Recent Results from BABAR: Dark Matter, Axion-like Particles and Heavy Neutral Leptons, a contribution to the 2023 Electroweak session of the 57th Rencontres de Moriond

2023/05/01 by S. Middleton, Middleton, Sophie
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2305.00808

openalex publication_date 2023/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Three independent searches for new physics using data collected at BABAR are presented. Firstly, two searches for dark matter and baryogenesis: B⁰→ Λ+ ψ_D and B⁺ → p + ψ_D are detailed, where ψ_D is a new dark fermion. Neither signal is observed and new upper limits on the branching fractions, at the 90 % confidence level (C.L), are placed at O(10^-5 - 10^-6) across the mass range 1.0< m_ψ_D<4.3 GeV/c². Secondly, new limits on the coupling, g_aW, of an axion-like particle (a) to the W boson, at the 90 % C.L, are presented at O(10^-5) GeV^-1 for a masses in the mass range 0.175

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