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Momentum distribution of J/ψ in B decays

T. J. Burns1, F. Piccinini2, A. D. Polosa3, V. Prosperi3, and C. Sabelli3,1

  • 1INFN Roma, Piazzale A. Moro 2, Roma, I-00185, Italy
  • 2INFN Pavia, Via A. Bassi 6, Pavia, I-27100, Italy
  • 3Department of Physics, Università di Roma, “Sapienza”, Piazzale A. Moro 2, Roma, I-00185, Italy

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Phys. Rev. D 83, 114029 – Published 14 June, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.114029

Abstract

The discrepancy between theory and data in the momentum distribution of slow J/ψ in B decays has been several times addressed as a puzzle. Using the most recent results on exclusive B decays into J/ψ and heavy kaons or exotic mesons and reconsidering the non-relativistic-QCD calculation of the color octet fragmentation component, we show that an improvement in the comparison between data and theory can be obtained. There is still room for a better fit to data, and this may imply that new exotic mesons of the XYZ kind have yet to be discovered.

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Phys. Rev. D 83, 114029– Published 14 June, 2011
  • Received 11 April 2011

© 2011 American Physical Society

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