Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Υ(1S)
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search for di-muon.pdf
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1.28 MB
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Author(s)
Sciolla, Gabriella
Cowan, Ray F
Dujmic, Denis
Date Issued
February 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P. et al. “Search for Di-muon Decays of a Low-mass Higgs Boson in Radiative Decays of the Υ(1S).” Physical Review D 87.3 (2013). © 2013 American Physical Society
Version
Final published version
Abstract
We search for di-muon decays of a low-mass Higgs boson (A[superscript 0]) produced in radiative Υ(1S) decays. The Υ(1S) sample is selected by tagging the pion pair in the Υ(2S,3S)→π[superscript +]π[superscript -]Υ(1S) transitions, using a data sample of 92.8×10[superscript 6] Υ(2S) and 116.8×10[superscript 6] Υ(3S) events collected by the BABAR detector. We find no evidence for A[superscript 0] production and set 90% confidence level upper limits on the product branching fraction B(Υ(1S)→γA[superscript 0])×B(A[superscript 0]→μ[superscript +]μ[superscript -]) in the range of (0.28-9.7)×10[superscript -6] for 0.212≤m[subscript A][superscript 0]≤9.20 GeV/c[superscript 2]. The results are combined with our previous measurements of Υ(2S,3S)→γA[superscript 0], A[superscript 0]→μ[superscript +]μ[superscript -] to set limits on the effective coupling of the b quark to the A[superscript 0].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.031102
