Global fit of top quark effective theory to data

被引：72

作者：

Buckley, Andy ^{[1
]}

Englert, Christoph ^{[1
]}

Ferrando, James ^{[1
]}

Miller, David J. ^{[1
]}

Moore, Liam ^{[1
]}

Russell, Michael ^{[1
]}

White, Chris D. ^{[1
]}

机构：

[1] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 09期

基金：

英国科学技术设施理事会;

关键词：

PAIR PRODUCTION; CROSS-SECTION; PP COLLISIONS; HIGGS; OPERATORS; HELICITY; ROOT-S=7; PHYSICS; SEARCH;

D O I：

10.1103/PhysRevD.92.091501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we present a global fit of beyond the Standard Model (BSM) dimension-six operators relevant to the top quark sector to all currently available top production cross-section measurements, namely parton-level top-pair and single top production at the LHC and the Tevatron. Higher order QCD corrections are modeled using differential and global K-factors, and we use novel fast-fitting techniques developed in the context of Monte Carlo event generator tuning to perform the fit. This allows us to provide new, fully correlated and model-independent bounds on new physics effects in the top sector from the most current direct hadron-collider measurements in light of the involved theoretical and experimental systematics. As a by-product, our analysis constitutes a proof-of-principle that fast fitting of theory to data is possible in the top quark sector, and paves the way for a more detailed analysis including top quark decays, detector corrections and precision observables.

引用

页数：6

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