[HET seminar] Black holes as detectors for ultralight bosons

by Yifan Chen (NBIA)

Thursday 17 Aug 2023, 11:00 → 12:30 US/Eastern

https://bnl.zoomgov.com/j/1605999124?pwd=eCs3M0t2eGtiL0dyMGNoUDIzamxqQT09

Also in small seminar room.

Abstract: Ultralight bosons exhibit wave behavior when their occupation number is high. Their interaction with the Standard Model particles physics can engender a tiny detectable signal, characterized by the oscillatory boson background. In the vicinity of a rapidly rotating black hole, ultralight bosons falling within a specific mass range accumulate via superradiance, resulting in a high field value potentially approaching the Planck scale. The talk will cover some examples of consequences, including axion-induced birefringence, gravitational deflection of photon geodesics, and parametric production of neutrino fluxes.

UBBH_bnlth.pdf