Standard model with gravity couplings

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.5682· OSTI ID:284010

Chang, L N ^[1]; Soo, C ^[2]

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1. Department of Physics, Virginia Tech, Blacksburg, Virginia 24061-0435 (United States)
2. Center for Gravitational Physics and Geometry, Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802-6300 (United States)

In this paper we examine the coupling of matter fields to gravity within the framework of the standard model of particle physics. The coupling is described in terms of Weyl fermions of a definite chirality, and employs only (anti-)self-dual or left-handed spin connection fields. We review the general framework for introducing the coupling using these fields, and show that conditions ensuring the cancellation of perturbative chiral gauge anomalies are not disturbed. We also explore a global anomaly associated with the theory, and argue that its removal requires that the number of fundamental fermions in the theory must be multiples of 16. In addition, we investigate the behavior of the theory under discrete transformations {ital P}, {ital C}, and {ital T}, and discuss possible violations of these discrete symmetries, including {ital CPT}, in the presence of instantons and the Adler-Bell-Jackiw anomaly. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG05-92ER40709
• OSTI ID: 284010
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 10 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
C INVARIANCE
CHIRALITY
COUPLING
CPT THEOREM
FERMIONS
GRAVITATION
MATTER
P INVARIANCE
QUANTUM GRAVITY
SPIN
STANDARD MODEL
T INVARIANCE