Published June 2009 | Version Published
Journal Article Open

Search for the Z(4430)^- at BABAR

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Abstract

We report the results of a search for Z(4430)^- decay to J/Ψ π^- or Ψ(2S)π^- in B(^-.0)→ J/Ψ π^-K^(0.+) and B^(-.0) → Ψ(2S)π^-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 π^- 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 π^- scattering amplitude measurements. Each K π^- angular distribution varies significantly in structure with K π^- mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/Ψ π^- or Ψ (2S)π^- mass distribution is well described by the reflection of the measured K π^- 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/Ψ π^- or Ψ(2S) π^- mass distribution, nor in the corresponding distributions for the regions of K π- mass for which observation of the Z(4430)^- signal was reported. We obtain branching-fraction upper limits [script B](B^- → Z^-[overline K]^0,Z^- → J/Ψ π^-)<1.5×10^(-5), [script B](B^0 → Z^-K^+,Z^- → J/Ψ π^-)<0.4×10^(-5), [script B](B → Z-[overline K]0,Z → Ψ(2S)π-)<4.7×10-5, and [script B](B^0 → 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

Additional Information

© 2009 The American Physical Society. Received 5 November 2008; published 1 June 2009. 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 Educaciόn 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.

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

Identifiers

Eprint ID
16854
Resolver ID
CaltechAUTHORS:20091202-084451546

Funding

U.S. Department of Energy
NSF
Natural Sciences and Engineering Research Council (Canada)
Commissariat à l'Energie Atomique (France)
Institut National de Physique Nucléaire et de Physique des Particules (France)
Bundesministerium für Bildung und Forschung (Germany)
Deutsche Forschungsgemeinschaft (Germany)
Istituto Nazionale di Fisica Nucleare (Italy)
Foundation for Fundamental Research on Matter (The Netherlands)
Research Council of Norway
Ministry of Education and Science of the Russian Federation
Ministerio de Educaciόn y Ciencia (Spain)
Science and Technology Facilities Council (United Kingdom)
Marie-Curie IEF program (European Union)
A. P. Sloan Foundation

Dates

Created
2009-12-14
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Updated
2021-11-08
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