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.
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页数：26
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