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 27346
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 970558
600 <9/17(Tue) 4:00 pm ~ >Dynamics of multiple-Q spin textures and its effect on electronic state 2019.09.10 53511
599 <Sept.11(Wed.)> Fantastic physics and materials, how to find them? 2019.09.06 59303
598 <9/2(Mon) 15:00 ~ >Status of the KM3NeT Deep Sea Neutrino Telescope 2019.08.26 57251
597 <8/30(Fri) 16:00 ~ >Structures of light neutron-rich nuclei, 17,19C 2019.08.22 55370
596 <8/26(Mon) 14:00 ~ >Constructing viable models of bouncing scenarios 2019.08.20 49051
595 <8/19(Mon) 13:30 ~ >Detection of cosmic rays in the PeV to EeV energy range file 2019.08.16 59365
594 <8/14(Wed.)>3D-strain induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach 2019.08.13 55054
593 <8/19(Mon) 14:00 ~ >Exploring topological matter in an atomic quantum simulator file 2019.07.26 57843
592 2019학년도 2학기 콜로퀴움 일정 2019.07.17 416249
591 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 81311
590 <June.5(Wed.)> Fluid gravity duality 2019.05.29 50317
589 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 57444
588 <May.15(Wed.)> Three-body problems and three-body forces in Classic and Quantum Systems 2019.05.08 52850
587 <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 68328
586 <May.8(Wed.)> Genesis of Matter 2019.05.01 39669
585 <May.1(Wed.)> Introduction of AMS Application 2019.04.24 47879
584 <April.17(Wed.)> Emerging Artificial Synapse for Learning- and Energy-Efficient Neuromorphic System 2019.04.11 66192
583 <April.10(Wed.)> 자성 반데르발스 물질 발견과 전망(Discovery and Perspective of magnetic van der Waals materials) 2019.04.04 43368
582 <April.3(Wed.)> 전자구조계산을 이용한 새로운 양자물질 연구 2019.03.27 42008
581 <Mar.27(Wed.)> Ultrafast Movie Maker for Photo-induced Dynamics: Ultrafast Electron Microscope 2019.03.20 72302