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

  • J. P. Lees
  • , V. Poireau
  • , V. Tisserand
  • , J. Garra Tico
  • , E. Grauges
  • , M. Martinelli
  • , D. A. Milanes
  • , A. Palano
  • , M. Pappagallo
  • , G. Eigen
  • , B. Stugu
  • , D. N. Brown
  • , L. T. Kerth
  • , Yu G. Kolomensky
  • , G. Lynch
  • , H. Koch
  • , T. Schroeder
  • , D. J. Asgeirsson
  • , C. Hearty
  • , T. S. Mattison
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Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number052003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number5
DOIs
Publication statusPublished - 16 Mar 2012

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