New physics contribution to neutral trilinear gauge boson couplings

被引：5
|
作者：
Dutta, Sukanta [1 ]
Goyal, Ashok [2 ]
Mamta [1 ]
机构：
[1] Univ Delhi, Sgtb Khalsa Coll, Delhi 110007, India
[2] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
来源：
EUROPEAN PHYSICAL JOURNAL C | 2009年 / 63卷 / 02期
关键词：
Z-GAMMA PRODUCTION; ZZ-GAMMA; SECTOR; MASS;
D O I：
10.1140/epjc/s10052-009-1103-2
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study the one-loop new physics effects to the CP even triple neutral gauge boson vertices gamma(star) gamma Z, gamma(star) Z Z, Z(star) Z gamma and Z(star) ZZ in the context of Little Higgs models. We compute the contribution of the additional fermions in Little Higgs models in the framework of direct product groups where [SU(2)xU(1)](2) gauge symmetry is embedded in SU(5) global symmetry and also in the framework of the simple group where SU(N)xU(1) gauge symmetry breaks down to SU(2) (L) xU(1). We calculate the contribution of the fermions to these couplings when T parity is invoked. In addition, we re-examine the MSSM contribution at the chosen point of SPS1a' and compare with the SM and Little Higgs models.
引用
收藏
页码：305 / 315
页数：11
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