Ghost contributions to charmonium production in polarized high-energy collisions

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dc.creatorKlasen, M.
dc.creatorKniehl, B. A.
dc.creatorMihaila, L. N.
dc.creatorSteinhauser, M.
dc.date2008-02-26
dc.date.accessioned2026-07-07T11:40:30Z
dc.date.available2026-07-07T11:40:30Z
dc.descriptionIn 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.
dc.description5 pages
dc.identifierhttps://arxiv.org/abs/0802.3833
dc.identifierhttp://arxiv.org/abs/0802.3833
dc.identifierPhys.Rev.D77:117501,2008
dc.identifierdoi:10.1103/PhysRevD.77.117501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200275
dc.subjectHigh Energy Physics - Phenomenology
dc.titleGhost contributions to charmonium production in polarized high-energy collisions
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