The momentum distribution of J/psi in B decays

Abstract

The discrepancy between theory and data in the momentum distribution of slow J/psi in B decays has been several times addressed as a puzzle. Using the most recent results on exclusive B decays into J/psi 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.

4 pages, 2 figures, 2 tables. To appear in Physical Review D

References in corpus (2)

• Evidence for the decay X(3872) --> J/psi omega
• Study of the K+ pi+ pi- Final State in B+ -> J/psi K+ pi+ pi- and B+ -> psi-prime K+ pi+ pi-

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• Determining CP violation angle $\gamma$ with B decays into a scalar/tensor meson