Single transverse spin asymmetries

Qiu, Jian-wei; Sterman, George F.

doi:10.1103/PhysRevLett.67.2264

Single transverse spin asymmetries

Jul 30, 1991

14 pages

Published in:

Phys.Rev.Lett. 67 (1991) 2264-2267

DOI:

10.1103/PhysRevLett.67.2264

Report number:

ITP-SB-91-8

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Abstract: (APS)

Using generalized factorization theorems, we calculate the leading single transverse spin asymmetry for high transverse-momentum direct-photon production in pp collisions, in terms of partonic matrix elements. The leading contribution comes from a ‘‘twist-3’’ parton distribution, involving the correlation between quark fields and the gluonic field strength. With simple assumptions for this matrix element, the asymmetry increases with xF, naturally giving effects of 10% or more at large xF.

p p: inclusive reaction
p: polarization
polarization: p
polarization: transverse
transverse: polarization
spin: asymmetry
asymmetry: spin
photon: hadroproduction
hadroproduction: photon
photon: direct production

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