Complete next-to-leading-order corrections to J/psi photoproduction in nonrelativistic quantum chromodynamics

Details Complete next-to-leading-order corrections to J/psi photoproduction in nonrelativistic quantum chromodynamics Complete next-to-leading-order corrections to J/psi photoproduction in nonrelativistic quantum chromodynamics

2009-09-15

arxiv.org/abs/0909.2798v2

Phys.Rev.Lett.104:072001,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures; minor changes to the text, references added and updated, preliminary H1 data replaced by final ones; accep

Scientific paper

10.1103/PhysRevLett.104.072001

We calculate the cross section of inclusive direct J/psi photoproduction at next-to-leading order within the factorization formalism of nonrelativistic quantum chromodynamics, for the first time including the full relativistic corrections due to the intermediate ^1S_0^[8], ^3S_1^[8], and ^3P_J^[8] color-octet states. A comparison of our results to recent H1 data suggests that the color octet mechanism is indeed realized in J/psi photoproduction, although the predictivity of our results still suffers from uncertainties in the color-octet long-distance matrix elements.

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