Eur. Phys. J. C (2011) 71: 1597
https://doi.org/10.1140/epjc/s10052-011-1597-2

Special Article - Tools for Experiment and Theory

Monte-Carlo generator photon jets for the process e ⁺ e ⁻→γγ

¹ Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russia
² Novosibirsk State University, 630090, Novosibirsk, Russia
³ Bogolubov Lab of Theor. Phys., Dubna, Moscow region, Russia

^* e-mail: G.V.Fedotovich@inp.nsk.su

Received: 21 September 2010
Revised: 28 December 2010
Published online: 9 June 2011

Abstract

Monte-Carlo generator with photon jets radiation in collinear regions for the process e ⁺ e ⁻→γγ is described in detail. Radiative corrections in the first order of α are treated exactly. Large leading logarithmic corrections coming from collinear regions are taken into account in all orders of α by applying the Structure Function approach. Theoretical precision of the cross section with radiative corrections is estimated to be 0.2%. This process is considered as an additional tool to measure luminosity in forthcoming experiments with the CMD-3 detector at the e ⁺ e ⁻ collider VEPP-2000.