logo

korean english

게시판

Home > 게시판 > 세미나

천체입자물리 및 우주론 이론 연구실(최기영 교수님)에서 IBS 순수물리이론연구단의 신창섭 박사님을 초청하여 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁드립니다.



Time: 3:30 pm on June 11, 2018(Monday)

Place: Seminar Room of Basic Science Institute (31317 on the 3rd floor)

Speaker: Dr. Chang Sub Shin (IBS 순수물리이론연구단)

Title: Spontaneous Leptogenesis in Continuum-Clockwork Axion Models


Abstract: The mechanism of spontaneous leptogenesis” — in which the matter-antimatter asymmetry is generated via motion of a scalar field coupled to the electroweak gauge bosons provides an interesting alternative to more traditional thermal leptogenesis models. While an axion-like field is a natural candidate for these models, the observed asymmetry requires an axion mass so large it decays shortly after leptogenesis. In this talk, we demonstrate how effective axion potentials that arise from continuum clockwork models can yield simultaneously sufficient production of baryon asymmetry, and a stable dark matter candidate with the appropriate abundance. Moreover, we find non-trivial dynamics early in the axion field evolution which exhibit a tracking behavior similar to that found in quintessence models where the axion follows a radiation-like equation of state before undergoing coherent oscillations. As a result of these dynamics, axion-photon isocurvature perturbations are generically suppressed, thereby enlarging the viable parameter space for our model.

 


번호 제목 날짜 조회 수
공지 2020학년도 2학기 콜로퀴움 일정 2020.07.16 25960
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 559774
90 <May.16(Wed.) 4:30 PM> Single crystal growth of metal film and metal oxide film on different substrates and their various applications 2018.05.09 28917
89 <May.23(Wed.) 4:30 PM> 한국 희귀동위원소과학 프로젝트(Rare Isotope Science Project in Korea) 2018.05.16 26960
88 <May.30(Wed.) 4:30 PM> 구리산화물 고온 초전도체의 특성과 응용 2018.05.23 27315
» <6/11(Mon.)3:30pm> Spontaneous Leptogenesis in Continuum-Clockwork Axion Models 2018.06.08 24698
86 <6/15(Fri.) ~ 16(Sat.)> Formation of first star and galaxy, Gravitational waves from Binary Mergers of Sub-Solar Mass Dark Black Holes 2018.06.12 24961
85 <6/21(Thu.) ~ 22(Fri.)>Mini-workshop for the entanglement entropy at SKKU 2018.06.18 25134
84 2018학년도 2학기 콜로퀴움 일정 2018.07.03 93223
83 <7/11(Wed.) 3:00pm> Traversable wormholes: two-dimensional example 2018.07.09 24024
82 <7/20(Fri.) 4:00pm>Manufacturing next generation cryogen-free 1.5T MRI and cryogen-free NMR 2018.07.16 28146
81 <8/1(Wed.) 4:00pm>Band Topology in Nodal Line Semimetals with Z2 Monopole Charges 2018.07.23 24278
80 [8/1(Wed.), 8/2(Thu)] Lectures on gravitational waves 2018.07.24 24225
79 <8/2(Thu.) 2:00pm>Status of multifractional theories 2018.07.24 25179
78 <8/23(Thu.) 2:00pm>What will we do with near-term quantum computers? 2018.08.17 24420
77 <8/24(Fri.) 3:30pm>Secret interactions of light sterile neutrinos with the DSNB 2018.08.21 24236
76 <Sep.12(Wed.) 4:30 PM> Functional Nanomaterials for Energy Harvesting 2018.09.05 30166
75 <Sep.19(Wed.) 4:30 PM> Superconducting Quantum Computing (초전도 양자컴퓨팅) 2018.09.12 28083
74 <Oct.10(Wed.) 4:30 PM> Standard Model of Cosmology and Beyond 2018.09.21 27412
73 <Oct.17(Wed.) 4:30 PM> CMS 실험에서의 Machine Learning활용 2018.10.12 26952
72 <10/18(Thu.) 1:30pm>Machine Learning Approaches for Solving Physics Problems: Usability of Experimental Data 2018.10.15 24630
71 <Oct.31(Wed.) 4:30 PM> 산업에서 활용되는 수학의 세계, 산업수학이란? 2018.10.22 25100