Projecting Cosmological Problems on the Story of Gravitinos

by Dr Gongjun Choi (Tsung-Dao Lee Institute)

Tuesday 13 Apr 2021, 10:00 → 11:00 Asia/Shanghai

Tsung-Dao Lee library/Fourth Floor-410 - 410# Meeting Room (Tsung-Dao Lee Library)

Abstract: 

In this talk, we discuss interesting potential implications for the supersymmetric (SUSY) universe in light of cosmological problems on (1) the number of the satellite galaxies of the Milky Way (missing satellite problem) and (2) a value of the matter density fluctuation at the scale around 8Mpc h^-1 (S8 tension). The implications are extracted by assuming that the gravitino of a particular mass can be of help to alleviate the cosmological tensions. We consider two gravitino mass regimes vastly separated, that is, 100eV and 100GeV. We discuss non-trivial features of each supersymmetric universe associated with a specific gravitino mass by projecting potential resolutions of the cosmological problems on each of associated SUSY models.

Biography:

http://tdli.sjtu.edu.cn/CN/people/middle/36?type=POSTDOC_FELLOW

Online Meeting room: https://zoom.com.cn/j/93579891950

Password: 123456

Gongjun Choi (two gravitinos).pdf