Study of the B-→J/ψK-π+π- decay and measurement of the B-→X(3872)K- branching fraction
Abstract
We study the decay B-→J/ψK-π+π- using 117×106 BB¯ 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 hc 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(hc→J/ψπ+π-)<3.4×10-6 and B(B-→J/ψD0π-)<5.2×10-5.
- Publication:
-
Physical Review D
- Pub Date:
- April 2005
- DOI:
- 10.1103/PhysRevD.71.071103
- arXiv:
- arXiv:hep-ex/0406022
- Bibcode:
- 2005PhRvD..71g1103A
- Keywords:
-
- 13.25.Hw;
- 11.30.Er;
- 12.15.Hh;
- Decays of bottom mesons;
- Charge conjugation parity time reversal and other discrete symmetries;
- Determination of Kobayashi-Maskawa matrix elements;
- High Energy Physics - Experiment
- E-Print:
- 7 pages 4 figures, submitted to Phys. Rev. Lett