NuTeV anomaly, lepton universality, and nonuniversal neutrino-gauge couplings

被引：48

作者：

Loinaz, W ^{[1
]}

Okamura, N

Rayyan, S

Takeuchi, T

Wijewardhana, LCR

机构：

[1] Amherst Coll, Dept Phys, Amherst, MA 01002 USA

[2] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[3] Korea Inst Adv Study, Seoul 130722, South Korea

[4] Virginia Tech, Dept Phys, Inst Particle Phys & Astrophys, Blacksburg, VA 24061 USA

[5] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.70.113004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In previous studies we found that models with flavor-universal suppression of the neutrino-gauge couplings are compatible with NuTeV and Z-pole data. In this paper we expand our analysis to obtain constraints on flavor-dependent coupling suppression by including lepton universality data from W, tau, pi and K decays in fits to model parameters. We find that the data are consistent with a variety of patterns of coupling suppression. In particular, in scenarios in which the suppression arises from the mixing of light neutrinos with heavy gauge singlet states (neutrissimos), we find patterns of flavor-dependent coupling suppression which are also consistent with constraints from mu-->egamma.

引用

页码：113004 / 1

页数：12

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