Ghost contributions to charmonium production in polarized high-energy collisions
- Laboratoire de Physique Subatomique et de Cosmologie, Universite Joseph Fourier/CNRS-IN2P3/INPG, 53 Avenue des Martyrs, 38026 Grenoble (France)
- II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)
- Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, Engesserstrasse 7, 76131 Karlsruhe (Germany)
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{sub 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 ghosts and antighosts to appear as external particles. While such ghost contributions cancel in the cross section asymmetry A{sub LL} and thus were not listed in our previous paper, they do contribute to the absolute cross sections. Evaluating the latter from those formulas thus leads to erroneous results. For completeness and the reader's convenience, they are provided in this addendum. This fully reconciles our results with those obtained by M. M. Meijer, J. Smith, and W. L. van Neerven [Phys. Rev. D 77, 034014 (2008)].
- OSTI ID:
- 21205137
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 11; Other Information: DOI: 10.1103/PhysRevD.77.117501; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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