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Search for a Dark Leptophilic Scalar in e+e- Collisions

Lees J. P.
•
Poireau V.
•
Tisserand V.
altro
Wu S. L.
2020
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an e+e- collider, such a leptophilic scalar (φL) would be produced predominantly through radiation from a τ lepton. We report herein a search for e+e-→τ+τ-φL, φL→l+l- (l=e, μ) using data collected by the BABAR experiment at SLAC. No significant signal is observed, and we set limits on the φL coupling to leptons in the range 0.04<7.0 GeV. These bounds significantly improve upon the current constraints, excluding almost entirely the parameter space favored by the observed discrepancy in the muon anomalous magnetic moment below 4 GeV at 90% confidence level.
DOI
10.1103/PhysRevLett.125.181801
WOS
WOS:000582670300010
Archivio
http://hdl.handle.net/11368/2983886
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85094897709
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.181801
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2983886/1/PhysRevLett.125.181801.pdf
Soggetti
  • BaBar

  • PEP-II

  • Rare decay

Scopus© citazioni
14
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
12
Data di acquisizione
Mar 27, 2024
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