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Search for very light CP-odd Higgs Boson in radiative decays of Upsilon(1S) |
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| Authors: | Love W Savinov V Mendez H Ge J Y Miller D H Shipsey I P J Xin B Adams G S Anderson M Cummings J P Danko I Hu D Moziak B Napolitano J He Q Insler J Muramatsu H Park C S Thorndike E H Yang F Artuso M Blusk S Khalil S Li J Mountain R Nisar S Randrianarivony K Sultana N Skwarnicki T Stone S Wang J C Zhang L M Bonvicini G Cinabro D Dubrovin M Lincoln A Naik P Rademacker J Asner D M Edwards K W Reed J Briere R A Ferguson T Tatishvili G Vogel H Watkins M E Rosner J L Alexander J P Cassel D G Duboscq J E Ehrlich R Fields L Galik R S Gibbons L Gray R Gray S W Hartill D L Heltsley B K Hertz D Hunt J M |
| Affiliation: | University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA. |
| Abstract: | We search for a non-SM-like CP-odd Higgs boson (a(1)(0)) decaying to tau(+)tau(-) or mu(+)mu(-) in radiative decays of the Upsilon(1S). No significant signal is found, and upper limits on the product branching ratios are set. Our tau(+)tau(-) results are almost 2 orders of magnitude more stringent than previous upper limits. Our data provide no evidence for a Higgs state with a mass of 214 MeV decaying to mu(+)mu(-), previously proposed as an explanation for 3 Sigma(+)-->pmu(+)mu(-) events observed by the HyperCP experiment. Our results constrain NMSSM models. |
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