Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Υ(1S)
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Lees-2013-Search for a low-mass.pdf
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Author(s)
Sciolla, Gabriella
Flood, Kevin T.
Cowan, Ray F
Dujmic, Denis
Date Issued
October 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, et al. “Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Υ(1S).” Physical Review D 88, no. 7 (October 2013). © 2013 American Physical Society
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Final published version
Abstract
We search for a low-mass scalar CP-odd Higgs boson, A[superscript 0], produced in the radiative decay of the upsilon resonance and decaying into a τ[superscript +]τ[superscript −] pair: Υ(1S) → γA[superscript 0]. The production of Υ(1S) mesons is tagged by Υ(2S) → π[superscript +]π[superscript −]Υ(1S) transitions, using a sample of (98.3 ± 0.9) × 10[superscript 6] Υ(2S) mesons collected by the BABAR detector. We find no evidence for a Higgs boson in the mass range 3.5 ≤ m[subscript A0] ≤ 9.2 GeV, and combine these results with our previous search for the tau decays of the light Higgs in radiative Υ(3S) decays, setting limits on the coupling of A[superscript 0] to the b[bar over b] quarks in the range 0.09–1.9. Our measurements improve the constraints on the parameters of the next-to-minimal-supersymmetric Standard Model and similar theories with low-mass scalar degrees of freedom.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.88.071102
