Lepton-quark fusion at Hadron colliders, precisely

被引：25

作者：

Greljo, Admir ^{[1
,2
]}

Selimovic, Nudzeim ^{[3
]}

机构：

[1] Univ Bern, Albert Einstein Ctr Fundamental Phys, Inst Theoret Phys, Sidlerstr 5, CH-3012 Bern, Switzerland

[2] CERN, Dept Theoret Phys, CH-1211 Geneva 23, Switzerland

[3] Univ Zurich, Phys Inst, CH-8057 Zurich, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 03期

基金：

欧洲研究理事会; 瑞士国家科学基金会;

关键词：

Beyond Standard Model; Perturbative QCD; Heavy Quark Physics; LEPTOQUARK PAIR PRODUCTION; NULL TESTS; PHYSICS; DECAY; UNIFICATION; VIOLATION;

D O I：

10.1007/JHEP03(2021)279

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：

When a TeV-scale leptoquark has a sizeable Yukawa coupling, its dominant production mechanism at hadron colliders is the partonic-level lepton-quark fusion. Even though the parton distribution functions for leptons inside the proton are minuscule, they get compensated by the resonant enhancement. We present the first computation of higher order radiative corrections to the resonant leptoquark production cross section at the Large Hadron Collider (LHC). Next-to-leading (NLO) QCD and QED corrections are similar in size but come with the opposite sign. We compute NLO K-factors for a wide range of scalar leptoquark masses, as well as, all possible combinations of quark and lepton flavors and leptoquark charges. Theoretical uncertainties due to the renormalisation and factorisation scale variations and the limited knowledge of parton distribution functions are quantified. We finally discuss how to disentangle the flavor structure of leptoquark interactions by exploiting the interplay between different production channels.

引用

页数：29

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