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preprints:2008:ttp08-10 [2016/03/17 11:03] (current)
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 +====== TTP08-10 Ghost contributions to charmonium production in polarized high-energy collisions. ====== 
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 +   <​hidden TTP08-10 ​ Ghost contributions to charmonium production in polarized high-energy collisions. > In a previous paper [Phys. Rev. D 68, 034017 (2003)], we investigated the inclus 
 + ive 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 longitu 
 + ​dinal-spin asymmetry A_{LL}. For convenience,​ we adopted a simplified expression 
 +  for the tensor product of the gluon polarization four-vector with its charge co 
 + ​njugate,​ at the expense of allowing for ghost and anti-ghosts to appear as exter 
 + nal particles. While such ghost contributions cancel in the cross section asymme 
 + try 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,​ the 
 + y are provided in this addendum. 
 + </​hidden>​ 
 +|**M. Klasen, B.A. Kniehl, L. Mihaila, and M. Steinhauser** ​ |  
 +|**  Phys.Rev. ​  D77 117501 2008  **  | 
 +| {{preprints:​2008:​ttp08-10.pdf|PDF}} {{preprints:​2008:​ttp08-10.ps|PostScript}} [[http://​arxiv.org/​abs/​0802.3833|arXiv]] ​  | 
 +| |