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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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240 2018-10-15 16:00  #1323, E6-2  Universal properties of macroscopic current-carrying systems file
239 2016-09-02 16:00  E6-2(1st fl) #1323  Quantum Electrical Transport in Topological Insulator Nanowires
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235 2015-12-01 16:00  E6-2, #1323  Introducing extra dimensions to spectroscopic studies of advanced quantum materials
234 2015-11-10 16:00  E6-2, #1323  Rapid heating of matter using high power lasers
233 2022-11-10 16:00  E6-2. 1st fl. #1323  Probing the Origin of Cosmic Infrared Background and Future Prospects with SPHEREx
232 2023-02-28 11:00  E6 Room(#1322)  Topotactic redox engineering toward novel material file
231 2018-10-16 10:00  #1323, E6-2  Capturing protein cluster dynamics and gene expression output in live cells file
230 2018-06-18 10:00  E6-2. 2nd fl. #2502  Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file
229 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
» 2023-09-26 16:00  E6-2, #2502  [High Energy Theory Seminar]A new step in interacting dark sector cosmologies
227 2016-03-11 16:00  E6-2. 1st fl. #1501  Jan. Switching handedness of of chiral solitons in Z4 topological insulators
226 2021-04-02 14:30  Online(Zoom)  Quantum computing and entanglement generation using trapped ions and photons
225 2021-05-14 14:30  Online seminar  Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file