$2γ$ and $3γ$ annihilation as calibration processes for high energy $e^+ e^-$ colliders

Details $2γ$ and $3γ$ annihilation as calibration processes for high energy $e^+ e^-$ colliders $2γ$ and $3γ$ annihilation as calibration processes for high energy $e^+ e^-$ colliders

2008-01-10

arxiv.org/abs/0801.1592v1

JETP Lett.87:73-77,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figure

Scientific paper

10.1007/s11448-008-2002-8

Born differential cross sections and the lowest-order radiative correction to them are obtained in the kinematics of large-angle final photons emission in high-energy electron-positron annihilation processes. Taking into account possible emission of real soft and hard photons in collinear kinematics we show the validity of the Drell-Yan form of differential cross section with the nonsinglet structure functions of initial leptons. The leading and next-to leading contribution to the cross sections is obtained. The relevant numerical estimations are presented.

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