Search for the Z(4430)(-) at BABAR

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 413  fb−1. Each Kπ− mass distribution exhibits clear K∗(892) and K∗2(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−K⎯⎯⎯0,Z−→J/ψπ−)<1.5×10−5, ℬ(B0→Z−K+,Z−→J/ψπ−)<0.4×10−5, ℬ(B−→Z−K⎯⎯⎯0,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.