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)→ψ(2S)γ in B±→X(3872)K± Decays and a Study of B→cc¯γK
CONTRI, ROBERTO;LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;PATRIGNANI, CLAUDIA;SANTRONI, ALBERTO;TOSI, SILVANO;
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:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.