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날짜 2023-09-26 16:00 
일시 Sep 26(Tue), 4PM 
장소 E6-2, #2502 
연사 Dr. Taewook Youn (Cornell-Korea U Joint Postdoc) 
We are delighted to announce the upcoming High-Energy Theory Seminar by Dr. Taewook Youn (Cornell-Korea U Joint Postdoc).
The seminar will take place today at 4PM at E6-2, #2502 and you are all invited to participate. 
 
Speaker: Dr. Taewook Youn (Cornell-Korea U Joint Postdoc)
Time: Today, 4PM
Place: E6-2, #2502
 

Title: A new step in interacting dark sector cosmologies

 

Abstract: With the growing precision of cosmological measurements, tensions in the determination of cosmological parameters have arisen that might be the first manifestations of physics going beyond Lambda CDM. We propose a new class of interacting dark sector models, which lead to qualitatively new cosmological behavior, which can potentially simultaneously address the two most important tensions in cosmological data, the H0 and S8 tensions. The main ingredient in this class of models is multi-component interacting dark radiation, with at least one of the components having a light mass and transitioning to non-relativistic close to the time of matter-radiation equality, and interactions between this massive dark radiation component and a fraction of dark matter. This generalizes the scenario known as Partially Acoustic Dark Matter, in which a fraction of dark matter has strong interactions with dark radiation throughout most of the universe evolution. By introducing a mass-threshold for dark radiation, in which the component that interacts with dark matter becomes non-relativistic and quickly annihilates into the massless component, we achieve two goals, each of them helping improve one of the aforementioned tensions and leaving the power spectrum identical to Lambda CDM at larger scales.

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224 2019-05-01 16:00  #1323, E6-2  Raman and x-ray scattering study on correlated electron systems: two case examples file
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220 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file
219 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
218 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
217 2019-04-04 16:00  #1323, E6-2  Chiral spin-photon interaction at nanoscale file
216 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
215 2019-03-29 14:30  E6-2. 1st fl. #1323  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
214 2019-03-26 15:00  E6-2. 2st fl. #2501  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
213 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
212 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
211 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
210 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
209 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file
208 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
207 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file