On lepton flavor universality in top quark decays

被引：10

作者：

Kamenik, Jernej F. ^{[1
,2
]}

Katz, Andrey ^{[3
,4
,5
]}

Stolarski, Daniel ^{[6
]}

机构：

[1] Jozef Stefan Inst, Jamova 39, Ljubljana 1000, Slovenia

[2] Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia

[3] CERN, TH Dept, 1 Esplanade Particules, CH-1211 Geneva 23, Switzerland

[4] Univ Geneva, Dept Phys Theor, 24 Quai E Ansermet, CH-1211 Geneva 4, Switzerland

[5] Univ Geneva, CAP, 24 Quai E Ansermet, CH-1211 Geneva 4, Switzerland

[6] Carleton Univ, Ottawa Carleton Inst Phys, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 2019卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Beyond Standard Model; Heavy Quark Physics; CHARGED HIGGS BOSONS; CROSS-SECTION; SEARCH; COLLISIONS; TEV;

D O I：

10.1007/JHEP01(2019)032

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 propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understanding of top pair production. Based on simplified models accommodating recent hints of LFU violation in charged current B meson decays, we show that existing LHC measurements already provide non-trivial information on the flavor structure and the mass scale of such new physics (NP). We also project that the measurements of LFU in top decays at the high-luminosity LHC could reach a precision at the percent level or below, improving the sensitivity to LFU violating NP in the top sector by more than an order of magnitude compared to existing approaches.

引用

页数：26

共 61 条

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