Search for pair production of the heavy vectorlike top partner in same-sign dilepton signature at the HL-LHC
| Autor: | Cui, Xiao-Min, Li, Yu-Qi, Liu, Yao-Bei |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 106 (2022) 115025 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.106.115025 |
| Popis: | New vectorlike quarks are predicted in many new physics scenarios beyond the Standard Model~(SM) and could potentially be discovered at the LHC. Based on a simplified model including a singlet vectorlike top partner with charge $2/3$, we investigate the process $pp \to TT$ via a $t$-channel induced by the couplings between the top partner with the first-generation SM quarks. We calculate the production cross section and further study the observability of the heavy top partner in the channel $T\to Wq$ at the high-luminosity LHC (HL-LHC) using final states with same-sign dileptons (electrons or muons), two jets, and missing transverse momentum. At the 14 TeV LHC with an integrated luminosity of 3000 fb$^{-1}$, the $2\sigma$ exclusion limits, as well as the $5\sigma$ discovery reach in the parameter plane of the two variables $g^{\ast}-R_L$, are respectively obtained at the HL-LHC. We also obtain the $2\sigma$ exclusion limit on the coupling strength parameter $g^{\ast}$ in the case in which the vectorlike top partner is coupled only to the first-generation quarks. Comment: 16 pages, 6 figures, version in PRD |
| Databáze: | arXiv |
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