We report the results of a search for Z(4430)- decay to J/ψπ- or ψ(2S)π- in B-,0→J/ψπ-K0,+ and B-,0→ψ(2S)π-K0,+ decays. 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 the sample corresponds to an integrated luminosity of 413fb-1. Each Kπ- mass distribution exhibits clear K*(892) and K2*(1430) signals, and the efficiency-corrected spectrum is well described by a superposition of the associated Breit-Wigner intensity distributions, together with an S-wave contribution obtained from the LASS I=1/2 Kπ- scattering amplitude measurements. Each Kπ- angular distribution varies significantly in structure with Kπ- mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/ψπ- or ψ(2S)π- mass distribution is well described by the reflection of the measured Kπ- mass and angular distribution structures. We see no significant evidence for a Z(4430)- signal for any of the processes investigated, neither in the total J/ψπ- or ψ(2S)π- mass distribution, nor in the corresponding distributions for the regions of Kπ- mass for which observation of the Z(4430)- signal was reported. We obtain branching-fraction upper limits B(B-→Z-K̄0,Z- →J/ψπ-)<1.5×10-5, B(B0→Z-K+,Z-→J/ψπ-) <0.4×10-5, B(B-→Z-K̄0,Z-→ψ(2S)π-)<4. 7×10-5, and B(B0→Z-K+,Z-→ψ(2S)π-)<3.1×10-5 at 95% confidence level, where the Z(4430)- mass and width have been fixed to the reported central values.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2009). Search for the Z(4430)- at B A B AR. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79(11) [10.1103/PhysRevD.79.112001].

Search for the Z(4430)- at B A B AR

CARPINELLI, Massimo;
2009

Abstract

We report the results of a search for Z(4430)- decay to J/ψπ- or ψ(2S)π- in B-,0→J/ψπ-K0,+ and B-,0→ψ(2S)π-K0,+ decays. 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 the sample corresponds to an integrated luminosity of 413fb-1. Each Kπ- mass distribution exhibits clear K*(892) and K2*(1430) signals, and the efficiency-corrected spectrum is well described by a superposition of the associated Breit-Wigner intensity distributions, together with an S-wave contribution obtained from the LASS I=1/2 Kπ- scattering amplitude measurements. Each Kπ- angular distribution varies significantly in structure with Kπ- mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/ψπ- or ψ(2S)π- mass distribution is well described by the reflection of the measured Kπ- mass and angular distribution structures. We see no significant evidence for a Z(4430)- signal for any of the processes investigated, neither in the total J/ψπ- or ψ(2S)π- mass distribution, nor in the corresponding distributions for the regions of Kπ- mass for which observation of the Z(4430)- signal was reported. We obtain branching-fraction upper limits B(B-→Z-K̄0,Z- →J/ψπ-)<1.5×10-5, B(B0→Z-K+,Z-→J/ψπ-) <0.4×10-5, B(B-→Z-K̄0,Z-→ψ(2S)π-)<4. 7×10-5, and B(B0→Z-K+,Z-→ψ(2S)π-)<3.1×10-5 at 95% confidence level, where the Z(4430)- mass and width have been fixed to the reported central values.
Articolo in rivista - Articolo scientifico
Scientifica
BABAR detector
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2009). Search for the Z(4430)- at B A B AR. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79(11) [10.1103/PhysRevD.79.112001].
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