequency GW observation would be the formation and evolution of compact objects in binaries, in particular BBHs, over the cosmic time. The "middle-frequency" range between 0.1-10 Hz have attention recently for the prospects of discovering intermediate-mass black holes. In addition to resolved targets, cosmic GW background calls for a broad-band or multi-frequency observation. In this review talk, I will present highlights of different proposals targeting different frequency bands and their science goals. The “multi-messenger” astronomy, in coordination with particle and electromagnetic-wave observations, will be most powerful when multi-frequency GW observations will be available. I will discuss prospects of multi-frequency, multi-messenger astronomy that would be in reality in decades, focusing on black hole astronomy and cosmology.

Speaker: Dr Chunglee kim (Ewha Womans U.)

Slides 02._ckim-COSMO18.pdf 02._ckim-COSMO18.pptx

10:00 → 10:30 Coffee Break

10:30 → 11:30 Plenary Session

Convener: Ashley Ross

10:30 Gravitational-wave astrophysics

Ground-based gravitational-wave detectors have opened new avenues to explore the universe. The detections of several binary black holes have allowed, for the first time, to access these objects without needs for photons, and to directly measure their masses and spins. The spectacular join detection of gravitational waves and light from the binary neutron star system GW170817 has shown the potential of multi-messenger astrophysics and yielded an independent measurement of the Hubble constant. In this talk, I will focus on what we can expect next, as the detectors approach their design sensitivity. I will also report on the scientific potential of the next-generation of gravitational-wave detectors, which could detect all the binary black holes in the universe.

Speaker: Dr Salvatore Vitale (Massachusetts Institute of Technology)

Slides 03._Presentation_SVitale.pdf 03._Presentation_SVitale.pptx

Video https://youtu.be/8Mb-cG0DNQA

11:00 Some aspects of Dark Energy models

We will present some results about the growth index, a phenomenological tool that can be used for the characterization of the growth of matter perturbations. Partly related to this, we will also consider the behaviour of the effective gravitational coupling in modified gravity dark energy models.

Speaker: Dr David Polarski (Montpellier 2 U.)

Slides 04._COSMO18.pdf

Video https://youtu.be/-UnfBS8upLo

12:00 → 14:00 Lunch

13:00 → 14:00 CUP Open Lab

14:00 → 16:00 Parallel Session: Dark Energy / Modified Gravity 1

Convener: Jacobo Asorey

14:00 Relativistic stars in degenerate higher-order scalar-tensor theories after GW170817

Speaker: Tsutomu Kobayashi (Rikkyo U.)

Slides 01_Kobayashi_after_GW_170817.pdf

14:15 Holographic Dark Matter Fluid in Late Universe

Speaker: Yun-Long Zhang (APCTP)

Slides 02._2YunLongZhang_hDM180830.pdf

14:30 Beyond Fierz-Pauli theory

Speaker: Rampei Kimura (Waseda U.)

Slides 03._rampei.pdf

14:45 Self-anisotropizing universe in Horndeski theory

Speaker: Hiroaki Tahara (RESCEU, U. of Tokyo)

Slides 04_tahara_20180830_self-anisotropizing_universe_in_Horndeski_theory.pdf 04_tahara_20180830_self-anisotropizing_universe_in_Horndeski_theory.pptx

15:00 Galileon and generalized Galileon with projective invariance in metric-affine formalism

Speaker: Katsuki Aoki (Waseda U.)

Slides 5.COSMO18_AOKI.pdf

15:15 Positivity bounds on vector boson scattering at the LHC

Speaker: Shuang-Yong Zhou (U. of Science and Technology of China)

Slides 06._zhousy.key 06._zhousy.pdf

15:30 Constraining Effective Theories for Cosmology and Gravity

Speaker: Scott Melville (Imperial College London)

Slides 07._Melville_COSMO_30Aug2018.pdf

14:00 → 16:00 Parallel Session: Inflation 2

Convener: Ki-Young Choi

14:00 Inflation in the Mixed Higgs-R2 Model

Speaker: Minxi He (RESCEU, U. of Tokyo)

Slides 1._Inflation_in_the_Mixed_Higgs-R^2_Model.pdf 1._Inflation_in_the_Mixed_Higgs-R^2_Model.pptx

14:15 Matching and running: predictions in non-renormalizable inflationary models

Speaker: Jacopo Funagalli (Nikhef)

Slides 2._Fumagalli-Matching.pdf 2._Fumagalli-Matching.pptx

14:30 Probing Starobinsky R2 inflation with CMB precision cosmology

Speaker: Yuki Watanabe (NIT, Gunma College)

Slides 3._watanabe_cosmo_aug2018.key 3._watanabe_cosmo_aug2018.pdf

14:45 Sidetracked Inflation

Speaker: Sebastian Garcia-Saenz (Institut d'astrophysique de Paris)

Slides 4._COSMO18_GarciaSaenz.pdf

15:00 Search for hybrid inflation with the cosmological collider

Speaker: Yi-Peng Wu (U. of Tokyo)

Slides 5._Cosmo18_Yi-Peng_Wu.key 5._Cosmo18_Yi-Peng_Wu.pdf

15:15 Pole N-Flation

Speaker: Marco Scalisi (KU Leuven)

Slides 6._M.ScalisiCOSMO18.pdf

15:30 Quantum diffusion during inflation and primordial black holes

Speaker: Chris Pattison (ICG, U. of Portsmouth)

Slides 7._CPattison-cosmo-18-talk.pdf

15:45 Better be careful with cosmological frames

Speaker: Mario Herrero-Valea (EPFL)

Slides 8._Mario_Herrero.key 8._Mario_Herrero.pdf

14:00 → 16:00 Parallel Session: Particle Physics/Early Universe

Convener: Ayuki Kamada

14:00 Magnetogenesis from chiral plasma instability and baryon asymmetry of the Universe

Speaker: Kohei Kamada (IBS-CTPU)

Slides 1.Kohei_Kamada__KK_0830COSMO.pdf

14:15 Gravitational waves from first order electroweak phase transition in models with the U(1)_X gauge symmetry

Speaker: Toshinori Matsui (KIAS)

Slides 2._Toshinori_Matsui__180830COSMO_matsui.pdf

14:30 Exploring dynamical CP violation induced baryogenesis by gravitational waves and colliders

Speaker: Fa Peng Huang (IBS-CTPU)

Slides 3.Fa_Peng_Huang__FPH_cosmo2018_copy.pdf

14:45 Gamma-ray spectral modulations induced by photon-ALP-dark photon oscillations

Speaker: Seokhoon Yun (KAIST/IBS-CTPU)

Slides 4._Seokhoon_Yun__Cosmo18_30.08.key 4._Seokhoon_Yun__Cosmo18_30.08.pdf

15:00 Supersymmetric Flaxion

Speaker: Daisuke Hagihara (U. of Tokyo)

Slides 5._Daisuke_Hagihara_COSMO18.pdf

15:15 Can deep infrared modes beyond current horizon scale affect observable primordial fluctuations?

Speaker: Junsei Tokuda (Kyoto U.)

Slides 6._Junsei_Tokuda(Cosmo18).pdf

16:00 → 16:30 Coffee Break

16:30 → 18:30 Parallel Session: Baryogenesis

Convener: Eibun Senaha

16:30 Can we probe the Universe at the Fermi epoch in the lab?

Speaker: Inar Timiryasov (EPFL)

Slides 8._Inar_Timiryasov_COSMO18.pdf

16:45 New conservation law in low scale leptogenesis

Speaker: Shintaro Eijima (Leiden U.)

Slides 9._Shintaro_Eijima__COSMO18_Eijima.pdf

17:00 Pendulum Leptogenesis

Speaker: Neil Barrie (Kavli IPMU)

Slides 10.Neil_Barrie__COSMO2018_NDBarrie.pdf

17:15 Non-thermal WIMP baryogenesis

Speaker: Jongkuk Kim (Sungkyunkwan U.)

Slides 11._JongkukKim_Cosmo.pdf

17:30 Spontaneous Leptogenesis in Continuum-Clockwork Axion Models

Speaker: Jeff Kost (IBS-CTPU)

Slides 12.Jeff_Kost__KOST_COSMO.pdf

17:45 Leptogenesis from Dark Matter Annihilations in Scotogenic Model

Speaker: Arnab Dasgupta (Seoul Tech)

Slides 13._Arnab_Dasgupta__Como18_adasgupta.pdf

18:00 Leptogenesis in Cosmological Relaxation with Particle Production

Speaker: Fang Ye (KAIST)

Slides 14.Fang_Ye__fye_cosmo18.pdf

18:15 Effective electroweak baryogenesis

Speaker: Marieke Postma (Nikhef)

Slides 15._Marieke_Postma_cosmo18.pdf

16:30 → 18:30 Parallel Session: Dark Energy / Modified Gravity 2

Convener: Tsutomu Kobayashi

16:30 Stringy Gravity and the Einstein Double Field Equations

Speaker: Stephen Angus (Ewha Womans U.)

Slides Angus_Cosmo2018.pdf

16:45 Model selection and constraints from Holographic dark energy scenarios

Speaker: Mohammad Malekjani (Bu Ali Sina U.)

Slides 09.Malekjani.pdf

17:00 Tension of H0 and its possible solution

Speaker: Seokcheon Lee (Sungkyunkwan U.)

Slides 10._SLEE.pdf

17:15 Thermodynamics of Dark Energy Models in Loop Quantum Cosmology

Speaker: Abdul Jawad (COMSATS Institute of Information Technology)

Slides 11._COSMO-talk-2018-Jawad.pdf

16:30 → 18:30 Parallel Session: Early Universe

Convener: Yun-Long Zhang

16:30 The evolution and decay of hadronic inhomogeneities in the early universe

Speaker: Soma Sanyal (U. of Hyderabad)

Slides 1._somasanyalcosmo18.pdf 1._somasanyalcosmo18.pptx

16:45 Inflationary universes born out of the highly inhomogeneous initial condition

Speaker: Naritaka Oshita (RESCEU)

Slides 2._COSMO-18_Naritaka_Oshita.key 2._COSMO-18_Naritaka_Oshita.pdf

17:00 The no-boundary proposal in loop quantum cosmology

Speaker: Suddhasattwa Brahma (APCTP)

Slides 3._Cosmo-18.pdf

17:15 Quantum Entanglement in Multi-field inflation

Speaker: Shuntaro Mizuno (Yukawa Institute for Theoretical Physics)

Slides 4._Mizuno.pdf

17:30 Numerically probing many field inflation with PyTransport

Speaker: David Mulryne (Queen Mary U. of London)

Slides 5._mulryneCOSMO18.key 5._mulryneCOSMO18.pdf

17:45 A New Semiclassical Picture of Vacuum Decay

Speaker: Jonathan Braden (U. College London)

Slides 6._COSMO18-JonathanBraden.key 6._COSMO18-JonathanBraden.pdf

18:00 The cosmic QCD epoch at non-vanishing lepton asymmetry

Speaker: Isabel M. Oldengott (U. of Valencia)

Slides 7._Oldengott.pdf

18:15 Aspects of Dark Matter Axion Clumps

Speaker: Mark Hertzberg (Tufts U.)

Slides 8._AspectsofAxionsCosmo.pdf

Friday, 31 August

09:00 → 10:30 Plenary Session

Convener: Jihn E. Kim

09:00 Multimessenger Astronomy with Neutrinos at the South Pole: IceCube and Future Observatories in the Ice

Speaker: Dr Kael Hanson (U. of Wisconsin-Madison)

Slides 01._Hanson_-_MMA_IceCube_COSMO18.pdf 01._Hanson_-_MMA_IceCube_COSMO18.pptx

Video https://www.youtube.com/watch?v=4iYcWjByGvU&t=0s

09:30 Status and prospect of theories on the origin of matter-antimatter asymmetry in the universe

The origin of the matter antimatter asymmetry of the universe remains unexplained in the Standard Model of particle physics. The origin of the flavour structure is another major puzzle of the theory. In this talk, we report on recent work attempting to link the two themes through the appealing framework of electroweak baryogenesis. We show that Yukawa couplings of Standard Model fermions can be the source of CP-violation for electroweak baryogenesis if they vary at the same time as the Higgs is acquiring its vacuum expectation value, offering new avenues for electroweak baryogenesis. The advantage of this approach is that it circumvents the usual severe bounds from Electric Dipole moments. These ideas apply if the mechanism explaining the flavour structure of the Standard Model is connected to electroweak symmetry breaking, as motivated for instance in Composite Higgs models.

Speaker: Dr Geraldine Servant (U. of Hamburg)

Slides 02._1_Servant_COSMO18_Daejeon.pdf

Video https://www.youtube.com/watch?v=4iYcWjByGvU&t=1861s

10:00 Utilities of Gravitational Waves for Probing Dark Matter

We propose that LIGO can see the dark matter possibly in the form of a compact object of 10 solar mass or heavier. It is through the fringe signal imprinted on the gravitational wave(GW). The fringe is a frequency-dependent interference pattern induced gravitationally when the GW passes by compact dark matter. Surprisingly, LIGO is the one that can measure this most efficiently. We discuss underlying physics and prospects of the GW fringe measurement. Refs: [1712.01396], [1710.03269]

Speaker: Dr Sunghoon Jung (Seoul National U.)

Slides 03._GWUtilities-sunghoon.pdf

Video https://www.youtube.com/watch?v=4iYcWjByGvU&t=3625s

10:30 → 11:00 Concluding remarks and outlook

Speaker: Dr Leszek Roszkowski (Astrocent, Nicolaus Copernicus Astronomical Center Polish Academy of Sciences and National Centre for Nuclear Research)

Slides cosmo18_roszkowski.pdf

Video https://www.youtube.com/watch?v=4iYcWjByGvU&t=5498s

11:00 → 13:00 IBS/CAPP Facility Tour

Before the excursion, there will be a short facility tour at IBS axion dark matter search lab CAPP with a light lunch

13:00 → 17:00 Excursion

Tour to the historic sites of Baekje Dynasty in Gongju City.