Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-02-26
Phys.Rev.D77:117501,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages
Scientific paper
10.1103/PhysRevD.77.117501
In a previous paper [Phys. Rev. D 68, 034017 (2003)], we investigated the inclusive production of prompt J/psi mesons in polarized hadron-hadron, photon-hadron, and photon-photon collisions in the factorization formalism of nonrelativistic quantum chromodynamics providing compact analytic results for the double longitudinal-spin asymmetry A_{LL}. For convenience, we adopted a simplified expression for the tensor product of the gluon polarization four-vector with its charge conjugate, at the expense of allowing for ghost and anti-ghosts to appear as external particles. While such ghost contributions cancel in the cross section asymmetry A_{LL} and thus were not listed in our previous paper, they do contribute to the absolute cross sections. For completeness and the reader's convenience, they are provided in this addendum.
Klasen Michael
Kniehl Bernd A.
Mihaila Luminita N.
Steinhauser Matthias
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