At the LHC, the gluon-initiated processes are considered to be the primary source of di-Higgs production. However, in the presence of a new resonance, the light-quark initiated processes can also contribute significantly. In this letter, we look at the di-Higgs production mediated by a new singlet scalar. The singlet is produced in both quark-antiquark and gluon fusion processes through loops involving a scalar leptoquark and right-handed neutrinos. With benchmark parameters inspired from the recent resonant di-Higgs searches by the ATLAS collaboration, we examine the prospects of such a resonance in the TeV-range at the High-Luminosity LHC (HL-LHC) in the $b\overline{b}{\tau }^{+}{\tau }^{-}$ mode with a multivariate analysis. We obtain the 5σ and 2σ contours and find that a significant part of the parameter space is within the reach of the HL-LHC.

在大型强子对撞机中，胶子引发的过程被认为是二希格斯粒子产生的主要来源。然而，在存在新共振的情况下，光夸克引发的过程也可以做出重大贡献。在这封信中，我们研究了由一个新的单线态标量介导的二希格斯产生。单线态是在夸克-反夸克和胶子聚变过程中通过涉及标量轻夸克和右手中微子的循环产生的。借助来自 ATLAS 合作最近的共振 di-Higgs 搜索的基准参数，我们研究了在$b\overline{b}{\tau }^{+}{\tau }^{-}$模式与多变量分析。我们获得了 5 σ和 2 σ等值线，发现参数空间的很大一部分在 HL-LHC 的范围内。