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oaioai:saitama-med.repo.nii.ac.jp:00000057

ANGULAR DISTRIBUTIONS OF HIGH-MASS DILEPTONS WITH SOFT-GLUON EMISSION EFFECTS

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Publication date
30 June 1982
Publisher
Department of Physics, Kaduna State University

Abstract

The angular distributions for dileptons arising from decays of a virtual photon and the Z°-boson produced in pp collision are calculated at large mass M and finite transverse momentum QT of dileptons with A≪QT≪M, taking into account the soft-gluon emission effects in all orders of a_s (in double leading-logarithm approximation). Numerical evaluation for the differential cross-section dσ/dMdydQT^2 and the coefficient of parity-violating term ξ(M, QT) in the angular distribution is carried out for pp collision at √=540 GeV and y=0 in the limit QT/M→0 in the Gottfried-Jackson reference frame. We point out that the soft-gluon emission effects in the coefficient ξ(M, QT) are deeply related to the scale-violation effects in the parton distribution

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