Light Dark World International Forum 2016

Asia/Seoul
CTPU seminar room (Daejeon, Korea)

CTPU seminar room

Daejeon, Korea

Brian Batell (Pittsburgh), Hye-Sung Lee (IBS)
Description

Light Dark World 2016 

July 11-15, 2016

IBS Center for Theoretical Physics of the Universe, Daejeon, Korea

Light Dark World 2016 is the inaugural meeting of the Light Dark World International Forum. It will be held on July 11-15, 2016 at the Center for Theoretical Physics of the Universe (CTPU) of the Institute for Basic Science (IBS), located at Daejeon in South Korea.

Light Dark World 2016 will bring together global experts from experiment and theory to discuss recent advances and develop new opportunities to study new light particles beyond the Standard Model, including light gauge boson, light scalar, light dark matter, axion, axion-like particle, and light sterile neutrinos.

http://indico.ibs.re.kr/e/LDW2016

 


[Notice]

  • If you want to attend the forum dinner (Thursday evening), please pay KRW 20,000 at the CTPU admin office on your first day, unless you are a speaker.
  • If you want to join the excursion (Friday afternoon), please pay KRW 20,000 at the CTPU admin office on your first day.

 

Poster
Participants
  • Alejandro Ibarra
  • Ann Nelson
  • Brian Batell
  • Chun Sil Yoon
  • David Morrissey
  • Deog-Ki Hong
  • Ernest Ma
  • Gordan Krnjaic
  • Hang Bae Kim
  • Hwidong Yoo
  • HyangKyu Park
  • Hye-Sung Lee
  • Hyun Min Lee
  • Hyun Su Lee
  • Jonghee Yoo
  • kenji kadota
  • Kenji Nishiwaki
  • Ketevi Adikle Assamagan
  • Kihyeon Cho
  • Kim Hyungjin
  • Kiwoon Choi
  • Kunio Kaneta
  • Kyu Jung Bae
  • Manfred Lindner
  • Min-Seok Seo
  • Minho Son
  • Myeonghun Park
  • Neelima Sehgal
  • Ohkyung Kwon
  • Patrick deNiverville
  • Pyungwon Ko
  • Rouven Essig
  • Ryoutaro Watanabe
  • Sang Hui Im
  • Sanghyeon Chang
  • Sangjun Lee
  • Sean Tulin
  • Seongchan Park
  • Seung J. Lee
  • Siyeon Kim
  • Soo-Bong Kim
  • Stephen Angus
  • Toyokazu Sekiguchi
  • Walter Bonivento
  • Won Sang Cho
  • Yang-Hwan Ahn
  • Yannis Semertzidis
  • Yong Tang
  • Youngjoon Kwon
  • Yuhsin Tsai
  • Zhaofeng Kang
IBS CTPU admin office
    • 9:00 AM
      Registration and Coffee CTPU

      CTPU

    • Welcome and Introduction: (session chair: Hye-Sung Lee) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 1
        Welcome and Introduction
        Speaker: Kiwoon Choi (IBS-CTPU)
        Slides
    • Morning Session 1: (session chair: Brian Batell) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 2
        New Direct Detection Probes of sub-GeV Dark Matter
        Speaker: Rouven Essig (Stony Brook)
        Slides
      • 3
        Implications of Naturalness for Searches for Light Dark Sectors
        Speaker: David Morrissey (TRIUMF)
        Slides
    • 11:10 AM
      Coffee CTPU seminar room

      CTPU seminar room

    • Morning Session 2: (session chair: Brian Batell) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 4
        Dark-sector searches from flavor-factory experiment
        Speaker: Youngjoon Kwon (Yonsei)
        Slides
      • 5
        New faces of dark matter: SIMP and its friends
        Speaker: Hyun Min Lee (Chuang-Ang)
        Slides
    • 1:00 PM
      Lunch Cafeteria

      Cafeteria

    • Afternoon Session: (session chair: Ketevi Assamagan) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 6
        New Electron Fixed Target Experiments to Search for Light Dark Matter
        This talk analyzes the present status of sub-GeV thermal dark matter annihilating through Standard Model mixing. In these scenarios, the requirement that dark matter be a thermal relic sets a sharp sensitivity target for terrestrial experiments, and that one of the simplest and best-motivated interactions between the SM and light dark matter the vector portal remains viable. Moreover, it is demonstrated that a small set of future experiments that can decisively test these models. The talk will emphasize electron beam fixed target experiments but will also survey other techniques.
        Speaker: Gordan Krnjaic (Fermilab)
        Slides
      • 7
        Right-handed neutrino dark matter and the B-L gauge boson
        Speaker: Kunio Kaneta (IBS-CTPU)
        Slides
    • Coffee and Discussions CTPU

      CTPU

    • Coffee and Discussions CTPU

      CTPU

    • Morning Session 1: (session chair: David Morrissey) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 8
        Cosmic Microwave Background Probes of Light Particles
        Speaker: Neelima Sehgal (Stony Brook)
        Slides
      • 9
        Phenomenology of light sterile neutrinos
        Speaker: Manfred Lindner (MPI Heidelberg)
        Slides
    • 11:10 AM
      Coffee CTPU seminar room

      CTPU seminar room

    • Morning Session 2: (session chair: David Morrissey) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 10
        Enhanced Production of Sterile Neutrinos at Accelerator Experiments
        Speaker: Brian Batell (Pittsburgh)
        Slides
      • 11
        Dark radiation with WIMPZILLA
        Speaker: Seongchan Park (Yonsei)
        Slides
    • 1:00 PM
      Lunch Cafeteria

      Cafeteria

    • Afternoon Session: (session chair: Sean Tulin) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 12
        Disappearance of dancing reactor neutrinos at RENO
        The RENO collaboration has observed energy and baseline distance dependent disappearance of reactor neutrinos that are emitted from the Hanbit nuclear power plant in South Korea. The experimental group has measured a neutrino squared-mass difference and the smallest neutrino mixing probability more precisely. Both of them are essential for understanding the unknown nature of neutrinos. The RENO measured value of the mass difference between the heaviest and lightest neutrinos is roughly a billionth of an electron mass. The experiment observes surprising spectral deviation from the prediction of reactor neutrino models. In this talk, we will present recent results of reactor neutrino oscillation at RENO.
        Speaker: Soo-Bong Kim (SNU)
        Slides
      • 13
        Interacting Dark Matter and Radiation in Cosmology
        Speaker: Tang Yong (KIAS)
        Slides
    • Coffee and Discussions CTPU

      CTPU

    • Coffee and Discussions CTPU

      CTPU

    • Morning Session 1: (session chair: Ernest Ma) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 14
        The physics potential of the SHiP experiment at CERN
        SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERN SPS Committee, who recommended that the experiment proceeds further to a Comprehensive Design phase. In its initial phase, the 400GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating $2\times 10^{20}$ pot in 5 years. A dedicated detector, based on a long vacuum tank followed by a spectrometer and particle identification detectors, will allow probing a variety of models with light long-lived exotic particles and masses below O(10) GeV/c$^2$. The main focus will be the physics of the so-called Hidden Portals, i.e. search for Dark Photons, Light scalars and pseudo-scalars, and Heavy Neutrinos. The sensitivity to Heavy Neutrinos will allow for the first time to probe, in the mass range between the kaon and the charm meson mass, a coupling range for which Baryogenesis and active neutrino masses could also be explained. Another dedicated detector will allow the study of neutrino cross-sections and angular distributions. $\nu_\tau$ deep inelastic scattering cross sections will be measured with a statistics 1000 times larger than currently available, with the extraction of the $F_4$ and $F_5$ structure functions, never measured so far and allow for new tests of lepton non-universality with sensitivity to BSM physics. This second detector will also allow direct dark matter detection produced in the decay of the dark photons.
        Speaker: Walter Bonivento (INFN Cagliari)
        Slides
      • 15
        Role of dark Higgs boson in DM phenomenology
        Speaker: Pyungwon Ko (KIAS)
        Slides
    • 11:10 AM
      Coffee CTPU seminar room

      CTPU seminar room

    • Morning Session 2: (session chair: Ernest Ma) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 16
        Self-interacting dark matter and new light forces
        Speaker: Sean Tulin (York)
        Slides
      • 17
        A new constraint on millicharged dark matter from galaxy clusters
        Speaker: Toyokazu Sekiguchi (IBS-CTPU)
        Slides
    • 1:00 PM
      Lunch Cafeteria

      Cafeteria

    • Afternoon Session: (session chair: Hyun Min Lee) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 18
        Searches for axion and sterlile neutrino from the CUP (Center for Undergroud Physics), IBS
        The CUP at IBS has performed two experiments, KIMS (Korean Invisible Mass Search) at Yangyang Underground Laboratory and NEOS (Neutrino Experiment for Oscillation at Short baseline) in the tendon gallery of 3 GWth nuclear reactor at Yeounggwang. In this talk, we will will present results for solar axion search from the KIMS and for sterile neutrino search from the NEOS.
        Speaker: Hyang Kyu Park (IBS CUP)
        Slides
    • Coffee and Discussions CTPU

      CTPU

    • Coffee and Discussions CTPU

      CTPU

    • Morning Session 1: (session chair: Alejandro Ibarra) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 19
        CP Violation, Fermion oscillations and Baryogenesis
        I discuss some recent work on oscillations of heavy neutral fermions, including neutral baryons. I discuss how to obtain sizable CP violation in such oscillations, and possible connections with baryogenesis and with dark matter.
        Speaker: Ann Nelson (Washington)
        Slides
      • 20
        Faking The Diphoton Excess (?) by Displaced Dark Photon Decays
        When passing identification cuts, a particle beyond SM can fake an SM object in a collider experiment. In this talk, I show how a light and meta-stable dark photon which decays into e+e- can fake an SM photon, either converted or unconverted, at the LHC. Using the recent hint of 750 GeV diphoton signal as an example, we discuss the distinct feature of the fake photon signal and how the signal can be imbedded into a larger class of theoretical explanation for the 750 GeV. I also discuss possible ways of distinguishing these dark photon decays from real photon events in the future.
        Speaker: Yuhsin Tsai (Maryland)
        Slides
    • 11:10 AM
      Coffee CTPU seminar room

      CTPU seminar room

    • Morning Session 2: (session chair: Alejandro Ibarra) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 21
        The axion dark matter search at CAPP: a comprehensive approach, and the proton EDM experiment
        Axions are the result of a dynamic field, similar to Higgs field, invented to solve the so-called Strong CP-problem, i.e., why the electric dipole moment (EDM) of the neutron and proton has not been observed so far even though the theory of QCD requires otherwise. Axions as dark matter can be thought of as an oscillatory field interacting extremely weakly with normal matter other than gravitationally. The oscillation frequency is unknown, it can be anywhere between f = 200MHz to 200GHz and it’s expected to be a very narrow line, about df/f=10^-6. A very strong magnetic field can be used to convert part of that field into a very weak electric field oscillating at the same frequency as the axion field. In the coming years we plan to develop our experimental sensitivity to either observe or refute the axions as a viable dark matter candidate. That approach includes the development of ultra strong magnets, high quality resonators in the presence of strong B-fields, new resonator geometries with high volume, low noise cryo-amplifiers and new techniques of detecting axions. Another related subject, through the strong CP-problem, is the search for the EDM of the proton, improving the present sensitivity by more than three orders of magnitude. Usually the study of EDM involves the application of strong electric fields and neutral systems were thought to be easier to work with at first. Recently it became clear that charged particles in all-electric storage rings can be used instead, for sensitive EDM searches by using techniques similar to the muon g-2 experiment. The high sensitivity study of the proton EDM is possible due to the high intensity polarized proton beams readily available today, making possible to reach beyond 10^3 TeV in New Physics mass scale.
        Speaker: Yannis Semertzidis (IBS CAPP, KAIST)
        Slides
      • 22
        Relaxion from multiple axions
        Speaker: Sang Hui Im (IBS-CTPU)
        Slides
    • 1:00 PM
      Lunch Cafeteria

      Cafeteria

    • Afternoon Session: (session chair: Hyun Min Lee) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 23
        Search for Dark Interactions at the LHC
        Hidden sector or dark sector states appear in many extensions to the Standard Model, to provide a candidate for the dark matter in the universe or to explain astrophysical observations of positron excesses. A hidden or dark sector can be introduced with an additional $U(1)_d$ dark gauge symmetry. The presence of the dark sector could be inferred either from deviations from the SM-predicted rates of Drell-Yan (DY) events or from Higgs boson decays through exotic intermediate states. The discovery of the Higgs boson during Run 1 of the Large Hadron Collider opens a new and rich experimental program that includes the search for exotic decays H —> Z Zdark —> 4l and H —> Zdark Zdark -> 4l, where Zdark is a dark vector boson. In this talk, we will review the status of current searches for dark sector states at the LHC and the prospects for LHC Run 2.
        Speaker: Ketevi Assamagan (BNL)
        Slides
    • Coffee and Discussions CTPU

      CTPU

    • 6:00 PM
      Forum Dinner Gyejeolbapsang (TimeWorld)

      Gyejeolbapsang (TimeWorld)

    • Coffee and Discussions CTPU

      CTPU

    • Morning Session 1: (session chair: Rouven Essig) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 24
        Light Dark Matter and Neutrinos
        The possible connection between neutrinos and light dark matter is explored. There are a number of interesting scenarios, including (I) the scattering of light dark matter off neutrinos in the Universe, (II) the radiative generation of neutrino masses from warm dark matter, and (III) the emergence of warm dark matter in left-right symmetry.
        Speaker: Ernest Ma (Riverside)
        Slides
      • 25
        Searching for Light Dark Matter with Proton-Beam Fixed Target Experiments
        Speaker: Patrick deNiverville (Victoria)
        Slides
    • 11:10 AM
      Coffee CTPU seminar room

      CTPU seminar room

    • Morning Session 2: (session chair: Rouven Essig) CTPU seminar room

      CTPU seminar room

      Daejeon, Korea

      • 26
        Dark matter decay via the gravity portal
        We consider the Standard Model extended with a dark matter particle in curved spacetime, motivated by the fact that the only current evidence for dark matter is through its gravitational interactions, and we investigate the impact on the dark matter stability of terms in the Lagrangian linear in the dark matter field and proportional to the Ricci scalar. We show that this "gravity portal" induces decay even if the dark matter particle only has gravitational interactions, and that the decay branching ratios into Standard Model particles only depend on one free parameter: the dark matter mass. We study in detail the case of a light singlet scalar and discuss the prospects to observe its gravitationally induced decay.
        Speaker: Alejandro Ibarra (TU Munich)
    • 12:30 PM
      Lunch Cafeteria

      Cafeteria

    • Excursion Gonju City

      Gonju City