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arXiv 2201.00621hep-phhep-ex
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在非全纯MSSM和LHC搜索中用$b\bar{b}$对关联产生重希格斯玻色子

Associated production of heavy Higgs bosons with a $b\bar{b}$ pair in the Nonholomorphic MSSM and LHC searches

Utpal Chattopadhyay, AseshKrishna Datta, Samadrita Mukherjee, Abhaya Kumar Swain

备注：
24 pages, 7 figures, a few modifications in the text, equations 2.4 and 2.6 updated, conclusions unchanged
发表信息：
JHEP08(2022)113
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摘要：

在非全纯超对称标准模型（NHSSM）中，底夸克的Yukawa耦合（$y_b$）和τ轻子（$y_τ$）可能接收到显著依赖于NHSSM特定三线性软参数$A_b^\prime$和$A_τ^\prime$的显著超对称（SUSY）辐射校正，除了它们众所周知的对$\tanβ$的依赖之外，如已经存在于最小超对称标准模型（MSSM）中的那样。我们研究在何种程度上，这些可能会影响生产截面的重希格斯玻色子（$H$和$A$）与一对$b$ -夸克和它们的衰变分支比，特别是$τ\barτ$对，并将它们与MSSM中获得的。在大型强子对撞机（LHC）运行13 TeV时，要求遵守最近观察到的总横截面与$τ\barτ$分支比之积的上限，数据价值139 fb $^{-1}$，导致NHSSM框架中习惯的$m_A-\tanβ$平面中的排除区域发生了变化。与MSSM设置中LHC实验得出的结果相比。估计这种改变仅对大$\tanβ$（$\geq 40$）和大的负$A_b^\prime$显著，当发现$m_A-\tanβ$平面的强化排除时，与MSSM情况相比，在$\tanβ=60$处的排除$m_A$值大$\approx 200$ GeV。另一方面，对于同样大但正的$A_b^\prime$，$m_A$的最大弛豫几乎不超过$\approx 100$ GeV，这是重中性希格斯玻色子的产生截面和衰变分支分数的互补变化的结果。

英文摘要：

In the NonHolomorphic Supersymmetric Standard Model (NHSSM), the Yukawa couplings of the bottom quark ($y_b$) and the tau lepton ($y_τ$) might receive substantial supersymmetric (SUSY) radiative corrections which have prominent dependencies on the NHSSM-specific trilinear soft parameters, $A_b^\prime$ and $A_τ^\prime$, respectively, in addition to their well-known dependence on $\tanβ$ as is already present in the Minimal SUSY Standard Model (MSSM). We study to what extent these could affect the production cross sections of the heavy Higgs bosons ($H$ and $A$) in association with a pair of $b$-quarks and their decay branching ratios, in particular, to a $τ\barτ$ pair and compare them with those obtained in the MSSM. Requiring compliance with the recently observed upper bounds on the product of their total cross-section and the branching ratio to $τ\barτ$ at the 13 TeV run of the Large Hadron Collider (LHC), with data worth 139 fb$^{-1}$, results in an altered exclusion region in the customary $m_A-\tanβ$ plane in the framework of the NHSSM when compared to what is derived by the LHC experiments within an MSSM setup. Such alterations are estimated to be pronounced only for large $\tanβ$ ($\geq 40$) and for large, negative $A_b^\prime$ when one finds a reinforced exclusion of the $m_A-\tanβ$ plane with an excluded $m_A$ value larger by $\approx 200$ GeV, compared to the MSSM case, at $\tanβ=60$. On the other hand, the maximum relaxation in $m_A$, for a similarly large but positive $A_b^\prime$, barely exceeds $\approx 100$ GeV as a result of complementary variations in production cross-sections and decay branching fractions of the heavy, neutral Higgs bosons.

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