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
226 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
225 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
224 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
223 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
222 2020-11-17 12:00  Online(Zoom)  Quantum- & Nano-Photonics" 세미나 시리즈 file
221 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
220 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
219 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
218 2020-12-02 10:00  Zoom  Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
217 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
» 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
215 2020-12-11 14:30  online  Antisymmetric interlayer exchange coupling in magnetic multilayers
214 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
213 2020-12-23 10:00  Online  Online workshop for Quantitative Phase Imaging file
212 2021-01-28 15:00  Zoom  Topological Transport of Deconfined Hedgehogs in Magnets file
211 2021-01-28 18:00  Online Seminar  Quantum metamaterials: concept, theory, prototypes and possible applications file
210 2021-02-02 14:30  Zoom  Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
209 2021-02-15 17:00  Zoom  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
208 2021-02-17 09:00  Online  석학 대중 강연 및 강의 시리즈 file
207 2021-03-02 16:00  Online  Sensitive terahertz detection with graphene-based transistors file