Search for Hadronic Decays of a Light Higgs Boson in the Radiative Decay Y → yA^0

Creators: Lees, J. P.; Cheng, C. H.; Doll, D. A.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Rakitin, A. Y.; BaBar Collaboration

Abstract

We search for hadronic decays of a light Higgs boson (A^0) produced in radiative decays of an Υ(2S) or Υ(3S) meson, Υ→γA^0. The data have been recorded by the BABAR experiment at the Υ(3S) and Υ(2S) center-of-mass energies and include (121.3±1.2)×10^6 Υ(3S) and (98.3±0.9)×10^6 Υ(2S) mesons. No significant signal is observed. We set 90% confidence level upper limits on the product branching fractions B(Υ(nS)→γA^0)B(A^0→hadrons) (n=2 or 3) that range from 1×10^(-6) for an A^0 mass of 0.3 GeV/c^2 to 8×10^(-5) at 7 GeV/c^2.

Additional Information

© 2011 American Physical Society. Received 18 August 2011; published 21 November 2011. 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), IHEP (China), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MIST (Russia), and PPARC (United Kingdom). Individuals have received support from CONACyT (Mexico), A. P. Sloan Foundation, Research Corporation, and Alexander von Humboldt Foundation.

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