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Evidence for X(3872)->psi(2S)gamma in B-+/--> X(3872)K-+/- Decays and a Study of B -> cc gamma K

AuthorsBabar Collaboration; Azzolini, Virginia; López-March, Neus ; Martínez-Vidal, Fernando ; Milanés, Diego A. ; Oyanguren, Arantza ; Aubert, B.
Issue Date3-Apr-2009
PublisherAmerican Physical Society
CitationPhysical Review Letters 102 (13): 132001 (2009)
AbstractIn a search for B -> cc gamma K decays with the BABAR detector, where cc> includes J/psi and psi(2S), and K includes K-+/-, K-S(0), and K-*(892), we find evidence for X(3872)-> J/psi gamma and X(3872)->psi(2S)gamma with 3.6 sigma and 3.5 sigma significance, respectively. We measure the product of branching fractions B(B-+/--> X(3872)K-+/-)xB(X(3872)-> J/psi gamma)=[2.8 +/- 0.8(stat)+/- 0.1(syst)]x10(-6) and B(B-+/--> X(3872)K-+/-)xB(X(3872)->psi(2S)gamma)=[9.5 +/- 2.7(stat)+/- 0.6(syst)]x10(-6).
Publisher version (URL)http://dx.doi.org/ 10.1103/PhysRevLett.102.132001
Appears in Collections:(IFIC) Artículos
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