Explanation of the 95 GeV $\gamma \gamma$ and $b\bar{b}$ excesses in the Minimal Left-Right Symmetric Model

Abstract

We propose a simple interpretation of the $\gamma \gamma$ excesses reported by both CMS and ATLAS groups at 95 GeV together with the LEP excess in the $Zb\bar{b}$ channel around the same mass in terms of a neutral scalar field in the minimal left-right symmetric model (LRSM). We point out that the scalar field which implements the seesaw mechanism for neutrino masses has all the right properties to explain these observations, without introducing any extra scalar fields. The key point is that this scalar particle is hardly constrained because it couples only to heavy right-handed particles. As a result, the diphoton decay mode receives contributions from both mixing with the Standard Model (SM) Higgs and the heavy charged bosons in the LRSM, depending on the $SU(2{)}_R\times U(1{)}_{B-L}$ symmetry breaking scale $v_R$. The complete allowed parameter space for explaining the 95 GeV excesses in this model can be probed with the high-precision measurements of the SM Higgs mixing with other scalars at the high-luminosity LHC and future Higgs factories.

9 pages + references, 6 figures; minor changes, version published in Phys. Lett. B

References in corpus (16)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• A portrait of the Higgs boson by the CMS experiment ten years after the discovery
• A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
• Status of the Higgs Singlet Extension of the Standard Model after LHC Run 1
• Left-Right Symmetry: from LHC to Neutrinoless Double Beta Decay
• General CP Violation in Minimal Left-Right Symmetric Model and Constraints on the Right-Handed Scale
• Strong P invariance, neutron EDM and minimal Left-Right parity at LHC
• Possible indications for new Higgs bosons in the reach of the LHC: N2HDM and NMSSM interpretations
• The CMS di-photon excess at 95 GeV in view of the LHC Run 2 results
• Unveiling Hidden Physics at the LHC
• Leptogenesis Constraints on the Mass of Right-handed Gauge Bosons
• Kaon CP violation and neutron EDM in the minimal left-right symmetric model
• Scrutinizing the 95-100 GeV di-tau excess in the top associated process
• Multiphoton signals of a (96 GeV?) stealth boson
• Asymmetric di-Higgs signals of the next-to-minimal 2HDM with a $U(1)$ symmetry

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• Vector dark matter and LHC constraints, including a 95 GeV light Higgs boson
• When The Standard Model Higgs Meets Its Lighter 95 GeV Twin
• Interpretation of 95 GeV Excess within the Georgi-Machacek Model in Light of Positive Definiteness Constraints
• Exploring Potential Higgs Resonances at 650 GeV and 95 GeV in the 2HDM Type III
• Explaining 95 GeV Anomalies in the 2-Higgs Doublet Model Type-I
• Probing Type-I 2HDM light Higgs in the top-pair-associated diphoton channel
• Bayesian Active Search on Parameter Space: a 95 GeV Spin-0 Resonance in the ($B-L$)SSM
• Testing a 95 GeV Scalar at the CEPC with Machine Learning
• 96 GeV Scalar Boson in the 2HDM with U(1)_H Gauge Symmetry
• Interpreting the 650 GeV and 95 GeV Higgs anomalies in the next-to-two-Higgs-doublet model
• Particle-level transformers for 95 GeV Higgs boson searches at future $e^{+}{e}^{-}$ Higgs factories
• Interpretation of LHC excesses at 95 GeV and 152 GeV in an extended Georgi-Machacek model
• Phenomenology of the standard HVM and 95.4 GeV excess
• Searching for a Heavy Neutral CP-Even Higgs Boson in the BLSSM at the LHC Run 3 and HL-LHC