Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-03-24
Nucl.Phys. B559 (1999) 323-338
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 8 eps figues
Scientific paper
10.1016/S0550-3213(99)00413-7
We present a next-to-leading order calculation of jet production in gamma^*gamma collisions from e+e- scattering in a region where the virtuality Q^2 of the probing virtual photon is small compared to the transverse jet energy. The calculation is based on the phase-space slicing method. The initial state singularity of the virtual photon is factorized into the structure function of the virtual photon, using the MS-bar factorization scheme for virtual photons. Numerical results are presented for LEP2 conditions. The perturbative stability of the pure direct virtual photon approach is compared to that of including resolved virtual photons in different regions of Q^2. We make predictions for cross sections which suggest that different parametrizations of virtual photon parton densities should be distinguishable by measurements of jet cross sections at LEP.
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