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날짜 2023-09-13 16:00 
일시 Sep.13 (Wed), 4PM 
장소 E6-2, #2502 
연사 Sung Mook Lee (KAIST) 
We are delighted to announce the upcoming High-Energy Theory Seminar by Dr. Sung Mook Lee who joined KAIST recently as a postdoctoral fellow.
The seminar will take place today Wednesday (Sep 13) at 4PM at E6-2, #2502 and you are all invited to participate. 
 
Speaker: Sung Mook Lee (KAIST)
Time: Today, September 13 (Wednesday), 4PM
Place: E6-2, #2502
 
Title: Cosmic Birefringence from Dark Photon
 
Abstract:
Recent findings of isotropic cosmic birefringence within CMB have sparked interest in exploring potential indications of parity violation in our universe. The prevailing interpretation is the existence of an axion background, a concept I will briefly review. On the other hand, my focus in this presentation will be the intriguing possibility of kinetic mixing between the CMB photons and birefringent dark photons as the underlying cause of cosmic birefringence. During this discussion, I will demonstrate that indeed the birefringence of the dark photons can influence the polarization of CMB photons even though this effect may not be uniformly distributed. Furthermore, our result sheds light on the pivotal role played by kinetic mixing in generating two fundamental attributes of the CMB: circular polarization and spectral distortion. This presentation is based on 2307.14798.
번호 날짜 장소 제목
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553 2017-12-14 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  Exploring the Universe via GWs in the era of multi-messenger astronomy
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549 2018-09-20 16:00  #1323, E6-2  Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
548 2019-09-18 16:00  #1323, E6-2  Exploring Synthetic Quantum Matter in Superconducting Circuits file
547 2019-09-10 15:00  #2502, E6-2  (2+1) D Duality Web from 3D Euclidean Lattice file
546 2020-09-28 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond(Fourth Forum) file
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» 2023-09-13 16:00  E6-2, #2502  [High Energy Theory Seminar] Cosmic Birefringence from Dark Photon
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