visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-12-10 13:55 
일시 Dec.10(Thu), 01:55 PM 
장소 Zoom 
연사 Yin Wen (University of Tokyo) 

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 장소 제목
446 2022-10-13 16:00  E6-2 #1323  (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
445 2018-10-12 16:00  E6-2. 1st fl. #1323  Direct observation of a two-dimensional hole gas at oxide interfaces file
444 2018-10-12 14:30  E6-2. 1st fl. #1323  Quantum Advantage in Learning Parity with Noise file
443 2017-10-10 16:00  E6-2 #1323  Discovery of New 2D Materials with Diverse Physical Properties
442 2016-10-07 16:00  E6-2. #1323(1st fl.)  “Tilt engineering of 4d and 5d transition metal oxides?”
441 2016-10-07 13:30  E6-2. #1323(1st fl.)  “Symmetry and topology in transition metal dichalcogenide?”
440 2020-10-09 09:00  https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09  Quantum Many-Body Simulation file
439 2023-10-04 16:00  E6-2, #2502  [High-Energy Theory Seminar] Moving towards quantum technologies: the case of quantum batteries
438 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
437 2018-11-08 16:00  #1323, E6-2  Conformality lost file
436 2019-11-07 16:00  #1323, E6-2  Integrated quantum photonics with solid-state quantum emitters file
435 2019-11-05 16:00  #1323, E6-2  Study on nanomaterials by the development of ultrahigh resolution laser-photoelectron microscopy (PEEM) file
434 2018-11-29 16:00  #1323, E6-2  양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file
433 2019-11-28 16:00  #1323, E6-2  Generation of coherent EUV emissions using ultrashort laser pulses file
432 2018-11-21 15:00  #1323, E6-2  Engineering topological quantum physics at the atomic scale file
431 2019-11-20 16:00  #5302, E6-2  Correlation between superconducting transition temperature and critical current density in irradiated iron-based superconductors file
430 2019-11-14 16:00  #1323, E6-2  Semi-classical model of polariton propagation file
429 2018-11-01 16:00  #1323, E6-2  Direct holography from a single snapshot file
428 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
427 2022-11-09 16:00  E6-2. 1st fl. #1323  Radio Astronomy, Radio Interferometry, and Multi-wavelength Studies on Relativistic Jets