ZhETF, Vol. 122,
p. 472 (September 2002)
(English translation - JETP,
Vol. 95, No. 3,
available online at www.springer.com
(QUASI)ELASTIC ELECTRON-MUON LARGE-ANGLE SCATTERING WITHIN THE TWO-LOOP APPROXIMATION: VERTEX CONTRIBUTIONS
Bytev V.V., Kuraev E.A., Shaikhatdenov B.G.
Received: April 12, 2002
PACS: 11.80.-m, 13.10.+q, 13.65.+i
We consider quasielastic large-angle electron-muon scattering at high energies with radiative corrections up to the two-loop level. The lowest-order radiative corrections arising from the one-loop virtual photon emission and a real soft emission are presented within a power accuracy. Two-loop corrections are supposed to be of three gauge-invariant classes. One of them, the so-called vertex contribution, is given in the logarithmic approximation. Relation to the renormalization group approach is discussed.