# CosPA 2015

chaired by ,
from to (Asia/Seoul)
at Lecture Building, KAIST Munji Campus, Daejeon, Korea ( Supex Hall )
KAIST Munji Campus. 193, Munji-ro, Yuseong-gu, Daejeon, korea
Description

# 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.

Photos from ESA and  arXiv:1504.03388

Material:
Poster
Support Email: cospa2015@ibs.re.kr Telephone: +82-42-878-8420
Go to day
• Monday, 12 October 2015
• 08:00 - 09:00 Registration
Registration for the workshop and social event
• 09:00 - 09:15 Opening 15'
Opening Remark by IBS president Dr. Doochul Kim and APCosPA director Dr. Pauchy W-Y. Hwang
 Speakers: Dr. Pauchy W-Y. Hwang (APCosPA), Dr. Doochul Kim (IBS) Material:
• 09:15 - 12:35 Plenary Session  Conveners: Dr. Sang Pyo Kim (Chair), Dr. Gungwon Kang (Chair)
• 09:15 Status of Neutrino Astronomy 45'
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.) Material:
• 10:00 Baryon Acoustic Oscillations: A Robust and Precise Route to the Cosmological Distance Scale 45'
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.) Material:
• 10:45 Break 20'
• 11:05 Status of CMB observations: Planck and beyond 45'
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) Material:
• 11:50 Progress and Status of PandaX experiment in China Jinping Underground Lab 45'  Speaker: Dr. Xiangdong Ji (U. of Maryland) Material:
• 12:45 - 14:00 Lunch ( Cafeteria )
• 14:00 - 15:40 Parallel 1: A1  Conveners: Sekiguchi Toyokazu (Chair), Jinn-Ouk Gong (Convener) Location: 103
• 14:00 Small scale isocurvature perturbation of WIMP 25'  Speaker: Dr. Ki-Young Choi (KASI) Material:
• 14:25 Domain wall formation and baryogenesis in the Axiverse 25'  Speaker: Dr. Naoya Kitajima (Tohoku University) Material:
• 14:50 Diluting the inflationary axion fluctuation by a stronger QCD in the early Universe 25'  Speaker: Dr. Sang Hui Im (CTPU/IBS) Material:
• 15:15 Disappearing inflaton potential 25'  Speaker: Dr. Fuminobu Takahashi (Tohoku University) Material:
• 14:00 - 15:40 parallel 2: C1  Conveners: Carsten Rott (Chair), Kenji Kadota (Convener) Location: 104
• 14:00 Origin of GeV-TeV scale Cosmic-Ray Physics: Dark Matter vs Pulsars? 25'  Speaker: Dr. Yong-Yeon Keum (SNU) Material:
• 14:25 IceCube Events from Heavy DM decays through the Right-handed Neutrino Portal 25'  Speaker: Dr. Yong Tang (KIAS) Material:
• 14:50 Fermion Semi-annihilating Dark Matter 25'  Speaker: Dr. Andrew Spray (CTPU/IBS) Material:
• 15:15 Dark matter from a broken Mirror Symmetry 25'  Speaker: Mr. Stephen Lonsdale (Univ. of Melbourne) Material:
• 15:40 - 16:00 Break ( )
• 16:00 - 17:15 parallel 2: C2  Conveners: Ki-Young Choi (Chair), Kenji Kadota (Convener) Location: 104
• 16:00 Gravity on Equation of State 25'  Speaker: Dr. Hyeong-Chan Kim (Korea National University of Transportation) Material:
• 16:25 Interferometric Probes of Planckian Quantum Geometry 25'  Speaker: Dr. Ohkyung Kwon (KAIST) Material:
• 16:50 A Particle Probing Thermodynamics in Rotating AdS Black Hole 25'  Speaker: Dr. Bogeun Gwak (CQUeST) Material:
• 16:00 - 17:40 Parallel 1: B1  Conveners: Seokcheon Lee (Chair), Yong-Seon Song (Convener) Location: 103
• 16:00 CMB probes on generally correlated axion isocurvature perturbations 25'  Speaker: Dr. Kenji Kadota (CTPU/IBS) Material:
• 16:25 POLARBEAR and Simons Array: Results and Future Prospects for CMB Polarization Measurements 25'  Speaker: Dr. Haruki Nishino (KEK) Material:
• 16:50 LiteBIRD, Lite satellite for the study of B-mode polarization and Inflation from cosmic microwave background Radiation Detection 25'  Speaker: Dr. Hirokazu Ishino (Okayama University) Material:
• Tuesday, 13 October 2015
• 09:00 - 12:30 Plenary Session  Convener: Yong-Seon Song (Chair)
• 09:00 Cosmic Infrared Background 45'
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) Material:
• 09:45 Searching for dark matter with gamma rays 45'
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) Material:
• 10:30 Break 30'
• 11:00 Neutrinos in cosmology 45'  Speaker: Dr. Yvonne Wong (U. of New South Wales) Material:
• 11:45 Cosmology with the HETDEX survey 45'
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.) Material:
• 12:45 - 14:00 Lunch ( ( Cafeteria ) )
• 14:00 - 15:40 Parallel 1: B2  Conveners: Daniel Eisentstein (Chair), Yong-Seon Song (Convener) Location: 103
• 14:00 Two systematic errors in Redshift Space Distortion effect model 25'  Speaker: Dr. Yi Zheng (KASI) Material:
• 14:25 Analysis of Anisotropic Galaxy Clustering with Massive Neutrino Using BOSS DR11 25'  Speaker: Ms. Minji Oh (KASI) Material:
• 14:50 Investigating the evolution of massive galaxies using semi-analytic approaches 25'  Speaker: Dr. Jaehyun Lee (KASI) Material:
• 15:15 DESI Fibre Assignment and Mitigating Redshift Incompleteness 25'  Speaker: Mr. Husni Almoubayyed (Durham Univ.) Material:
• 14:00 - 15:40 parallel 2: C3  Conveners: Simona Murgia (Chair), Kenji Kadota (Convener) Location: 104
• 14:00 Energy Peak: back to the cosmic gamma-ray excess 25'  Speaker: Dr. Jong-Chul Park (Chungnam National Univ.) Material:
• 14:25 Morphology of the Soft X-ray Excess in Galaxy Clusters from a Cosmic ALP Background 25'  Speaker: Dr. Stephen Angus (CTPU/IBS) Material:
• 14:50 Measuring the TeV Cosmic Ray Electron Flux with CREST 25'  Speaker: Dr. Michael Schubnell (University of Michigan) Material:
• 15:15 Cavity-based Axion Dark Matter Search at CAPP/IBS 25'  Speaker: Dr. SungWoo Youn (CAPP/IBS) Material:
• 15:40 - 16:00 Break ( )
• 16:00 - 17:40 parallel 2: D1  Conveners: Yvonne Wong (Chair), Ki-Young Choi (Convener) Location: 104
• 16:00 Oscillating Asymmetric Sneutrino Dark Matter from the Maximally U(1)L Supersymmetric Inverse Seesaw 25'  Speaker: Dr. Zhaofeng Kang (KIAS) Material:
• 16:25 Self-Interacting Dark Matter from a Non-Abelian Hidden Sector 25'  Speaker: Dr. Tim Tait (U.C. Irvine) Material:
• 16:50 Galactic Center excess by Higgs portal dark matter 25'  Speaker: Dr. Osamu Seto (Hokkai-Gakuen University) Material:
• 17:15 Electroweak Baryogenesis with Anomalous Higgs Couplings 25'  Speaker: Dr. Archil Kobakhidze (Univ. of Sydney) Material:
• 16:00 - 17:40 Parallel 1: B3  Conveners: Asantha Cooray (Chair), Yong-Seon Song (Convener) Location: 103
• 16:00 Probe of Dark Energy with CMB correlation with Weak Lensing 25'  Speaker: Dr. Seokcheon Lee (KIAS) Material:
• 16:25 The South Pole Telescope: Unraveling The Mystery Of Dark Energy 25'  Speaker: Dr. Christian Reichardt (University of Melbourne) Material:
• 16:50 Structure formation in decaying dark matter model 25'  Speaker: Dr. Toyokazu Sekiguchi (CTPU/IBS) Material:
• 17:15 Cosmological implication of large scale structure of the universe 25'  Speaker: Dr. Yong-Seon Song (KASI) Material:
• 18:05 - 19:35 Banquet ( Main Hall )
• Wednesday, 14 October 2015
• 09:00 - 11:40 IBS Session  Convener: Kiwoon Choi (Chair)
• 09:00 Introduction of IBS 5'  Speaker: Dr. Kiwoon Choi (CTPU/IBS) Material:
• 09:05 Scientific Programs of CUP 45'
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) Material:
• 09:50 Axions, axion dark-matter, and high precision electric dipole moment experiments at CAPP 45'
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 θQCD and New Physics by several orders of magnitude.
 Speaker: Dr. Yannis K. Semertizidis (CAPP/IBS) Material:
• 10:35 Coffee Break 20'
• 10:55 Physics of Dark Gauge Interaction 45'
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) Material:
• 11:40 - 13:00 APCosPA Council and General Assembly  Location:
• 12:00 - 18:00 Excursion ( Gongju )
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 1h30'  Speaker: Dr. Changhwan Lee (PNU) Material:
• Thursday, 15 October 2015
• 09:00 - 12:30 Plenary Session  Convener: Tim Tait (Chair)
• 09:00 Theory for Neutrino Mixing 45'
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.) Material:
• 09:45 Towards gauge theory for EW scale DM 45'
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 30'
• 11:00 Axions: Diversity beats Simplicity 45'
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.) Material:
• 11:45 Inflation in String Theory 45'  Speaker: Dr. Gary Shiu (U. of Wisconsin) Material:
• 12:45 - 14:00 Lunch ( Cafeteria )
• 14:00 - 15:25 parallel 2: D2:LHC Special Session  Conveners: Pyungwon Ko (Chair), Ki-Young Choi (Convener) Location: 104
• 14:00 Overview of Dark Matter searches and status in run2 at the CMS experiment 35'  Speaker: Dr. DongHee Kim (Kyungpook National Univ.) Material:
• 14:35 The ATLAS detector: status and performance in run2 25'  Speaker: Dr. Steven Schramm (CERN) Material:
• 15:00 Overview of Dark Matter searches at the ATLAS experiment 25'  Speaker: Dr. Bernhard Meirose (U.T. Dallas) Material:
• 14:00 - 15:40 Parallel 1: A2  Conveners: Hyun Min Lee (Chair), Jinn-Ouk Gong (Convener) Location: 103
• 14:00 Gravitational waves from cosmic bubble collisions 25'  Speaker: Dr. Dong-Hoon Kim (Ewha Womans University) Material:
• 14:25 Quantum Scalar Corrections to the Newtonian Potential on de Sitter Background 25'  Speaker: Dr. Sohyun Park (KASI) Material:
• 14:50 Fermionic Schwinger Current in 4-d de Sitter Spacetime 25'  Speaker: Mr. Takahiro Hayashinaka (RESCEU, The University of Tokyo) Material:
• 15:15 Will quantum cosmology resurrect chaotic inflation model? 25'  Speaker: Dr. Sang Pyo Kim (Kunsan National Univ.) Material:
• 15:25 - 15:45 Break ( )
• 15:40 - 16:00 Break ( )
• 15:45 - 17:50 parallel 2: D3  Conveners: Xiao Gang He (Chair), Ki-Young Choi (Convener) Location: 104
• 15:45 The e+e- collider experiments to search for dark matter 25'  Speaker: Dr. Kihyeon Cho (KISTI) Material:
• 16:10 Exploring top quark FCNC at hadron colliders in association with flavor physics 25'  Speaker: Dr. Yeo Woong Yoon (Konkuk Univ.) Material:
• 16:35 New resonance shapes of heavy Higgs bosons due to interference with the continuum background 25'  Speaker: Dr. Jenghyeon Song (Konkuk Univ.) Material:
• 17:00 Beyond the Dark matter effective field theory and a simplified model approach at Colliders 25'  Speaker: Dr. Myeonghun Park (CTPU/IBS) Material:
• 17:25 Gravitational Compton scattering from the worldline formalism 25'  Speaker: Dr. Naser Ahmadiniaz (CoReLS/IBS) Material:
• 16:00 - 17:40 Parallel 1: A3  Convener: Jinn-Ouk Gong (Chair, Convener) Location: 103
• 16:00 Classically Scale Invariant Inflation, WIMPzilla, and (A)gravity 25'  Speaker: Dr. Arsham Farzinnia (CTPU/IBS) Material:
• 16:25 Reheating the Universe at Criticality 25'  Speaker: Dr. Hyun Min Lee (Chung-Ang University) Material:
• 16:50 Primordial gravitational waves from the space-condensate inflationary model 25'  Speaker: Mr. Gansukh Tumurtushaa (Sogang Univ.) Material:
• 17:15 Aligned natural inflation and oscillatory feature in primordial power spectrum 25'  Speaker: Mr. Hyungjin Kim (KAIST) Material:
• Friday, 16 October 2015
• 09:00 - 11:45 Plenary Session  Convener: Sang Pyo Kim (Chair)
• 09:00 From CMB Observations to Inflation 45'
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) Material:
• 09:45 Quantum Primordial Standard Clocks 45'
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) Material:
• 10:30 Break 30'
• 11:00 Gravitational waves from the early Universe 45'
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
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