Search for single production of a top quark partner via the T →th and h →wW∗ channels at the LHC

Liu, Yao Bei and Moretti, Stefano (2019) Search for single production of a top quark partner via the T →th and h →wW∗ channels at the LHC. Physical Review D, 100 (1), 1-9, [015025]. (doi:10.1103/PhysRevD.100.015025).

Record type: Article

Abstract

Many scenarios of physics beyond the Standard Model that address the hierarchy problem also predict the existence of vectorlike top quark partners, which are generally expected around the TeV scale. In this paper, we propose to search for a vectorlike top quark partner with charge 2/3 in a simplified model including only two free parameters, the coupling constant g∗ and top quark partner mass mT. We investigate the observability of the top quark partner through the process pp→T(→th)j→t(→bW+→b+ν)h(→WW∗→+ν-ν)j, where T is the heavy top quark partner and h the SM-like Higgs boson, at the Large Hadron Collider (LHC). The discovery prospects and exclusion limits on the parameter plane defined by (mT, g∗) are obtained for the already scheduled LHC runs as well as the future High-Luminosity LHC (HL-LHC). The constraints and projected sensitivities are also interpreted in a realistic model, i.e., the minimal Composite Higgs Model with singlet top quark partners. Finally, we also analyze the projected sensitivity in terms of the production cross section times branching fraction at the (HL-)LHC.

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