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 2022학년도 1학기 콜로퀴움 일정 2022.01.10 3575
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 817296
568 <Oct. 18(Wed.) 4:30 PM> AlGaN/GaN HEMT 센서플랫폼 (KANCSensGaNTM) 기술 소개 file 2017.10.11 43553
567 <Oct. 11(Wed.) 4:30 PM> Graphene Membrane for Imaging Molecular Assembly and Dynamics 2017.09.27 43556
566 <8/21(Mon.)10:30>Non-Gaussianity as a Particle Detector 2017.08.17 43628
565 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 43718
564 <Sept.11(Wed.)> Fantastic physics and materials, how to find them? 2019.09.06 43993
563 <2/8(Fri) 11:0 am ~ >Intertwined states in the pure and Nd-doped heavy fermion superconductor CeCoIn5 2019.02.08 44342
562 <11/23(Fri.) 11:00am>Barrier-bound States in Flat-band Systems 2018.11.19 44419
561 <May.9(Wed.) 4:30 PM> "How gold was produced in the universe?" 2018.05.02 44571
560 <9/17(Tue) 4:00 pm ~ >Dynamics of multiple-Q spin textures and its effect on electronic state 2019.09.10 44587
559 <Mar.20(Wed.)> Connecting Thermoelectricity and Superconductivity by Pressure Bridge 2019.03.13 44825
558 <8/2(Thu.) 2:00pm>Status of multifractional theories 2018.07.24 44873
557 <April.4(Wed.) 4:30 PM>From Static to Dynamic Multiferroics 2018.03.29 44894
556 <Dec.13(Wed.) 4:30 PM>기본에 충실하고 새로움에 도전한다 - 자율주행자동차의 핵심 기술들 – 2017.12.07 45221
555 <3/2(Fri.)11:00>Evolving magnetic interactions near a Kondo breakdown 2018.02.27 45266
554 <4/5(Wed.) 18:00pm> 저에너지 가속기의 활용 2017.04.05 45348
553 <12/6(Fri.)>topological phase transitions in Kitaev quantum spin liquids. 2019.12.04 45643
» <6/11(Mon.)3:30pm> Spontaneous Leptogenesis in Continuum-Clockwork Axion Models 2018.06.08 45694
551 <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 45834
550 <June 7(Wed.) 4:30 PM> 물리학으로 보는 인간과 사회 2017.05.31 45978
549 <10/22(Tue.)>To p or not to p? – 17O NMR of Sr2RuO4 under strain file 2019.10.17 46111