Flavour-changing top quark decays in the alternative left-right model

被引：4

作者：

Franka, Mariana ^{[1
]}

Fuks, Benjamin ^{[2
]}

Garg, Sumit K. ^{[3
]}

Poulose, Poulose ^{[4
]}

机构：

[1] Concordia Univ, Dept Phys, 7141 Sherbrooke St West, Montreal, PQ H4B 1R6, Canada

[2] Sorbonne Univ, CNRS, Lab Phys Theor & Hautes Energies, F-75005 Paris, France

[3] Manipal Acad Higher Educ, Manipal Ctr Nat Sci, Dr TMA Pai Planetarium Bldg, Manipal 576104, Karnataka, India

[4] Indian Inst Technol Guwahati, Dept Phys, Gauhati 781039, Assam, India

来源：

PHYSICS LETTERS B | 2024年 / 850卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Top quark decays; Flavour violation; Left-right models; E(+)E(-) COLLISIONS; NEUTRAL CURRENTS; EP COLLISIONS; SEARCH; COUPLINGS; SYMMETRY; STANDARD;

D O I：

10.1016/j.physletb.2024.138548

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We examine flavour-changing neutral-current decays of the top quark, t -* qy, t -* qZ, t -* qH, and t -* qg (with q = u, c), in the Alternative Left-Right Model, a left right-symmetric model featuring exotic quarks and light bosons. These decays have a very small probability of occurring within the Standard Model, but they can be enhanced in this model through the presence of the exotic states. While associated signals may be detected directly at the LHC, rare decays have the advantage of offering means to probe new particles indirectly, through loop-contributions. We perform a comprehensive analysis of the model's parameter space to demonstrate the possible existence of enhancements in the corresponding branching ratios, of 106 for the branching ratios B(t -* uZ) and B(t -*uH), and in the range of 102 - 104 for the other decays, relative to the Standard Model. We subsequently determine the preferred parameter space regions of the model in terms of potential of being reached in the near future.

引用

页数：6

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