Exotic decays of top partners with charge 5/3: bounds and opportunities

被引：0

作者：

Ke-Pan Xie

Giacomo Cacciapaglia

Thomas Flacke

机构：

[1] Seoul National University,Center for Theoretical Physics, Department of Physics and Astronomy

[2] University of Lyon,undefined

[3] Universit́e Claude Bernard Lyon 1,undefined

[4] Institut de Physique des 2 Infinis de Lyon (IP2I),undefined

[5] CNRS/IN2P3 UMR5822,undefined

[6] Center for Theoretical Physics of the Universe,undefined

[7] Institute for Basic Science (IBS),undefined

来源：

Journal of High Energy Physics | / 2019卷

关键词：

Exotics; vector-like quarks; Beyond Standard Model; Hadron-Hadron scattering (experiments); same charge top pair;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Exotic decays of top partners in new bosons are the norm in realistic models of a composite Higgs. We focus on the custodial charge-5/3 partner, which normally decays exclusively into tW+. The new channels include a colour-sextet, X5/3→b¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \overline{b} $$\end{document}π6, as well as singly and doubly charged scalars, X5/3→ t𝜙+, b𝜙++. We use existing same-sign lepton searches to show that the new final states are constrained at the same level as the standard one. At the same time, exotic final states also offer opportunities for improvement: examples include a hard photon in X5/3→ t𝜙+→ tW+γ decays, and top-rich channels which arises in several exotic X5/3 decays.

引用