arXiv 1906.047432019-06hep-ph

R宇称破坏超对称性和125 GeV Higgs信号

R-Parity Violating Supersymmetry and the 125 GeV Higgs signals

Jonathan Cohen, Shaouly Bar-Shalom, Gad Eilam, Amarjit Soni

备注：: 33 pages, 5 figures, 17 tables
发表信息：: Phys. Rev. D 100, 115051 (2019)
DOI：: 10.1103/PhysRevD.100.115051

摘要：

我们研究了在LHC中R宇称违反超对称性（RPV SUSY）对125 GeV Higgs产生和衰变模式的影响。我们假设一个重的超对称谱，具有多TeV的正方形和SU（2）标量单态，以及在超对称希格斯扇区的去耦极限。在这种情况下，当R宇称守恒时，最轻的CP偶希格斯粒子是类SM的。相比之下，我们表明，当R-宇称违反相互作用被添加到超对称性框架，显着的偏差可能会发生在一些生产和衰变通道的125 GeV希格斯类状态。事实上，我们假设一个单一的味道（主要是第三代）双线性RPV（BRPV）相互作用，产生希格斯-sneutrino混合，轻子-电荷子混合和中微子-中性子混合，并发现${\cal O}(20-30\%)$的显着偏差可能会在希格斯信号强度观测的一些渠道，例如，在$p p \to h \to μ^+ μ^-, τ^+ τ^-$。此外，我们发现，新的和可检测的信号与BRPV希格斯衰变到gauginos，$h\rightarrowν_τ\tildeχ_{2}^{0}$和$h\rightarrowτ^{\pm}χ_{2}^{\mp}$，也可能出现在这种情况下。这些衰变产生$h \to τ^\pm \ell^\mp + {\not\!\! E_T}$（$\ell =e,μ,τ$）的典型特征，其可以比SM中的大得多，并且还可以伴随着双光子信号$pp \to h \to γγ$中的${\cal O}(20-30\%)$增强。我们还研究了Higgs-sneutrino BRPV混合态（假设它是125 GeV标量）的产生和衰变中三线性R宇称违反（TRPV）相互作用的潜在有趣信号，并表明，在这种情况下，预计在例如，$p p \to h \to μ^+ μ^-, τ^+ τ^-$，其对BRPV $\times$ TRPV偶联产物敏感。

英文摘要：

We study the impact of R-parity violating Supersymmetry (RPV SUSY) on the 125 GeV Higgs production and decay modes at the LHC. We assume a heavy SUSY spectrum with multi-TeV squarks and SU(2) scalar singlets as well as the decoupling limit in the SUSY Higgs sector. In this case the lightest CP-even Higgs is SM-like when R-parity is conserved. In contrast, we show that when R-parity violating interactions are added to the SUSY framework, significant deviations may occur in some production and decay channels of the 125 GeV Higgs-like state. Indeed, we assume a single-flavor (mostly third generation) Bilinear RPV (BRPV) interactions, which generate Higgs-sneutrino mixing, lepton-chargino mixing and neutrino-neutralino mixing, and find that notable deviations of ${\cal O}(20-30\%)$ may be expected in the Higgs signal strength observables in some channels, e.g., in $p p \to h \to μ^+ μ^-, τ^+ τ^-$. Moreover, we find that new and detectable signals associated with BRPV Higgs decays to gauginos, $h\rightarrowν_τ\tildeχ_{2}^{0}$ and $h\rightarrowτ^{\pm}χ_{2}^{\mp}$, may also arise in this scenario. These decays yield a typical signature of $h \to τ^\pm \ell^\mp + {\not\!\! E_T}$ ($\ell =e,μ,τ$) that can be much larger than in the SM, and may also be accompanied by an ${\cal O}(20-30\%)$ enhancement in the di-photon signal $pp \to h \to γγ$. We also examine potential interesting signals of Trilinear R-parity violation (TRPV) interactions in the production and decays of the Higgs-sneutrino BRPV mixed state (assuming it is the 125 GeV scalar) and show that, in this case also, large deviations up to ${\cal O}(100\%)$ are expected in e.g., $p p \to h \to μ^+ μ^-, τ^+ τ^-$, which are sensitive to the BRPV$\times$TRPV coupling product.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文