Vector-like quarks decaying into singly and doubly charged bosons at LHC

被引：18

作者：

Corcella, Gennaro ^{[1
]}

Costantini, Antonio ^{[2
]}

Ghezzi, Margherita ^{[3
]}

Panizzi, Luca ^{[4
,5
]}

Pruna, Giovanni Marco ^{[6
]}

Salko, Jakub ^{[4
,7
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 54, I-00044 Frascati, Italy

[2] Catholic Univ Louvain, Ctr Cosmol Particle Phys & Phenomenol CP3, Chemin Cyclotron, B-1348 Louvain La Neuve, Belgium

[3] Eberhard Karls Univ Tubingen, Inst Theoret Phys, Morgenstelle 14, D-72076 Tubingen, Germany

[4] Uppsala Univ, Dept Phys & Astron, Box 516, ES-75120 Uppsala, Sweden

[5] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[6] Maynooth Univ, Dept Theoret Phys, Maynooth, Kildare, Ireland

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 10期

基金：

瑞士国家科学基金会;

关键词：

Beyond Standard Model; Gauge Symmetry; Heavy Quark Physics; MODEL; SEARCH; PREDICTIONS; BREAKING; FLAVOR;

D O I：

10.1007/JHEP10(2021)108

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 investigate the production of vector-like quarks with charge 5/3 at the LHC and their subsequent decays into new singly or doubly charged bosons plus a heavy quark (top or bottom). In particular, we explore final states with same-sign di-leptons (electron or muon pairs), with the leptons coming from the decay of the new bosons and, in the case of production of singly charged bosons, from top quarks as well. These processes are predicted by classes of models based on extensions of the gauge group of the Standard Model, such as the 331 Model, where the electroweak symmetry is described by SU(3)(L) x U(1)(X), X being a new abelian charge. For this purpose, a CMS search for vector-like partners with charge 5/3 decaying into Wt is recast to obtain model-independent bounds and projected reaches at future luminosity stages of the LHC. The results are then interpreted as mass bounds for the new particles predicted in the 331 Model and as a constraint on the scale of its spontaneous symmetry breaking. The complete set of model-independent results are provided as recast efficiencies, to allow for reinterpretation in different scenarios.

引用

页数：32

共 93 条

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