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Title: Black hole induced false vacuum decay: the role of greybody factors

Journal Article · · Journal of High Energy Physics (Online)
ORCiD logo [1];  [2]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
  2. McMaster Univ., Hamilton, ON (Canada); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)

We study false vacuum decay catalyzed by black holes. We consider a toy two-dimensional model of a scalar field with an unstable potential in the background of a dilaton black hole. A realistic black hole in four dimensions possesses the potential barrier for linear field perturbations. We model this barrier — the greybody factor — for spherically-symmetric perturbations in the toy model by adding a coupling between the scalar field and dilaton. We compute analytically the decay rate for the black hole in thermal equilibrium (Hartle-Hawking state) and for the radiating black hole in empty space (Unruh state). Our results show that, contrary to the Hartle-Hawking vacuum, the decay probability of the Unruh vacuum remains exponentially suppressed at all black hole temperatures. We argue that this result holds also in four dimensions.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0011842
OSTI ID:
1905481
Journal Information:
Journal of High Energy Physics (Online), Vol. 2022, Issue 8; ISSN 1029-8479
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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