Gravitational decay of the Z-boson

Details Gravitational decay of the Z-boson Gravitational decay of the Z-boson

2005-09-28

arxiv.org/abs/hep-ph/0509321v2

Phys.Rev. D72 (2005) 093006

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, Latex, uses Axodraw. (Some typographical errors corrected, and some references added in the new version.)

Scientific paper

10.1103/PhysRevD.72.093006

We study the decay process of the Z boson to a photon and a graviton. The most general form of the on-shell amplitude, subject to the constraints due to the conservation of the electromagnetic and the energy-momentum tensor, is determined. The amplitude is expressed in terms of three form factors, two of which are CP-odd while one is CP-even. The latter, which is the only non-zero form factor at the one-loop level, is computed in the standard model and the decay rate is determined.

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