REMINDER High Energy Theory Colloquium TOMORROW MORNING - Ashoke Sen

[HECAP - Margherita Di Giovannantonio]

*_HECAP THEORY COLLOQUIUM
_*
*_
_*
*
*
*Wednesday, 19*th*March* 2025, at *11:00* - *Budinch Lecture Hall **- 
https://indico.ictp.it/event/10967/*
**

**

Ashoke Sen (ICTS, Bangalore)


*“Gravitational Wave Tails from Soft Theorem**"*
*
*
_Abstract_
If a set of massive objects collide in space and the fragments disperse, 
possibly forming black holes, then this process will emit gravitational 
waves. Computing the detailed gravitational wave-form associated with 
this process is a complicated problem, not only due to the non-linearity 
of gravity but also due to the fact that during the collision and 
subsequent fragmentation the objects could undergo complicated 
non-gravitational interactions. Nevertheless the classical soft graviton 
theorem determines the power law fall-off of the wave-form at late and 
early times, including logarithmic corrections, in terms of only the 
momenta of the incoming and outgoing objects without any reference to 
what transpired during the collision. In this talk I shall explain the 
results and briefly outline the derivation of these results.



_Biosketch:
_
Professor Ashoke Sen received his PhD degree from Stony Brook University 
in 1982 in the field of Theoretical High Energy Physics. After spending 
a few years at Fermilab and SLAC as post-doctoral fellows, he returned 
to India and joined the Tata Institute of Fundamental Research in 1988. 
In 1995 he moved to the Harish-Chandra Research Institute at Allahabad. 
After spending 26 years there, he joined the International Center for 
Theoretical Sciences at Bengaluru in 2021, where he is at present.
Sen has worked on various aspects of string theory and quantum field 
theory. His work includes relation between equations of motion of string 
theory and two dimensional conformal invariance, solution generating 
techniques in string theory, S-duality, black hole entropy, relation 
between F-theory and orientifolds, study of unstable D-branes, string 
field theory, study of non-perturbative effects in string theory etc.

*
*
*
*
*To join via Zoom:*
https://zoom.us/j/94731513033

Meeting ID: 947 3151 3033
Passcode: 029927