论文标题
在HL-LHC上搜索在同一符号DILEPTON签名中的重型矢量般的顶级合作伙伴的配对生产
Search for pair production of the heavy vectorlike top partner in same-sign dilepton signature at the HL-LHC
论文作者
论文摘要
除标准模型（SM）以外的许多新物理场景中，都可以预测新的矢量夸克，并有可能在LHC上发现。基于一个简化的模型，包括带电$ 2/3 $的Singlet Vectorlike顶级合作伙伴，我们通过与第一代SM Quarks的顶级合作伙伴之间的耦合构成的$ t $ channel一起调查了$ pp \ tt $。我们使用具有相同符号二种二甲体（电子或MUON）的最终状态，两个喷气机和缺少横向动量的最终状态，进一步研究了在高光度LHC（HL-LHC）上，在高亮度LHC（HL-LHC）上，重型顶部伙伴在$ t \ to wq $中的可观察性。在14个TEV LHC上，具有3000 fb $^{ - 1} $的集成光度的14个TEV LHC，分别在HL-LHC上分别获得了两个变量$ g^{\ ast ast} -r_l $的参数平面的$2σ$ rexculive限制。我们还获得了$2σ$的排除限制，即在仅将矢量类伙伴耦合到第一代夸克的情况下，耦合强度参数$ g^{\ ast} $。
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 $2σ$ exclusion limits, as well as the $5σ$ 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 $2σ$ 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.
