Predictions for ${\bar \nu} \nu \gamma$ production at LEP |
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Authors: | D Bardin |
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Institution: | (1) Lab. of Nuclear Problems, JINR, 141980 Dubna, Russia , RU;(2) Deutsches Elektronen-Synchrotron DESY, 15738 Zeuthen, Germany , DE;(3) Institute of Nuclear Physics, ul. Kawiory 26a, 30-055 Cracow, Poland , PL;(4) CERN, Theory Division, 1211 Geneva 23, Switzerland , CH |
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Abstract: | We study predictions for the reaction . The complete one-loop corrections are taken into account and higher order contributions, in particular those for the observed
real photons, are added whenever necessary. The event generator MC, a general-purpose Monte Carlo generator for the process based on the method of exclusive exponentiation, is used as the environment. We extend its applicability to the process ,, where the observation of at least a single is required. The exponentiation is implemented in much the same way as for the s-channel process alone. In particular, all photonic effects present in the case of W exchange, which cannot be included in the s-channel exponentiation scheme, are calculated to a finite order only. The real hard photon matrix element is calculated up
to . Leading logarithmic contributions of the two-loop corrections and one-loop photonic corrections accompanying real single-photon
emission are included. The electroweak corrections are calculated with the DIZET library of the ZFITTER package. Numerical
tests and predictions for typical observables are presented.
Received: 30 October 2001 / Revised version: 5 March 2002 / Published online: 22 May 2002 |
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Keywords: | |
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