2021 NRF-JSPS Workshop in particle physics, cosmology, and gravitation

20 - 22 July 2021, Alpensia Resort, Pyeongchang, Korea / online

Organizer

Ki-Young Choi (SKKU), Jinn-Ouk Gong (Ewha, chair), Jong-Chul Park (Chungnam Nat), Tomo Takahashi (Saga, chair)

Goal

Based on the NRF-JSPS bilateral program, Korean and Japanese researchers meet together to bring their idea and to discuss recent topics in particle physics, cosmology, and gravitation to promote future collaborations.

Participants

• Korean side

Ki-Young Choi (SKKU), Jinn-Ouk Gong (Ewha), Kwang Sik Jeong (Pusan Nat, online), Sunghoon Jung (Seoul Nat, online), Heejung Kim (CTPU-IBS), Jongkuk Kim (KIAS), Suro Kim (KIAS), Seoktae Koh (Jeju Nat), Jong-Chul Park (Chungnam Nat), Rathul Nath Raveendran (SKKU, online), Chang Sub Shin (CTPU-IBS)

• Japanese side (all online)

Luca Buoninfante (TiTech), Asuka Ito (TiTech), Sravan Kumar Korumilli (TiTech), Osamu Seto (Hokkaido), Yuichiro Tada (Nagoya), Tomo Takahashi (Saga), Masahide Yamaguchi (TiTech), Shuichiro Yokoyama (Nagoya), Chul-Moon Yoo (Nagoya), Ying-li Zhang (Tongji)

Program (subject to change)

• 7/20 (Tue)

14:00 - 16:00 (Chair: Jinn-Ouk Gong)

1. Masahide Yamaguchi: Higher derivative extension of disformal transformation

2. Sunghoon Jung: Hubble Selection of the Weak Scale from QCD Quantum Phase Transition

3. Rathul Nath Raveendran: Quantum-to-classical transition in single and two field models of inflation

16:00 - 16:30: Tea break

16:30 - 18:30 (Chair: Ki-Young Choi)

1. Ying-li Zhang: From the merger rate of Primordial Black Hole Binaries to the Primordial Power Spectrum of curvature perturbation

2. Luca Buoninfante: Unitarity in nonlocal quantum field theories

3. Suro Kim: Perturbative unitarity in quasi-single field inflation

• 7/21 (Wed)

10:00 - 12:00 (Chair: Kwang Sik Jeong)

1. Shuichiro Yokoyama: Cosmic Birefringence by the Inflaton

2. Sravan Kumar Korumilli: R^2 gravity, Non-locality and Inflation

3. Heejung Kim: Cosmological and structure-formation imprints of elastic/inelastic processes among dark-sector particles

12:00 - 14:00: Lunch

14:00 - 16:00 (Chair: Jong-Chul Park)

1. Asuka Ito: Axion dark matter search with magnons

2. Jongkuk Kim: Dispersions of neutrinos in dark matter

3. Chang Sub Shin: Cooling of young neutron stars and dark gauge bosons

16:00 - 16:30: Tea break

16:30 - 18:00 (Chair: Seoktae Koh)

1. Yuichiro Tada: Primordial black holes in peak theory with a non-Gaussian tail

2. Chul-Moon Yoo: Axion Cloud Decay due to the Axion-photon Conversion with Background Magnetic Fields

• 7/22 (Thu)

10:00 - 12:00 (Chair: Tomo Takahashi)

1. Osamu Seto: Extra radiation, BBN and Hubble tension

2. Jong-Chul Park: Cosmic-Neutrino-Boosted Dark Matter

3. Ki-Young Choi: Reconstructing inflationary potential from power spectrum

Practical details

• The accommodation is subsidized and costs 164,000 KRW per person for 2 nights. (Korea Teacher's Cretit Union price) 2 off-line participants are to share 1 condo, which is equipped with 2 separate bedrooms and bathrooms. The check-in and check-out are respectively 15:00 and 11:00.

• A free resort shuttle bus runs between KTX Jinbu station and the resort 4 times a day. The departure time at the Jinbu station is 11:00, 13:00, 15:00 and 17:00. More detail can be found at the resort homepage.