Constraining the $R$-symmetric chargino NLSP at the LHC

Abstract

We present a phenomenological study of Dirac electroweakinos in a $U(1{)}_R$ extension of the MSSM with a strictly $R$-symmetric Higgs sector (MRSSM) and gauge-mediated supersymmetry breaking. One of the distinguishing features of the MRSSM is that the lightest chargino can be lighter than the lightest neutralino. Decays from the NLSP chargino to the gravitino LSP will produce exotic signals. We apply LHC-13 mass limits from both prompt and long-lived searches to the chargino NLSP regime of the MRSSM. Imposing the additional constraints coming from the 125 GeV Higgs and from the electroweak sector, regions of the parameter space are found where the gravitino LSP, chargino NLSP scenario survives all current bounds. We also show that the fine-tuning of the model can reach a level slightly better than sub-percent with our choice of parameters.

16 pages, 6 figures, 1 table; v2: improved chargino mass limit in long-lived regime, references added

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Cited by in corpus (16)

• The current status of fine-tuning in supersymmetry
• Constraining Electroweakinos in the Minimal Dirac Gaugino Model
• Precise prediction for the W boson mass in the MRSSM
• Exploring color-octet scalar parameter space in minimal $R$-symmetric models
• The LFV decays of Z boson in Minimal R-symmetric Supersymmetric Standard Model
• Color-octet scalars in Dirac gaugino models with broken $R$ symmetry
• $t\bar{t}t\bar{t}$ signatures through the lens of color-octet scalars
• Supersoft Stops
• Muon conversion to electron in nuclei in Minimal R-symmetric Supersymmetric Standard Model
• Searching for lepton flavor violating decays tau to Pl in Minimal R-symmetric Supersymmetric Standard Model
• The lepton flavor violating decays of vector mesons in the MRSSM
• Reinterpreting $pp\to W^{+}{W}^{-}$ searches for charginos
• One loop correction to $Z\to \nu \nu$ in the Minimal R-symmetric Supersymmetric Standard Model
• $l_{\alpha }\to 3l_{\beta }$ in Minimal R-symmetric Supersymmetric Standard Model
• Long-lived bi$\mathbf{\nu }$o at the LHC
• R-Symmetric NMSSM