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Title: Two-loop renormalization of quantum gravity simplified

Journal Article · · Physical Review D
 [1];  [2];  [2];  [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. Stanford Univ., Stanford, CA (United States). SLAC National Accelerator Lab.

The coefficient of the dimensionally regularized two-loop R 3 divergence of (nonsupersymmetric) gravity theories has recently been shown to change when nondynamical three-forms are added to the theory, or when a pseudoscalar is replaced by the antisymmetric two-form field to which it is dual. This phenomenon involves evanescent operators, whose matrix elements vanish in four dimensions, including the Gauss-Bonnet operator which is also connected to the trace anomaly. On the other hand, these effects appear to have no physical consequences for renormalized scattering processes. In particular, the dependence of the two-loop four-graviton scattering amplitude on the renormalization scale is simple. As a result, we explain this result for any minimally-coupled massless gravity theory with renormalizable matter interactions by using unitarity cuts in four dimensions and never invoking evanescent operators.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-76SF00515; SC0009937
OSTI ID:
1355723
Alternate ID(s):
OSTI ID: 1344612
Report Number(s):
SLAC-PUB-16905; PRVDAQ
Journal Information:
Physical Review D, Vol. 95, Issue 4; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (4)

Gauge and parametrization ambiguity in quantum gravity journal January 2018
Inelastic Black Hole Scattering from Charged Scalar Amplitudes text January 2017
Graviton Bending in Quantum Gravity from One-Loop Amplitudes text January 2019
Breakdown of the classical double copy for the effective action of dilaton-gravity at NNLO text January 2019

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