In a study of B+→J/ψγK+ decays, we find evidence for the radiative decay X(3872)→J/ψγ with a statistical significance of 3.4σ. We measure the product of branching fractions ℬ(B+→X(3872)K+)·ℬ(X(3872)→J/ψγ)=(3.3±1.0±0.3)×10−6, where the uncertainties are statistical and systematic, respectively. We also measure the branching fraction ℬ(B+→χc1K+)=(4.9±0.2±0.4)×10−4. These results are obtained from (287±3) million BB⎯⎯⎯ decays collected at the Υ(4S) resonance with the BABAR detector at the PEP-II B Factory at SLAC.

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2006). Search for B+-> X(3872)K+, X(3872)-> J/psi gamma. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 74(7), 1-7 [10.1103/PhysRevD.74.071101].

Search for B+-> X(3872)K+, X(3872)-> J/psi gamma

PATRIGNANI, CLAUDIA;
2006

Abstract

In a study of B+→J/ψγK+ decays, we find evidence for the radiative decay X(3872)→J/ψγ with a statistical significance of 3.4σ. We measure the product of branching fractions ℬ(B+→X(3872)K+)·ℬ(X(3872)→J/ψγ)=(3.3±1.0±0.3)×10−6, where the uncertainties are statistical and systematic, respectively. We also measure the branching fraction ℬ(B+→χc1K+)=(4.9±0.2±0.4)×10−4. These results are obtained from (287±3) million BB⎯⎯⎯ decays collected at the Υ(4S) resonance with the BABAR detector at the PEP-II B Factory at SLAC.
2006
Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2006). Search for B+-> X(3872)K+, X(3872)-> J/psi gamma. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 74(7), 1-7 [10.1103/PhysRevD.74.071101].
Aubert, B; Barate, R; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, Jp; Poireau, V; Tisserand, V; Zghiche, A; Grauges, E; Palano, A; Chen, Jc...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/537447
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