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

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,Kandaswamy J,Kreinick D L,Kuznetsov V E,Ledoux J,Mahlke-Krüger H,Mohapatra D,Onyisi P U E,Patterson J R,Peterson D,Riley D,Ryd A,Sadoff A J,Shi X,Stroiney S,Sun W M,Wilksen T,Athar S B,Patel R,Yelton J,Rubin P,Eisenstein B I,Karliner I,Mehrabyan S,Lowrey N,Selen M,White E J,Wiss J,Mitchell R E,Shepherd M R,Besson D,Pedlar T K,Cronin-Hennessy D,Gao K Y,Hietala J,Kubota Y,Klein T,Lang B W,Poling R,Scott A W,Zweber P,Dobbs S,Metreveli Z,Seth K K,Tomaradze A,Libby J,Martin L,Powell A,Wilkinson G,Ecklund K M, Null Null

Physical review letters（2008）

Cited 2|Views29

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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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Key words

pair production,branching ratio,elementary particles,higgs boson,standard model,protons,mass

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