$R$-parity violating supersymmetry and the 125 GeV Higgs boson signals

Journal Article · 31 December 2019 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.100.115051 · OSTI ID:1580670

Cohen, Jonathan ^[1]; Bar-Shalom, Shaouly ^[1]; Eilam, Gad ^[1]; Soni, Amarjit ^[2]

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1. Technion-Israel Inst. of Technology, Haifa (Israel)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)

We observe the impact of $R$-parity violating super symmetry (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 $$O$$(20-30%) may be expected in the Higgs signal strength observables in some channels, e.g., in $pp → h → μ^+μ^-$, $τ^+τ^-$. Moreover, we find that new and detectable signals associated with BRPV Higgs decays to gauginos, $$h → ν_τ$$ $$\tilde{χ}$$$$^0_2$$ and $$h → τ^±χ^∓_2$$, may also arise in this scenario. These decays yield a typical signature of $h → τ^±ℓ^∓$ + Ɇ$$_T$$ ($ℓ = e, μ, τ$) that can be much larger than in the SM, and may also be accompanied by an $$O$$(20-30%) enhancement in the diphoton signal $pp → h → γγ$. 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 $$O$$(100%) are expected in e.g., $pp → h → μ^+μ^-, τ^+τ^-$, which are sensitive to the BRPV × TRPV coupling product.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: SC0012704
• OSTI ID: 1580670
• Alternate ID(s): OSTI ID: 1595684
• Report Number(s): BNL-213580-2020-JAAM; PRVDAQ; TRN: US2101078
• Journal Information: Physical Review D, Vol. 100, Issue 11; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English