KIAS HEP-PH Journal Club meeting
by
Online(KIAS)
Online
=============== journal club meeting ===============
Date: Friday 6th May 2022 11:00-12:00 (KST)
Place: online (zoom)
Join Zoom : https://us02web.zoom.us/j/81909682441?pwd=SHRYenRZN2Zwd0tLdjdJc2dtb3FRQT09
Meeting ID : 81909682441
Passcode : 63798375
- Talk Information
Talk1 :
Speaker : Dr. Dibyendu Nanda
Title : CMB pathway to testable non-thermal leptogenesis
Abstract :
I will discuss an interesting clue to probe high scale non-thermal leptogenesis from the measurement of spectral index ($n_s$) and tensor to scalar ratio ($r$) by cosmic microwave background experiments which is otherwise inaccessible to the conventional laboratory experiments. We argue that non-thermal production of baryon (lepton) asymmetry from tree level inflaton decay is sensitive to the reheating dynamics of the Universe after the end of inflation. Such dependence provides detectable imprint on the $n_s-r$ plane which is well constrained by the Planck experiment. We investigate two separate cases, (i) inflaton decays to radiation dominantly and (ii) inflaton does not decay to radiation at tree level. We obtain the corresponding estimates for $n_s$ and $r$ and find the later case to be more predictive in view of recent Planck/BICEP data.
===========lunch polling===============
Lunch menu will be
Please participate in the polling for the options below before 18:00 this Thursday.
Menu:
Vote:
===================================
KIAS official Youtube channel:
https://www.youtube.com/channel/UCDHm-rkJk6lEApBOkj9q-ZQ
KIAS HEP-ph Youtube channel:
https://www.youtube.com/channel/UCVXTeRaZ8oFPEN40IMvgeww
You can find KIAS HEP-ph calendar:
https://indico.kias.re.kr/category/0/calendar
Suro Kim
