장소 | Zoom |
---|---|
일시 | Dec.10(Thu), 01:55 PM |
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
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
68 | Nov. 28 (Tue.), 4:00 PM | #1323 (E6-2. 1st fl.) | Samindranath Mitra, Editor at Physical Review Letters |
Physics after the lab and the desk: Your work in PRL
![]() |
67 | 2015/07/16-07/17 | E6-2, 1501 | Sang-Wook Cheong (Rutgers Univ.) | KAIST Physics Distinguished Lecture |
66 | Nov. 2(Tue) 04:00pm | 자연과학동(E6-2) #1323 | Sangjin Lee(IBS-CALDES) |
Metrology of Band Topology via Resonant Inelastic X-ray Scattering
![]() |
65 | 2016/09/29-12/13 | E6-2, #1323 | Sangyoon Han 외 |
2016 Fall, Physics Seminar Serises
![]() |
64 | February 20 (Thu), 4:00 PM | #1323, E6-2 | Seunghyun Khim |
Unconventional superconductivity in the locally non-centrosymmetric heavy-fermion CeRh2As2
![]() |
63 | Jan. 11th(Tue), 15:00 | E6 #1501 | Soyeun Kim(UIUC) |
Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I
![]() |
62 | June 23th (Thur), 11:00 | E6 Room(#1322) | Sun Yool Park(Joint Institute for Laboratory Astrophysics (JILA) & University of Colorado) |
JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model
![]() |
61 | July 8(Mon), 14:00 | E6, #1322 | T. L. M. Guedes (Univ. of Konstanz) |
Ultrabroadband squeezed pulses and their relation to relativity
![]() |
60 | Sep. 14(Mon) 17:30~ | Zoom webinar | Teruo Ono (Kyoto U. Japan) |
KAIST Global Forum for Spin and Beyond (Third Forum)
![]() |
59 | Jun 8 (Tue), 10:00 AM | Zoom webinar | Toshihiko Baba (Yokohama National University, Japan) |
Photonic crystal devices for sensing
![]() |
58 | Jun 22(Tue) 17:00 | Zoom webinar | Wei Han (Peking University, China) |
Spintronics meets Quantum Materials
![]() |
57 | DEC. 26 (Wed), 04:00 PM | E6-1. 3rd fl. #3434 | Y. Kim, A. Go, K. Hwang and E.-G. Moon |
Informal Workshop on Topology and Correlation
![]() |
56 | Jan.28(Thu), 03:00PM | Zoom | Yaroslav Tserkovnyak (UCLA) |
Topological Transport of Deconfined Hedgehogs in Magnets
![]() |
55 | 2016/09/05-12/12 4PM | Natual Scien Bldg.(E6)m #1501 | Yeong Kwan Kim 외 |
Physics Colloquium : 2016 Fall
![]() |
» | Dec.10(Thu), 01:55 PM | Zoom | Yin Wen (University of Tokyo) | Consistency of Boltzmann equation and light dark matter from inflaton decay |
53 | 2012/04/02, 4PM | E6, 1501 | Yong Hee Jeong | A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4 |
52 | Feb.15(Mon), 05:00PM | Zoom | Yoshichika Otani(Tokyo Univ.) |
Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets
![]() |
51 | Jun. 14 (Tue) 4PM | Seminar Room (#2502, 2nd fl.) | Young-Sik Ra, Université Pierre et Marie Curie | Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction |
50 | Jan. 18(Tue), 2pm-3pm | KI bldg. 5th fl. Room B501 & Zoom | YoungJu Jo (Stanford University) |
Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo
![]() |
49 | 2013/03/11-06/10 | E6, 1501 | 강명수교수(KAIST) 외 | Physics Colloquium : 2013 Spring |