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arXiv · 1104.1781

The momentum distribution of J/psi in B decays

TJ Burns·F Piccinini·AD Polosa·V Prosperi·C Sabelli
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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.

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TJ Burns, F Piccinini, AD Polosa, V Prosperi, C Sabelli. 2011-05-25. The momentum distribution of J/psi in B decays. https://doi.org/10.1103/physrevd.83.114029

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