Decay of Z Boson into Photon and Unparticle

Details Decay of Z Boson into Photon and Unparticle Decay of Z Boson into Photon and Unparticle

2008-01-11

arxiv.org/abs/0801.1762v1

Phys.Lett.B662:436-440,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures plus 1 table

Scientific paper

10.1016/j.physletb.2008.03.037

We study the decay of the standard model Z boson into unparticle plus a single photon through a one-loop process. As in the anomaly type decay, only the axial-vector part of the Z coupling matching with the vector unparticle and/or the vector part of the Z coupling matching with the axial-vector unparticle can give a nonzero contribution to the decay. We show that the photon spectrum terminates at the end point in accord with Yang's theorem. Existing data on single photon production at LEP I is used to constrain the unparticle sector.

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