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
297 2019-12-13 13:30    Biophysics Mini-symposium at KAIST file
296 2019-12-18 16:00    Road to Higher Tc Superconductivity file
295 2019-12-27 15:00    The superconducting order parameter puzzle of Sr2RuO4 file
294 2019-12-27 15:00    The superconducting order parameter puzzle of Sr2RuO4 file
293 2020-01-17 16:00    Symmetry Breaking and Topology in Superfluid 3He file
292 2020-02-12 13:00    From inflation to new weak-scale file
291 2020-02-13 16:30    Enhanced Light-Matter Interactions in Graphene with Noble Metal Plasmonic Structures file
290 2020-02-20 16:00    Unconventional superconductivity in the locally non-centrosymmetric heavy-fermion CeRh2As2 file
289 2020-07-02 16:00    An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
288 2020-08-17 20:00    Using magnetic tunnel junctions to compute like the brain file
287 2020-08-25 20:00    KAIST Global Forum for Spin and Beyond (Second Forum) file
286 2020-09-11 14:00    SRC Seminar file
285 2020-09-14 17:30    KAIST Global Forum for Spin and Beyond (Third Forum) file
284 2020-09-22 09:30    Physics and applications of soliton microcombs(Quantum- & Nano-Photonics) file
283 2020-09-24 09:00    (CAPP/IBS)Searching for Dark Matter with a Superconducting Qubit , Cryogenic Microwave Circuit Development at the NSTU file
282 2020-09-28 17:30    KAIST Global Forum for Spin and Beyond(Fourth Forum) file
281 2020-10-09 09:00    Quantum Many-Body Simulation file
280 2020-10-15 16:00    Graphene-based Josephson junction microwave bolometer file
279 2020-10-15 16:00    Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
278 2020-10-15 17:00    Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe file