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Search for a Low-Mass Higgs Boson in Upsilon (3S)--> gamma A0, A0--> tau + tau - at BABAR

Author(s)
Zhao, M.; Yamamoto, R. K.; Sciolla, Gabriella; Henderson, Shawn Wesley; Dujmic, Denis; Spitznagel, Michael A; Cowan, Ray F; Fisher, Peter H; ... Show more Show less
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Alternative title
Search for a Low-Mass Higgs Boson in Υ(3S)→γA0, A0→τ+τ- at BABAR
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We search for a light Higgs boson A0 in the radiative decay Υ(3S)→γA0, A0-->τ+τ-, τ+→e+νeν̅ τ, or τ+-->μ+νμν̅ τ. The data sample contains 122×106 Υ(3S) events recorded with the BABAR detector. We find no evidence for a narrow structure in the studied τ+τ- invariant mass region of 4.03<mτ+τ-<10.10  GeV/c2. We exclude at the 90% confidence level (C.L.) a low-mass Higgs boson decaying to τ+τ- with a product branching fraction B(Υ(3S)-->γA0)×B(A0-->τ+τ-)>(1.5–16)×10-5 across the mτ+τ- range. We also set a 90% C.L. upper limit on the τ+τ- decay of the ηb at B(ηb-->τ+τ-)<8%.
Date issued
2009-10
URI
http://hdl.handle.net/1721.1/54803
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
The BABAR Collaboration et al. “Search for a Low-Mass Higgs Boson in Upsilon (3S)--> gamma A, A--> tau + tau - at BABAR.” Physical Review Letters 103.18 (2009): 181801. © 2009 American Physical Society.
Version: Final published version
ISSN
0031-9007

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