Possible solution of the J/psi production puzzle

Details Possible solution of the J/psi production puzzle Possible solution of the J/psi production puzzle

2007-09-21

arxiv.org/abs/0709.3471v2

Phys.Rev.Lett.100:032006,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures; version (with minor text revisions) as published in PRL

Scientific paper

10.1103/PhysRevLett.100.032006

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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