CosPA 2015

12 Oct 2015, 08:00 → 16 Oct 2015, 18:00 Asia/Seoul

Supex Hall (Lecture Building, KAIST Munji Campus, Daejeon, Korea)

Kiwoon Choi (CTPU, IBS), Sang Pyo Kim (Kunsan National University)

CosPA 2015 

12-16 October 2015

Lecture Building, KAIST Munji Campus, Daejeon, Korea

12th Conference in the Symposium on Cosmology and Particle Astrophysics series 12-16 October 2015, Daejeon, Korea.

CosPA 2015 is the 12th International Symposium on Cosmology and Particle Astrophysics. It will be held from the 12-16 October 2015 at the Center for Theoretical Physics of the Universe (CTPU) of Institute for Basic Science (IBS), located at the KAIST Munji Campus in Daejeon City.

CosPA 2015 conference will bring together theorists, experimentalists and observers working in the field of cosmology, astrophysics and particle physics to discuss the latest results and ideas and the prospects for progress.

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Photos from ESA and  arXiv:1504.03388

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Poster Photos from ESA and arXiv:1504.03388 Photo from arXiv:1504.03388

Monday, 12 October ¶

08:00 → 09:00 Registration¶

Registration for the workshop and social event

09:00 → 09:15 Opening¶

Opening Remark by IBS president Dr. Doochul Kim and APCosPA director Dr. Pauchy W-Y. Hwang

Speakers: Dr Doochul Kim (IBS), Dr Pauchy W-Y. Hwang (APCosPA)

Slides CosPA15.ppt

09:15 → 12:35 Plenary Session¶

Conveners: Dr Gungwon Kang (Chair), Dr Sang Pyo Kim (Chair)

09:15 Status of Neutrino Astronomy¶

The latest results from neutrino telescopes will be reviewed. The observation of high-energy astro-physical neutrinos by IceCube will be discussed and potential sources candidates evaluated. The talk will conclude with an overview of the discovery potential at the next generation of neutrino telescopes.

Speaker: Dr Carsten Rott (Sungkyunkwan U.)

Slides Rott_CosPA2015.pdf

10:00 Baryon Acoustic Oscillations: A Robust and Precise Route to the Cosmological Distance Scale¶

The baryon acoustic oscillations now provide one of our most robust methods for measuring the cosmic distance scale. I will review the physical principles of the method and describe some recent developments in the practical methodology. I will then present recent BAO results and cosmological implications from the Baryon Oscillation Spectroscopic Survey, part of Sloan Digital Sky Survey III. I will close with a discussion of plans for the next generation of wide-field spectroscopic surveys.

Speaker: Dr Daniel Eisenstein (Harvard U.)

Slides COSPA.Oct15.Eisenstein.pptx

10:45 Break

11:05 Status of CMB observations: Planck and beyond¶

I will review the current status of CMB observations focusing on the ESA Planck mission. I will also review the status of B modes searches, reviewing the current limits and the many experiments coming online or in the planning stage that promise either to make a first discovery or to substantially tighten current upper bounds.

Speaker: Dr Martin Bucher (APC/U. of Paris)

Slides bucherTalk.pdf

11:50 Progress and Status of PandaX experiment in China Jinping Underground Lab¶

Speaker: Dr Xiangdong Ji (U. of Maryland)

Slides cospa_jipub.pdf

12:45 → 14:00 Lunch

14:00 → 15:40 Parallel 1: A1¶

Conveners: Jinn-Ouk Gong (Convener), Sekiguchi Toyokazu (Chair)

14:00 Small scale isocurvature perturbation of WIMP¶

Speaker: Dr Ki-Young Choi (KASI)

Slides KYChoi.pdf

14:25 Domain wall formation and baryogenesis in the Axiverse¶

Speaker: Dr Naoya Kitajima (Tohoku University)

Slides kitajima_CosPA2015.pdf

14:50 Diluting the inflationary axion fluctuation by a stronger QCD in the early Universe¶

Speaker: Dr Sang Hui Im (CTPU/IBS)

Slides COSPA_15_SH_IM.pdf

15:15 Disappearing inflaton potential¶

Speaker: Dr Fuminobu Takahashi (Tohoku University)

Slides Takahashi1012.pdf

14:00 → 15:40 parallel 2: C1¶

Conveners: Carsten Rott (Chair), Kenji Kadota (Convener)

14:00 Origin of GeV-TeV scale Cosmic-Ray Physics: Dark Matter vs Pulsars?¶

Speaker: Dr Yong-Yeon Keum (SNU)

Slides CosPA2015_yyk.pdf

14:25 IceCube Events from Heavy DM decays through the Right-handed Neutrino Portal¶

Speaker: Dr Yong Tang (KIAS)

Slides IceCube_DM_TANG.pdf

14:50 Fermion Semi-annihilating Dark Matter¶

Speaker: Dr Andrew Spray (CTPU/IBS)

Slides Spray_CosPA2015.pdf

15:15 Dark matter from a broken Mirror Symmetry¶

Speaker: Mr Stephen Lonsdale (Univ. of Melbourne)

Slides COSPAstephenlonsdale6.pdf

15:40 → 16:00 Break

16:00 → 17:40 Parallel 1: B1¶

Conveners: Seokcheon Lee (Chair), Yong-Seon Song (Convener)

16:00 CMB probes on generally correlated axion isocurvature perturbations¶

Speaker: Dr Kenji Kadota (CTPU/IBS)

Slides kadotacospa2.pdf

16:25 POLARBEAR and Simons Array: Results and Future Prospects for CMB Polarization Measurements¶

Speaker: Dr Haruki Nishino (KEK)

Slides HNishino_POLARBEAR_CosPA2015_upload.pdf

16:50 LiteBIRD, Lite satellite for the study of B-mode polarization and Inflation from cosmic microwave background Radiation Detection¶

Speaker: Dr Hirokazu Ishino (Okayama University)

Slides 151010-LiteBIRD-ishino.pdf

16:00 → 17:15 parallel 2: C2¶

Conveners: Kenji Kadota (Convener), Ki-Young Choi (Chair)

16:00 Gravity on Equation of State¶

Speaker: Dr Hyeong-Chan Kim (Korea National University of Transportation)

Slides GrOnEoS(HCKim).pdf

16:25 Interferometric Probes of Planckian Quantum Geometry¶

Speaker: Dr Ohkyung Kwon (KAIST)

Slides CosPA2015.pdf

16:50 A Particle Probing Thermodynamics in Rotating AdS Black Hole¶

Speaker: Dr Bogeun Gwak (CQUeST)

Slides CosPA2015-Bogeun_Gwak.pdf

Tuesday, 13 October ¶

09:00 → 12:30 Plenary Session¶

Convener: Yong-Seon Song (Chair)

09:00 Cosmic Infrared Background¶

In this talk I will summarize applications and measurements related to the cosmic infrared background (CIB), its power spectrum and cross-correlations, among others.

Speaker: Dr Asantha Cooray (U.C. Irvine)

Slides Cooray-Korea-October2015.pdf

09:45 Searching for dark matter with gamma rays¶

Evidence for dark matter is overwhelming. From experimental data we can infer that dark matter constitutes most of the matter in the Universe and that it interacts very weakly, and at least gravitationally, with ordinary matter. However we do not know what it is. Several theoretical models have been proposed that predict the existence of Weakly Interacting Massive Particles (WIMPs) that are excellent dark matter candidates. The existence of WIMPs can be tested indirectly, primarily through their annihilation or decay into photons. In this talk I'll present the latest results on these searches.

Speaker: Dr Simona Murgia (U.C. Irvine)

Slides CosPA15-Murgia.pdf

10:30 Break

11:00 Neutrinos in cosmology¶

Speaker: Dr Yvonne Wong (U. of New South Wales)

Slides yyyw.pdf

11:45 Cosmology with the HETDEX survey¶

HETDEX (Hobby-Eberly Telescope Dark Energy eXperiment) is a galaxy survey targeting Lyman-alpha emitters (LAEs) at high redshifts (1.9 < z < 3.5). Starting from late 2015, the survey will observe about a million LAEs over ~400 sq. degrees, which corresponds to ~10Gpc³ in volume. The main science goal of HETDEX is to measure the angular diameter distance and the Hubble expansion rate at high redshifts (z~2.5 and z~3) within a percent accuracy, so that we can measure the dark energy density better than 3-σ. In this talk, I will introduce the HETDEX survey, summarize the survey design, observing strategy, as well as various cosmological information that the dataset can provide.

Speaker: Dr Donghui Jeong (Penn State U.)

Slides 20151013_CosPA_djeong.pdf

12:45 → 14:00 Lunch

14:00 → 15:40 Parallel 1: B2¶

Conveners: Daniel Eisentstein (Chair), Yong-Seon Song (Convener)

14:00 Two systematic errors in Redshift Space Distortion effect model¶

Speaker: Dr Yi Zheng (KASI)

Slides 151013_workshop_talk_CosPA_Yi.pdf

14:25 Analysis of Anisotropic Galaxy Clustering with Massive Neutrino Using BOSS DR11¶

Speaker: Ms Minji Oh (KASI)

Slides CosPA_MinjiOH.pdf

14:50 Investigating the evolution of massive galaxies using semi-analytic approaches¶

Speaker: Dr Jaehyun Lee (KASI)

Slides jaehyun_lee.pdf

15:15 DESI Fibre Assignment and Mitigating Redshift Incompleteness¶

Speaker: Mr Husni Almoubayyed (Durham Univ.)

Slides DESI_Husni.pdf

14:00 → 15:40 parallel 2: C3¶

Conveners: Kenji Kadota (Convener), Simona Murgia (Chair)

14:00 Energy Peak: back to the cosmic gamma-ray excess¶

Speaker: Dr Jong-Chul Park (Chungnam National Univ.)

Slides E-Peak_JCPark.pdf

14:25 Morphology of the Soft X-ray Excess in Galaxy Clusters from a Cosmic ALP Background¶

Speaker: Dr Stephen Angus (CTPU/IBS)

Slides SAngus_CosPA_2015.pdf

14:50 Measuring the TeV Cosmic Ray Electron Flux with CREST¶

Speaker: Dr Michael Schubnell (University of Michigan)

Slides CREST-2015_CosPA.pdf

15:15 Cavity-based Axion Dark Matter Search at CAPP/IBS¶

Speaker: Dr SungWoo Youn (CAPP/IBS)

Slides CosPA2015_YOUN.pdf

15:40 → 16:00 Break

16:00 → 17:40 Parallel 1: B3¶

Conveners: Asantha Cooray (Chair), Yong-Seon Song (Convener)

16:00 Probe of Dark Energy with CMB correlation with Weak Lensing¶

Speaker: Dr Seokcheon Lee (KIAS)

Slides CosPA_SLEE.pdf

16:25 The South Pole Telescope: Unraveling The Mystery Of Dark Energy¶

Speaker: Dr Christian Reichardt (University of Melbourne)

Slides 20151013_cospa15_reichardt.pdf

16:50 Structure formation in decaying dark matter model¶

Speaker: Dr Toyokazu Sekiguchi (CTPU/IBS)

Slides Sekiguchi.pdf

17:15 Cosmological implication of large scale structure of the universe¶

Speaker: Dr Yong-Seon Song (KASI)

Slides tmp_25713-CosPA_yssong-1659271288.pdf

16:00 → 17:40 parallel 2: D1¶

Conveners: Ki-Young Choi (Convener), Yvonne Wong (Chair)

16:00 Oscillating Asymmetric Sneutrino Dark Matter from the Maximally U(1)_L Supersymmetric Inverse Seesaw¶

Speaker: Dr Zhaofeng Kang (KIAS)

Slides osscilating_sneutrino_ADM.pdf

16:25 Self-Interacting Dark Matter from a Non-Abelian Hidden Sector¶

Speaker: Dr Tim Tait (U.C. Irvine)

Slides tait-CosPA.pdf

16:50 Galactic Center excess by Higgs portal dark matter¶

Speaker: Dr Osamu Seto (Hokkai-Gakuen University)

Slides Seto_darkmatter.pdf

17:15 Electroweak Baryogenesis with Anomalous Higgs Couplings¶

Speaker: Dr Archil Kobakhidze (Univ. of Sydney)

Slides CosPA2015_Kobakhidze.pdf

18:05 → 19:35 Banquet

Wednesday, 14 October ¶

09:00 → 11:40 IBS Session¶

Convener: Kiwoon Choi (Chair)

09:00 Introduction of IBS¶

Speaker: Dr Kiwoon Choi (CTPU/IBS)

Slides IBS_Introduction.pptx

09:05 Scientific Programs of CUP¶

The Center for Underground Physics (CUP) aims to pursue searches for new particles and new phenomena beyond the standard model. We are trying to push the experimental limits for the neutrinoless double beta decays (AMoRE) and the direct detection of the WIMPs (KIMS+). We are also working on the reactor neutrino experiment to search for the sterile neutrinos (NEOS). I will describe the scientific significance and the status of these programs.

Speaker: Dr Yeongduk Kim (CUP/IBS)

Slides cospa-ydkim-v1-1.pdf

09:50 Axions, axion dark-matter, and high precision electric dipole moment experiments at CAPP¶

We have just reached the two year anniversary of the establishment of the IBS center for Axion and Precision Physics at the KAIST campus in Korea. Our plan is to establish axion dark matter experiments that will have the sensitivity to answer whether axions are part of the dark matter in our galaxy. We are making advances in high Tc magnet technology, efficient resonator geometries, low noise microwave amplifiers, and in understanding of superconductivity-magnetic field interactions. If successful, we should be able to observe axions even if they are only 10% of the dark matter for a major part of the allowed axion mass in the microwave region. Developments in the storage ring electric dipole moment experiments should increase our sensitivity to θ_QCD and New Physics by several orders of magnitude.

Speaker: Dr Yannis K. Semertizidis (CAPP/IBS)

Slides YkS_CosPA_2015_1014.pdf

10:35 Coffee Break

10:55 Physics of Dark Gauge Interaction¶

Dark gauge interaction typically refers to an interaction mediated by a gauge boson with a very light mass (typically MeV - GeV scale) and a very small coupling to the Standard Model particles. I will overview some of the dark gauge interaction physics based on my own works in this field.

Speaker: Dr Hye-Sung Lee (CTPU/IBS)

Slides Physics_of_Dark_Gauge_Interaction_(CosPA_2015)-1.pdf

11:40 → 13:00 APCosPA Council and General Assembly¶

12:00 → 18:00 Excursion

Excursion to Gongju, ancient city near by Daejeon

18:00 → 19:30 Public Talk: Physics of Interstella¶

Talk in Korean for general public

18:00 Physics of Interstella¶

Speaker: Dr Changhwan Lee (PNU)

Poster poster-pl.jpg

Thursday, 15 October ¶

09:00 → 12:30 Plenary Session¶

Convener: Tim Tait (Chair)

09:00 Theory for Neutrino Mixing¶

Tremendous progresses on neutrino mixing have been made both experimentally and theoretically. Recent data show that the mixing angles in the PMNS are not always small as their quark mixing counter part. In the standard parametrization for three neutrino mixing commonly used, the mixing angle θ₂₃ is close to π/4, θ₁₂ is also large, θ₁₃ is relatively small but away from zero. There are also evidences show that the CP violating Dirac phase delta is close to -π/2 (or 3π/2). In this after some brief review on theoretical ideas about neutrino mixing, I discuss how to understand the mixing pattern and to construct theoretical models to accommodate current data.

Speaker: Dr Xiao-Gang He (Shanghai Jiao Tong Univ./National Taiwan Univ.)

Slides Cospa-Neutrino_mixing.pdf

09:45 Towards gauge theory for EW scale DM¶

I present gauge models for EW scale DM, and discuss the role of DM, dark gauge bosons and dark Higgs in this class of models in the context of particle physics, DM phenomenology and cosmology, including Higgs signal strength, collider searches of DM, galactic center gamma ray excess, dark radiation and Higgs inflation.

Speaker: Dr Pyungwon Ko (KIAS)

10:30 Break

11:00 Axions: Diversity beats Simplicity¶

While axions have been initially proposed as a solution of the strong CP-problem, they might also find useful applications in cosmology: as candidates for cold dark matter, dark energy (quintessence) and inflation. The ultraviolet completion within the framework of string theory provides a plethora of axions and motivates the consideration of mult-axion systems as a solution to some of the remaining problems in explicit model building.

Speaker: Dr Hans Peter Nilles (Bonn U.)

Slides Daejeon.pdf

11:45 Inflation in String Theory¶

Speaker: Dr Gary Shiu (U. of Wisconsin)

12:45 → 14:00 Lunch

14:00 → 15:40 Parallel 1: A2¶

Conveners: Hyun Min Lee (Chair), Jinn-Ouk Gong (Convener)

14:00 Gravitational waves from cosmic bubble collisions¶

Speaker: Dr Dong-Hoon Kim (Ewha Womans University)

Slides CosPA2015_DHKIM.pdf

14:25 Quantum Scalar Corrections to the Newtonian Potential on de Sitter Background¶

Speaker: Dr Sohyun Park (KASI)

Slides spark_CosPA.pdf

14:50 Fermionic Schwinger Current in 4-d de Sitter Spacetime¶

Speaker: Mr Takahiro Hayashinaka (RESCEU, The University of Tokyo)

Slides CosPa_Daejeon_hayashinaka.pptx

15:15 Will quantum cosmology resurrect chaotic inflation model?¶

Speaker: Dr Sang Pyo Kim (Kunsan National Univ.)

Slides CosPA2015-10-15_SPKim2.pdf

14:00 → 15:25 parallel 2: D2:LHC Special Session¶

Conveners: Ki-Young Choi (Convener), Pyungwon Ko (Chair)

14:00 Overview of Dark Matter searches and status in run2 at the CMS experiment¶

Speaker: Dr DongHee Kim (Kyungpook National Univ.)

Slides DarkMatteratCMS-final.pdf

14:35 The ATLAS detector: status and performance in run2¶

Speaker: Dr Steven Schramm (CERN)

Slides StevenSchramm-ATLASrun2-final.pdf

15:00 Overview of Dark Matter searches at the ATLAS experiment¶

Speaker: Dr Bernhard Meirose (U.T. Dallas)

Slides MeiroseCosPA2015.pdf

15:25 → 15:45 Break

15:40 → 16:00 Break

15:45 → 17:50 parallel 2: D3¶

Conveners: Ki-Young Choi (Convener), Xiao Gang He (Chair)

15:45 The e⁺e^- collider experiments to search for dark matter¶

Speaker: Dr Kihyeon Cho (KISTI)

Slides cospa2015_dm_101915.pptx

16:10 Exploring top quark FCNC at hadron colliders in association with flavor physics¶

Speaker: Dr Yeo Woong Yoon (Konkuk Univ.)

Slides YWY-151015-Cospa-TopFCNC-pdf.pdf

16:35 New resonance shapes of heavy Higgs bosons due to interference with the continuum background¶

Speaker: Dr Jenghyeon Song (Konkuk Univ.)

Slides cosPA151015_JSong.pdf

17:00 Beyond the Dark matter effective field theory and a simplified model approach at Colliders¶

Speaker: Dr Myeonghun Park (CTPU/IBS)

Slides cospa2015_PARC.pdf

17:25 Gravitational Compton scattering from the worldline formalism¶

Speaker: Dr Naser Ahmadiniaz (CoReLS/IBS)

Slides Gravitational_Compton_Scattering.pdf

16:00 → 17:40 Parallel 1: A3¶

Convener: Jinn-Ouk Gong (Chair, Convener)

16:00 Classically Scale Invariant Inflation, WIMPzilla, and (A)gravity¶

Speaker: Dr Arsham Farzinnia (CTPU/IBS)

Slides Farzinnia-_CosPa2015.pdf

16:25 Reheating the Universe at Criticality¶

Speaker: Dr Hyun Min Lee (Chung-Ang University)

Slides CosPA2015-hmlee.pdf

16:50 Primordial gravitational waves from the space-condensate inflationary model¶

Speaker: Mr Gansukh Tumurtushaa (Sogang Univ.)

Slides Gansukh_cospa2015.pdf

17:15 Aligned natural inflation and oscillatory feature in primordial power spectrum¶

Speaker: Mr Hyungjin Kim (KAIST)

Slides HyungjinKim_AlignmentOscillation.pdf

Friday, 16 October ¶

09:00 → 11:45 Plenary Session¶

Convener: Sang Pyo Kim (Chair)

09:00 From CMB Observations to Inflation¶

I will discuss the implications of the Planck full mission data as well as the BICEP/KeckArray data for early universe cosmology and will outline what we may hope to learn from upcoming experiments.

Speaker: Dr Raphael Flauger (Univ. of Texas)

Slides 151015.pdf

09:45 Quantum Primordial Standard Clocks¶

In this paper, we point out and study a generic type of signals existing in the primordial universe models, which can be used to model-independently distinguish the inflation scenario from alternatives. These signals are generated by massive fields that function as standard clocks. The role of massive fields as standard clocks has been realized in previous works. Although the existence of such massive fields is generic, the previous realizations require sharp features to classically excite the oscillations of the massive clock fields. Here, we point out that the quantum fluctuations of massive fields can actually serve the same purpose as the standard clocks. We show that they are also able to directly record the defining property of the scenario type, namely, the scale factor of the primordial universe as a function of time a(t), but through shape-dependent oscillatory features in non-Gaussianities. Since quantum fluctuating massive fields exist in any realistic primordial universe models, these quantum primordial standard clock signals are present in any inflation models, and should exist quite generally in alternative-to-inflation scenarios as well. However, the amplitude of such signals is very model-dependent.

Speaker: Dr Yi Wang (HKUST)

Slides Yi_Wang(1).pdf

10:30 Break

11:00 Gravitational waves from the early Universe¶

The gravitational wave is a useful probe of the early Universe which directly carries information of the epochs all the way up to the inflationary era. There are a number of production mechanisms of gravitational waves in the early Universe such as: (i) quantum tensor perturbation generated during inflation, (ii) gravitational waves generated by second-order perturbation of density fluctuations, (iii) those generated by bubble collision after first-order phase transitions, (iv) those created by self-ordering of multi-component scalar fields after a global symmetry breaking, and (v) gravitational from topological defects, especially from oscillating cosmic strings. I will talk about some of the above production mechanisms and discuss their implications to cosmology of the early Universe, in particular, the possibility to determine thermal history using the power spectrum of gravitational waves.

Speaker: Dr Jun'ichi Yokoyama (RESCEU)

11:45 → 11:50 Closing Remark¶