Abstract
We report the results of a search for Z(4430)(-) decay to J/psi pi(-) or psi(2S)pi(-) in B--,B-0 -> J/psi pi K--(0,+) and B--,B-0 -> psi(2S)pi K--(0,+) 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 K pi(-) 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 K pi(-) scattering amplitude measurements. Each K pi(-) angular distribution varies significantly in structure with K pi(-) mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/psi pi(-) or psi(2S)pi(-) mass distribution is well described by the reflection of the measured K pi(-) 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/psi pi(-) or psi(2S)pi(-) mass distribution, nor in the corresponding distributions for the regions of K pi(-) mass for which observation of the Z(4430)(-) signal was reported. We obtain branching-fraction upper limits B(B--> Z(-)(K) over bar (0), Z(-)-> J/psi pi(-))<1.5x10(-5), B(B-0 -> Z(-)K(+), Z(-)-> J/psi pi(-))<0.4x10(-5), B(B--> Z(-)(K) over bar (0), Z(-)->psi(2S)pi(-))<4.7x10(-5), and B(B-0 -> Z(-)K(+), Z(-)->psi(2S)pi(-))<3.1x10(-5) at 95% confidence level, where the Z(4430)(-) mass and width have been fixed to the reported central values.
We are grateful for the extraordinary contributions of
our PEP-II colleagues in achieving the excellent luminosity
and machine conditions that have made this work possible.
The success of this project also relies critically on
the expertise and dedication of the computing organizations
that support BABAR. The collaborating institutions
wish to thank SLAC for its support and the kind hospitality
extended to them. This work is supported by the
US Department of Energy and National Science Foundation,
the Natural Sciences and Engineering Research
Council (Canada), the Commissariat à l'Energie Atomique
and Institut National de Physique Nucléaire et de
Physique des Particules (France), the Bundesministerium
für Bildung und Forschung and Deutsche Forschungsgemeinschaft
(Germany), the Istituto Nazionale di Fisica
Nucleare (Italy), the Foundation for Fundamental Research
on Matter (The Netherlands), the Research Council
of Norway, the Ministry of Education and Science of
the Russian Federation, Ministerio de Educación y Ciencia
(Spain), and the Science and Technology Facilities
Council (United Kingdom). Individuals have received
support from the Marie-Curie IEF program (European
Union) and the A. P. Sloan Foundation.
Peer reviewed