Spin effects in high-energy photon-hadron scattering in QCD

Journal Article · Fri Sep 01 00:00:00 EDT 1995 · Physics of Atomic Nuclei

OSTI ID:161639

Goloskokov, S V ^[1]; Listopadov, O A ^[2]

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1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
2. Frantsiask Skorina State Univ., Gomel (Belarus)

Spin effects at high energies and momentum transfers {vert_bar}t{vert_bar} > 1 GeV{sup 2} are analyzed for elastic quark-photon scattering. The ratio of the spin-flip and non-spin-flip amplitudes in the same order of perturbative QCD is found to be independent of energy. It is shown that the contribution of the spin-dependent quark-pomeron vertex to the photon spin-flip amplitude is enhanced by off-mass-shell effects in the quark loop. As a result, this amplitude can become as large as 20-30% of the non-spin-flip amplitude. The cross section is found to depend on the form factor and on contributions of order {alpha}{sub s}{sup 3} the non-spin-flip amplitude. 12 refs., 4 figs.

• OSTI ID: 161639
• Journal Information: Physics of Atomic Nuclei, Vol. 58, Issue 9; Other Information: PBD: Sep 1995; TN: Translated from Yadernaya Fizika; 58: No. 9, 1695-1700(1995)
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
PHOTON-HADRON INTERACTIONS
SCATTERING
QUARK MODEL
QUANTUM CHROMODYNAMICS
SPIN FLIP
MOMENTUM TRANSFER
QUARK-QUARK INTERACTIONS