Search for Low-mass Dark-Sector Gauge Boson with the BABAR Detector

2017/01/06 by Godang, Romulus
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.1701.01753

Abstract

We report searches for a new muonic dark force mediated by a gauge boson (Z') coupling only to the second and third lepton families. The existence of the Z' boson is probed in e⁺e^- → μ⁺μ^- Z', Z' → μ⁺ μ^- events, with an analysis based on the full data sample collected with the BABAR detector at the PEP-II e⁺e^- collider. No significant signal is observed. Limits on dark-sector coupling constants are derived; these improve upon current bounds, and further constrain the allowed parameter space.

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