TTP02-03 The radiative return at small angles: virtual corrections

TTP02-03 The radiative return at small angles: virtual corrections

TTP02-03 The radiative return at small angles: virtual corrections

Virtual corrections for electron–positron annihilation into one real and one off-shell photon of invariant mass $Q^2$ are evaluated. Special attention is paid to those configurations where the real photon is collinear with the beam direction. This calculation is an important ingredient of a Monte Carlo program, which simulates events with tagged photons from initial-state radiation, including NLO corrections.

G. Rodrigo, H. Czyz, J. H. K\“uhn and M. Szopa
Eur.Phys.J. C25 215-222 2002
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