Minimal flavor violation and anomalous top decays

被引：4

作者：

Faller, Sven ^{[1
,2
]}

Mannel, Thomas ^{[2
]}

Gadatsch, Stefan ^{[3
,4
]}

机构：

[1] Univ Siegen, Nat Wissensch Tech Fak, D-57068 Siegen, Germany

[2] Univ Siegen, Nat Wissensch Tech Fak, D-57068 Siegen, Germany

[3] Nikhef, Natl Inst Subatomat Phys, NL-1009 Amsterdam, Netherlands

[4] CERN, CH-1211 Geneva, Switzerland

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 03期

关键词：

UNITARITY TRIANGLE; STANDARD-MODEL; ROOT-S; SEARCH; QUARK; COLLISIONS; PHYSICS; BOSON;

D O I：

10.1103/PhysRevD.88.035006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Top-quark physics at the LHC may open a window to physics beyond the Standard Model and even lead us to an understanding of the phenomenon of "flavor." However, current flavor data is a strong hint that no "new physics" with a generic flavor structure can be expected at the TeV scale. In turn, if there is "new physics" at the TeV scale, it must be "minimally flavor violating." This has become a widely accepted assumption for "new physics" models. In this paper we propose a model-independent scheme to test minimal flavor violation for the anomalous charged Wtq, q is an element of {d, s, b} and flavor-changing Vtq, q is an element of {u, c} and V is an element of {Z, gamma, g} couplings within an effective field theory framework, i.e., in a model-independent way. We perform a spurion analysis of our effective field theory approach and calculate the decay rates for the anomalous top-quark decays in terms of the effective couplings for different helicities by using a two-Higgs doublet model of type II, under the assumption that the top-quark is produced at a high-energy collision and decays as a quasi-free particle.

引用

页数：11

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