In 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).
Evidence for X(3872)->psi(2S)gamma in B(+/-)-> X(3872)K(+/-) Decays and a Study of B -> cc gamma K RID C-5223-2009
CALDERINI, GIOVANNI;ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2009-01-01
Abstract
In 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).File in questo prodotto:
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