A new method for calculating jet-like QED processes

Details A new method for calculating jet-like QED processes A new method for calculating jet-like QED processes

2003-05-26

arxiv.org/abs/hep-ph/0305293v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 figures, Contribution presented by V.G. Serbo at PHOTON 2003, Frascati, Italy

Scientific paper

10.1016/S0920-5632(03)02358-2

We consider inelastic QED processes, the cross sections of which do not drop with increasing energy. Such reactions have the form of two-jet processes with the exchange of a virtual photon in the t-channel. We consider them in the region of small scattering angles m/E <= theta << 1, which yield the dominant contribution to their cross sections. A new effective method is presented to calculate the corresponding helicity amplitudes. Its basic idea consists in replacing spinor structures for real and weakly virtual intermediate leptons by simple transition vertices for real leptons. The obtained compact amplitudes are particularly suitable for numerical calculations in jet-like kinematics.

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