We search for the Z 1(4050) + and Z 2(4250) + states, reported by the Belle Collaboration, decaying to χ c1π + in the decays B ̄0→χ c1K -π + and B +→χ c1KS0π + where χ c1→J/ψγ. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e +e - collider operating at center-of-mass energy 10.58 GeV, and correspond to an integrated luminosity of 429fb -1. In this analysis, we model the background-subtracted, efficiency-corrected χ c1π + mass distribution using the Kπ mass distribution and the corresponding normalized Kπ Legendre-polynomial moments, and then test the need for the inclusion of resonant structures in the description of the χ c1π + mass distribution. No evidence is found for the Z 1(4050) + and Z 2(4250) + resonances, and 90% confidence level upper limits on the branching fractions are reported for the corresponding B-meson decay modes.

Lees, J., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., et al. (2012). Search for the Z 1(4050) + and Z 2(4250) + states in B ̄0→χ c1K -π + and B +→χ c1KS0π +. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85(5) [10.1103/PhysRevD.85.052003].

Search for the Z 1(4050) + and Z 2(4250) + states in B ̄0→χ c1K -π + and B +→χ c1KS0π +

Martinelli M.;CARPINELLI, Massimo
Membro del Collaboration Group
;
2012

Abstract

We search for the Z 1(4050) + and Z 2(4250) + states, reported by the Belle Collaboration, decaying to χ c1π + in the decays B ̄0→χ c1K -π + and B +→χ c1KS0π + where χ c1→J/ψγ. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e +e - collider operating at center-of-mass energy 10.58 GeV, and correspond to an integrated luminosity of 429fb -1. In this analysis, we model the background-subtracted, efficiency-corrected χ c1π + mass distribution using the Kπ mass distribution and the corresponding normalized Kπ Legendre-polynomial moments, and then test the need for the inclusion of resonant structures in the description of the χ c1π + mass distribution. No evidence is found for the Z 1(4050) + and Z 2(4250) + resonances, and 90% confidence level upper limits on the branching fractions are reported for the corresponding B-meson decay modes.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2012
85
5
052003
none
Lees, J., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., et al. (2012). Search for the Z 1(4050) + and Z 2(4250) + states in B ̄0→χ c1K -π + and B +→χ c1KS0π +. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85(5) [10.1103/PhysRevD.85.052003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389271
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