Search for very light CP-odd Higgs Boson in radiative decays of Upsilon(1S).

Search for very light CP-odd Higgs Boson in radiative decays of Upsilon(1S).

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 t...

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Bibliographic Details
Main Authors: Love, W, Savinov, V, Mendez, H, Ge, J, Miller, D, Shipsey, I, Xin, B, Adams, G, Anderson, M, Cummings, J, Danko, I, Hu, D, Moziak, B, Napolitano, J, He, Q, Insler, J, Muramatsu, H, Park, C, Thorndike, E, Yang, F, Artuso, M, Blusk, S, Khalil, S, Li, J, Mountain, R
Format: Journal article
Language:English
Published: 2008
Description
Summary: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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