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Flavor changing fermion-graviton vertices
- Source :
- Physical Review D. 79
- Publication Year :
- 2009
- Publisher :
- American Physical Society (APS), 2009.
-
Abstract
- We study the flavor-changing quark-graviton vertex that is induced at the one-loop level when gravitational interactions are coupled to the standard model. Because of the conservation of the energy-momentum tensor the corresponding form factors turn out to be finite and gauge-invariant. Analytical expressions of the form factors are provided at leading order in the external masses. We show that flavor-changing interactions in gravity are local if the graviton is strictly massless while if the graviton has a small mass long-range interactions inducing a flavor-changing contribution in the Newton potential appear. Flavor-changing processes with massive spin-2 particles are also briefly discussed. These results can be generalized to the case of the lepton-graviton coupling.<br />21 pages, 2 figures. New results and two references added. To be published in PRD
- Subjects :
- High Energy Physics - Theory
Quark
Nuclear and High Energy Physics
Particle physics
High Energy Physics::Lattice
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
General Relativity and Quantum Cosmology
Gravitation
Flavor physics
High Energy Physics::Theory
Theoretical physics
High Energy Physics - Phenomenology (hep-ph)
Stress–energy tensor
Gauge theory
Particle Physics - Phenomenology
Physics
Newtonian potential
High Energy Physics::Phenomenology
Graviton
gravity
Vertex (geometry)
Massless particle
High Energy Physics - Phenomenology
High Energy Physics - Theory (hep-th)
High Energy Physics::Experiment
Subjects
Details
- ISSN :
- 15502368 and 15507998
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi.dedup.....6565654f6e910a2a8d929ffd2f2c9152