REMINDER - High Energy Physics Seminars this week (Pablo Bueno and Ranjan Laha)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_**__*


*Tuesday, 26 August *2025, at *16:00* - *Stasi Seminar Room****- 
https://indico.ictp.it/event/11085/*


Pablo Bueno (Universidad de Barcelona)

*“Dynamical Formation of Regular Black Holes"*
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_Abstract_
I will show that regular black holes arise as the unique spherically 
symmetric solutions of broad families of generalizations of Einstein 
gravity involving infinite towers of higher-curvature corrections in D≥5 
spacetime dimensions. Our results are facilitated by the use of a class 
of theories that possess second-order equations on spherically symmetric 
metrics, but which are general enough to provide a basis for the 
gravitational effective action. I will argue that such regular black 
holes arise as the byproduct of gravitational collapse within these 
theories. Generically, spherical stars or shells collapse until they 
reach a minimum size inside the inner horizon of the black hole they 
create. Then, they bounce back and reappear through a white hole in a 
different universe, where they eventually reach their original size, 
restarting the process. I will also mention several ongoing research 
directions.

To attend via _*Zoom*_, *please _register_ here*:
https://zoom.us/meeting/register/Cok0rQvGSmW0M_B9jckuYQ

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*Thursday, 28 August *2025, at *16:00* - *Stasi Seminar Room****- 
https://indico.ictp.it/event/11086/*


Ranjan Laha (CHEP - Indian Institute of Science, Bengaluru)


*“Search for Dark Matter Over a Wide Mass Range: Using JWST and Neutrino 
Telescopes to Search for Non-Gravitational Signatures of Dark Matter "*

_Abstract_
In this talk, I will discuss two different ways to search for dark matter.
In the first part of my talk, I will discuss how one can use the JWST 
data to probe eV-scale QCD axion dark matter or axion-like particle dark 
matter.  These dark matter particles can decay into two photons in the 
infrared band. This will produce a distinct line signature in the 
spectroscopic observations made by JWST. Using the latest NIRSpec IFU 
spectroscopic observations from JWST, we put some of the strongest bound 
on the photon coupling for QCD axion/ ALP DM in the mass range between 
0.47 and 2.55 eV.
In the second part of my talk, I will discuss how neutrino telescopes 
like IceCube and Super-Kamiokande can probe dark matter - electron 
scattering.  Dark matter (with masses greater than about 4 GeV) can get 
captured inside the Sun due to dark matter - electron scattering and the 
captured dark matter can annihilate into neutrinos and anti-neutrinos.  
Using up-to-date measurements by the IceCube neutrino telescope and 
Super-Kamiokande, we set the world's strongest limit on dark matter - 
electron scattering for dark matter masses between 10 GeV to about 10^5 
GeV..

To attend via _*Zoom*_, *please _register_ here*:
https://zoom.us/meeting/register/ZJWO6FAHTBq8XPifgr63Xw