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SUMMARY:Near-horizon Collisions at the Extreme: Naturalness and Observabil
 ity of Critical Near-horizon Collisions around  Near-extremal Black Holes
DTSTART:20261020T124500Z
DTEND:20261020T140000Z
DTSTAMP:20261021T124300Z
UID:indico-event-17573@indico.math.cnrs.fr
CONTACT:cecile@ihes.fr
DESCRIPTION:Speakers: Delilah Gates (Harvard University\, USA)\n\nSéminai
 re Amplitudes et Gravitation sur l'Yvette (IHES/IPhT)\nIn principle\, rapi
 dly rotating black holes could naturally act as particle colliders because
  geodesics particles that collide can exhibit center-of-mass (CM) energies
  that diverges in the limit that the black hole approaches extremality and
  the collision radius approaches the horizon\, provided that one particle 
 has a critically tuned angular momentum. In this talk\, I present work to 
 understand the naturalness and observability of these critical-particle co
 llisions around near-extremal BHs. I will highlight 1) the landscape of co
 nditions under which these critical-particle collisions occur\, 2) the CM 
 energy achievable for critical-particle collision where one particle falls
  from in from infinity and the other particle is part of an accretion disk
 \, and 3) the observability as measure by the escape probability and expec
 ted energy of emission born of a critical-particle collision.\n \nPour ê
 tre informé des prochains séminaires vous pouvez vous abonner à la list
 e de diffusion en écrivant un mail à sympa@listes.math.cnrs.fr avec comm
 e sujet: "subscribe seminaire_physique PRENOM NOM"(indiquez vos propres pr
 énom et nom) et laissez le corps du message vide.\n\nhttps://indico.math.
 cnrs.fr/event/17573/
LOCATION:Amphithéâtre Léon Motchane (IHES)
URL:https://indico.math.cnrs.fr/event/17573/
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