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
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
373 2019-07-08 14:00    Ultrabroadband squeezed pulses and their relation to relativity file
372 2019-07-10 16:00    Public Lectures file
371 2019-07-16 16:00    2019 Physics Distinguished Lecture file
370 2019-07-21 12:00    Challenges and Opportunities in Theoretical Particle Physics 2019 file
369 2019-07-25 16:00    Band topology of twisted bilayer graphene file
368 2019-07-30 16:00    Dirac fermions and flat bands in correlated kagome metals file
367 2019-07-31 16:00    Features of ballistic superconducting graphene file
366 2019-08-01 14:00    Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
365 2019-08-06 16:00    Visualization of in-plane piezoresponse vector fields file
364 2019-08-14 16:00    Quantum Optics, at the heart of quantum metrology and quantum information file
363 2019-08-16 14:00    Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
362 2019-08-19 10:00    Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file
361 2019-08-22 16:00    Physics and Applications in Nanoelectronics and Nonomechanics file
360 2019-08-27 16:00    Critical current properties of Fe-based superconductors file
359 2019-09-02 16:00    Fall 2019: Physics Colloquium file
358 2019-09-10 15:00    (2+1) D Duality Web from 3D Euclidean Lattice file
357 2019-09-10 15:00    Two-Stage Kondo Effect file
356 2019-09-18 16:00    Exploring Synthetic Quantum Matter in Superconducting Circuits file
355 2019-09-18 16:00    Fall 2019: Physics Seminar Serises file
354 2019-09-26 16:00    Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file