Resolving gluon fusion loops at current and future hadron colliders

被引：36

作者：

Azatov, Aleksandr ^{[1
]}

Grojean, Christophe ^{[2
]}

Paul, Ayan ^{[3
]}

Salvioni, Ennio ^{[4
]}

机构：

[1] Abdus Salam Int Ctr Theoret Phys, Str Costiera 11, I-34151 Trieste, Italy

[2] DESY, Theory Grp, Notkestr 85, D-22607 Hamburg, Germany

[3] Ist Nazl Fis Nucl, Sez Roma, Ple A Moro 2, I-00185 Rome, Italy

[4] Univ Calif Davis, Dept Phys, One Shields Ave, Davis, CA 95616 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 09期

基金：

欧洲研究理事会;

关键词：

Beyond Standard Model; Effective field theories; Higgs Physics; Technicolor and Composite Models;

D O I：

10.1007/JHEP09(2016)123

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：

Inclusive Higgs measurements at the LHC have limited resolution on the gluon fusion loops, being unable to distinguish the long-distance contributions mediated by the top quark from possible short-distance new physics effects. Using an Effective Field Theory (EFT) approach we compare several proposed methods to lift this degeneracy, including t (t) over barh and boosted, off-shell and double Higgs production, and perform detailed projections to the High-Luminosity LHC and a future hadron collider. In addition, we revisit off-shell Higgs production. Firstly, we point out its sensitivity to modifications of the top-Z couplings, and by means of a general analysis we show that the reach is comparable to that of tree-level processes such as t (t) over barZ production. Implications for composite Higgs models are also discussed. Secondly, we assess the regime of validity of the EFT, performing an explicit comparison for a simple extension of the Standard Model containing one vector-like quark.

引用

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