Aspects of χ and ψ production in polarized proton-proton collisions

M. A. Doncheski, R. W. Robinett

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Several topics of relevance to low transverse momentum ψ and χ1,2(c {Mathematical expression}) production in polarized proton-proton collisions are discussed. The leading O(αS3) contributions to the low pT χ1 production cross-sections via gg, qg, and q {Mathematical expression} initial states are calculated as well as the corresponding spin-spin asymmetries. We find that χ1 production increases relative to direct ψ and χ2 production, providing up to 25% of the observable e*e- pairs arising from ψ decays in pp collisions at √s=500 GeV. The spin-dependence of χ1 production, however, is much smaller than for either direct ψ or χ2 production and so will likely be far less useful than either process in probing the polarized gluon structure function of the proton. A subset of the O(αS3) radiative corrections to χ2 production involving initial state quarks are also performed and compared to leading order gg→χ2 predictions.

Original languageEnglish (US)
Pages (from-to)611-617
Number of pages7
JournalZeitschrift für Physik C Particles and Fields
Issue number4
StatePublished - Dec 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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