Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published October 10, 2013 | Published + Submitted
Journal Article Open

Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Y(1S)


We search for a low-mass scalar CP-odd Higgs boson, A^0, produced in the radiative decay of the upsilon resonance and decaying into a τ^+τ^- pair: Υ(1S) → γA^0. The production of Υ(1S) mesons is tagged by Υ(2S) → π^+π^-Υ(1S) transitions, using a sample of (98.3 ± 0.9) × 10^6 Υ(2S) mesons collected by the BABAR detector. We find no evidence for a Higgs boson in the mass range 3.5 ≤ m_(A^0) ≤ 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^0 to the bb̅ 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.

Additional Information

© 2013 American Physical Society. Received 23 October 2012; published 10 October 2013. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MICIIN (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union), the A. P. Sloan Foundation (USA) and the Binational Science Foundation (USA-Israel).

Attached Files

Published - PhysRevD.88.071102.pdf

Submitted - 1210.5669v1.pdf


Files (836.9 kB)
Name Size Download all
517.2 kB Preview Download
319.8 kB Preview Download

Additional details

August 19, 2023
October 25, 2023