| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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Search for di-muon decays of a low-mass Higgs boson in radiative decays of the \Upsilon(1S) |
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| Auteur : |
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J. P. Lees1, V. Poireau1, V. Tisserand1, D. Bernard2, M. Verderi2, S. Emery3, G. Hamel de Monchenault3, G. Vasseur3, Ch. Yèche3, S. Akar4, E. Ben-Haim4, M. Bomben4, G.R. Bonneaud4, H. Briand4, G. Calderini4, J. Chauvau4, O. Hamon4, Ph. Leruste4, G. Marchiori4, J. Ocariz4, S. Sitt4, N. Arnaud5, M. Davier5, D. Derkach5, G. Grosdidier5, F. Le Diberder5, A. M. Lutz5, B. Malaescu5, P. Roudeau5, M. H. Schune5, A. Stocchi5, G. Wormser5 |
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| Laboratoire : |
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| Résumé : |
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We search for di-muon decays of a low-mass Higgs boson (A^0) produced in radiative \Upsilon(1S) decays. The \Upsilon(1S) sample is selected by tagging the pion pair in the \Upsilon(2S, 3S) \to \pi^+ \pi^- \Upsilon(1S) transitions, using a data sample of 92.8 \times 10^6 \Upsilon(2S) and 116.8 \times 10^6 \Upsilon(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 \mathcal{B} (\Upsilon(1S) \to \gamma A^0) \times \mathcal{B} (A^0 \to \mumu) in the range of (0.28 - 9.7) \times 10^{-6} for 0.212 \le m_{A^0} \le 9.20 GeV/c^2. The results are combined with our previous measurements of \Upsilon(2S,3S) \to \gamma A^0, A^0 \to \mumu to set limits on the effective coupling of the \b-quark to the A^0. |
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| Collaboration/Projet : |
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BABAR |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication ou d'écriture : |
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2013 |
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| Nom du périodique : |
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| Physical Review D (Phys. Rev. D) |
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American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
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| Volume : |
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87 |
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| Page/Article : |
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031102 |
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| Identifiant local : |
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babar-PUB-12/023; SLAC-PUB-15252 |
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| Commentaire : |
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9 pages, 6 postscript figures, submitted to PRD-RC - See paper for full list of authors |
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