Decay of Z boson into photon and unparticle

被引：12

作者：

Cheung, Kingman ^{[1
,2
]}

Kephart, Thomas W. ^{[3
]}

Keung, Wai-Yee ^{[4
]}

Yuan, Tzu-Chiang ^{[2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[2] Natl Ctr Theoret Sci, Div Phys, Hsinchu 300, Taiwan

[3] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[4] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

来源：

PHYSICS LETTERS B | 2008年 / 662卷 / 05期

关键词：

D O I：

10.1016/j.physletb.2008.03.037

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：436 / 440

页数：5

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