Single transverse spin asymmetries in hadronic pion production

Qiu, Jian-wei; Sterman, George F.

doi:10.1103/PhysRevD.59.014004

Single transverse spin asymmetries in hadronic pion production

Jian-wei Qiu
(
- Brookhaven
)
,
George F. Sterman
(
- SUNY, Stony Brook
)

Jun, 1998

52 pages

Published in:

Phys.Rev.D 59 (1999) 014004

e-Print:

hep-ph/9806356 [hep-ph]

DOI:

10.1103/PhysRevD.59.014004

Report number:

ITP-SB-98-28,
BNL-HET-98-17

View in:

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Abstract: (arXiv)

We analyze single transverse-spin asymmetries for hadronic pion production at large transverse momenta using QCD factorization. In the large

x_F

region, leading contributions to the asymmetries are naturally produced by twist-3 parton correlation functions that couple quark fields and gluon field strengths. With a simple model for these matrix elements, leading-order asymmetries calculated from QCD are consistent with data on pion production from Fermilab, and can be used to predict single-spin asymmetries at RHIC. We argue that our perturbative calculation for the asymmetries is relevant to pion transverse momenta as low as a few GeV.

Note:

Revtex, 52 pages, 29 figures, 2 tables

hadron hadron: inclusive reaction
p p: inclusive reaction
anti-p p: inclusive reaction
p: polarized beam
anti-p: polarized beam
polarization: transverse
pi: hadroproduction
spin: asymmetry
transverse momentum: high
quantum chromodynamics: factorization

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