ZhETF, Vol. 130,
p. 259 (August 2006)
(English translation - JETP,
Vol. 103, No. 2,
available online at www.springer.com
RADIATIVE CORRECTIONS TO CHIRAL AMPLITUDES IN QUASIPERIPHERAL KINEMATICS
Bytev V., Bartos E., Galynskii M.V., Kuraev E.A.
Received: March 22, 2006
PACS: 11.10.Gh, 12.20.Ds, 13.60.Fz
Chiral amplitudes for two-jet processes in the quasiperipheral kinematics are calculated at the Born and one-loop correction levels. The amplitudes of subprocesses describing the interaction of a virtual and a real photon with creation of a charged fermion pair for various chiral states are considered in detail. Similar results are presented for the Compton subprocess with a virtual photon. Contributions of the emission of virtual, soft, and hard real additional photons are taken into account explicitly. The relevant cross sections expressed in terms of impact factors are in agreement with the structure-function approach in the leading logarithmic approximation. Contributions of the next-to-leading terms are presented in analytic form. Accuracy estimation is discussed.