visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-12-10 13:55 
연사  
장소 Zoom 

Title : Consistency of Boltzmann equation and light dark matter from inflaton decay 

 
Speaker: Dr Yin Wen (University of Tokyo)

 

Abstract:
Boltzmann equation plays important roles in particle cosmology in studying the evolution of distribution functions (also called as
occupation numbers) of various particles. For the case of the decay of a scalar condensation into a pair of scalar particles, we
point out that the system may not be well described by the Boltzmann equation when the occupation number of daughter particles becomes large even in the so-called narrow resonance regime.
In the second part, I will show a new simple mechanism for the light dark matter (DM) production from the decay of the oscillating
inflaton condensation. If the reheating temperature after inflation is higher than the inflaton mass, which is of the same order of the momentum of the DM at the time of the production, the DM momentum can be suppressed compared to the temperature of the thermal plasma if the interaction of the DM is weak enough. In addition, the DM can be abundant enough.

 

Zoom Link:
Time: Dec 10, 2020 01:55 PM Seoul

 

 

Meeting ID: 875 7667 2928
Passcode: 028371
번호 날짜 연사 제목
550 2023-05-19 11:00    (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
549 2015-10-14 18:00    인터스텔라 영화 속의 물리 file
548 2022-03-28 16:00    Ultimate-density atomic semiconductor via flat bands
547 2009-09-07 16:00    Physics Colloquium : 2009 Fall file
546 2018-11-08 16:00    Conformality lost file
545 2017-03-06 16:00    Spring 2017: Physics Colloquium file
544 2014-05-28 17:00    부품소재산업이 미래다
543 2022-11-25 11:00    [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations file
542 2022-03-21 16:00    Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
541 2023-03-16 16:00    (광학분야 세미나) Investigation of 3D cell mechanics using refractive-index tomography
540 2024-10-17 16:00    Photonic Methods for Quantum Levitodynamics Beyond the Rayleigh Regime
539 2018-08-01 11:00    Future of AI: Is the brain a computer? file
538 2022-09-23 11:00    [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions file
537 2020-09-11 14:00    SRC Seminar file
536 2023-03-17 11:00    (응집물리 세미나)Operando electron microscopy investigation of domain dynamics in twisted van der Waals materials file
535 2022-12-07 16:00    (광학분야 세미나) Non-Hermitian physics and non-Hermitian singularity
534 2022-05-02 16:00    What can we learn from the history of science and technology?(우리말강의)
533 2022-04-28 16:00    (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
532 2025-01-23 14:00  여영기 박사  Complete Polytype switching by super lubricant van der Waals cavity arrays file
531 2024-04-19 15:00    Engineering Physics for Semiconductor Equipment Innovation file