We study the decays B0→J/ψπ+π- and B+→J/ ψπ+π0, including intermediate resonances, using a sample of 382×106 BB̄ pairs recorded by the BABAR detector at the PEP-II e+e- B factory. We measure the branching fractions B(B0→J/ψρ0)=(2. 7±0.3±0.2)×10-5 and B(B+→J/ψρ+)=(5.0±0. 7±0.3)×10-5. We also set the following upper limits at the 90% confidence level: B(B0→J/ψπ+π-nonresonant)<1.2×10-5, B(B0→J/ψf2)<4.6×10-6, and B(B+→J/ ψπ+π0nonresonant)<7.3×10-6. We measure the charge asymmetry in charged B decays to J/ψρ to be -0.11±0.12±0.08. © 2007 The American Physical Society.

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Branching fraction and charge asymmetry measurements in B→J/ψππ decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(3), 1-9 [10.1103/PhysRevD.76.031101].

Branching fraction and charge asymmetry measurements in B→J/ψππ decays

PATRIGNANI, CLAUDIA;
2007

Abstract

We study the decays B0→J/ψπ+π- and B+→J/ ψπ+π0, including intermediate resonances, using a sample of 382×106 BB̄ pairs recorded by the BABAR detector at the PEP-II e+e- B factory. We measure the branching fractions B(B0→J/ψρ0)=(2. 7±0.3±0.2)×10-5 and B(B+→J/ψρ+)=(5.0±0. 7±0.3)×10-5. We also set the following upper limits at the 90% confidence level: B(B0→J/ψπ+π-nonresonant)<1.2×10-5, B(B0→J/ψf2)<4.6×10-6, and B(B+→J/ ψπ+π0nonresonant)<7.3×10-6. We measure the charge asymmetry in charged B decays to J/ψρ to be -0.11±0.12±0.08. © 2007 The American Physical Society.
2007
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Branching fraction and charge asymmetry measurements in B→J/ψππ decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(3), 1-9 [10.1103/PhysRevD.76.031101].
Aubert, B; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prudent, X.; Tisserand, V.; Zghiche, A.; Garra Tico, J.; Grauges, E.; Lope...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/551280
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