We study the decay B- → J/ΨK -π+π- using 117×106 BB̄ events collected at the Y(4S) resonance with the BABAR detector at the PEP-II e+e- asymmetric-energy storage ring. We measure the branching fractions ℬ (B- → J/ΨK -π+π-) = (116±7(stat.) ±9(syst.))×10-5 and ℬ (B- → X(3872)K-) × ℬ (X(3872) → J/Ψπ+π -) = (1.28±0.41)×10-5 and find the mass of the X(3872) to be 3873.4±1.4 MeV/c2. We search for the h c narrow state in the decay B- → hcK -, hc → J/Ψπ+π- and for the decay B- → J/ΨD0π-, with D0 → K-π+. We set the 90% C.L. limits ℬ(B- → hcK-) × ℬ(h c → J/Ψπ+π-)<3. 4×10-6 and ℬ(B- → J/ΨD 0π-)<5.2×10-5.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2004). Study of the B- → J/ΨK -π+π- decay and measurement of the B - → X(3872)K- branching fraction. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 71(7), 1-7 [10.1103/PhysRevD.71.071103].

Study of the B- → J/ΨK -π+π- decay and measurement of the B - → X(3872)K- branching fraction

Carpinelli, M.;
2004

Abstract

We study the decay B- → J/ΨK -π+π- using 117×106 BB̄ events collected at the Y(4S) resonance with the BABAR detector at the PEP-II e+e- asymmetric-energy storage ring. We measure the branching fractions ℬ (B- → J/ΨK -π+π-) = (116±7(stat.) ±9(syst.))×10-5 and ℬ (B- → X(3872)K-) × ℬ (X(3872) → J/Ψπ+π -) = (1.28±0.41)×10-5 and find the mass of the X(3872) to be 3873.4±1.4 MeV/c2. We search for the h c narrow state in the decay B- → hcK -, hc → J/Ψπ+π- and for the decay B- → J/ΨD0π-, with D0 → K-π+. We set the 90% C.L. limits ℬ(B- → hcK-) × ℬ(h c → J/Ψπ+π-)<3. 4×10-6 and ℬ(B- → J/ΨD 0π-)<5.2×10-5.
Articolo in rivista - Articolo scientifico
article; energy; mathematical computing; molecular weight
English
2004
71
7
1
7
071103
none
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2004). Study of the B- → J/ΨK -π+π- decay and measurement of the B - → X(3872)K- branching fraction. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 71(7), 1-7 [10.1103/PhysRevD.71.071103].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389915
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