Single spin asymmetry for $p^{\uparrow}p \to πX$ in perturbative QCD

Details Single spin asymmetry for $p^{\uparrow}p \to πX$ in perturbative QCD Single spin asymmetry for $p^{\uparrow}p \to πX$ in perturbative QCD

1995-03-10

arxiv.org/abs/hep-ph/9503290v2

Phys.Lett. B362 (1995) 164-172

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages + 1 figure, plain LaTeX, figure appended as uuencoded, compressed postscript file. Revised version, to be published i

Scientific paper

10.1016/0370-2693(95)01168-P

Within the QCD-improved parton model and assuming the factorization theorem to hold in the helicity basis and for higher twist contributions, we show how non zero single spin asymmetries in hadron-hadron high energy and moderately large $p_T$ inclusive processes can be obtained, even in massless perturbative QCD, provided the quark intrinsic motion is taken into account. A simple model is constructed which reproduces the main features of the data on the single spin asymmetry observed in inclusive pion production in $p\,p$ collisions.

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