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Título

Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Gamma(1S)

AutorBabar Collaboration; Lees, J. P.; Martínez-Vidal, Fernando CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Villanueva-Pérez, P.
Palabras claveLeptonic decays
Quarkonium
Fecha de publicación15-feb-2013
EditorAmerican Physical Society
CitaciónPhysical Review - Section D - Particles and Fields 87 (3): 031102 - 8 (2013)
ResumenWe search for di-muon decays of a low-mass Higgs boson (A(0)) produced in radiative Gamma(1S) decays. The Gamma(1S) sample is selected by tagging the pion pair in the Gamma(2S, 3S) -> pi(+)pi(-) Gamma(1S) transitions, using a data sample of 92.8 x 10(6) Gamma(2S) and 116.8 x 10(6) Gamma(3S) events collected by the BABAR detector. We find no evidence for A(0) production and set 90% confidence level upper limits on the product branching fraction B(Gamma(1S) -> gamma Lambda(0)) x B(Lambda(0)->mu(+)mu(-)) in the range of (0.28 - 9.7) x 10(-6) for 0.212 <= m(A0) <= 9.20 GeV/c(2). The results are combined with our previous measurements of Gamma(2S,3S) -> gamma Lambda(0), Lambda(0) -> mu(+)mu(-) to set limits on the effective coupling of the b quark to the Lambda(0).
Versión del editorhttp://dx.doi.org/10.1103/PhysRevD.87.031102
URIhttp://hdl.handle.net/10261/125629
DOI10.1103/PhysRevD.87.031102
ISSN1550-7998
E-ISSN1550-2368
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