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arXiv · 0709.3471

Possible solution of the J/psi production puzzle

H. Haberzettl·J. P. Lansberg
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Abstract

We argue that the s-channel cut contribution to J/psi hadroproduction can be significantly larger than the usual cut contribution of the color-singlet mechanism, which is known to underestimate the experimental measurements. A scenario accounting for intermediate $c\bar(c)$ interactions is proposed that reproduces the data at low- and mid-range transverse momenta P_T from the Fermilab Tevatron and BNL Relativistiv Heavy Ion Collider. The J/psi produced in this manner are polarized predominantly longitudinally.

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H. Haberzettl, J. P. Lansberg. 2008-02-06. Possible solution of the J/psi production puzzle. https://doi.org/10.1103/physrevlett.100.032006

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