Parton distributions in the photon |
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| Authors: | P. Aurenche J. -P. Guillet M. Fontannaz |
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| Affiliation: | 1. Laboratoire de Physique Théorique ENSLAPP Groupe d'Annecy, LAPP, IN2P3-CNRS, B. P. 110, F-74941, Annecy-le-Vieux Cedex, France
2. Laboratoire de Physique Théorique et Hautes Energies, Université de Paris XI, Batiment 211, 91405, Orsay Cedex, France
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| Abstract: | We discuss in detail the photon structure function beyond the leading logarithm approximation. Of special concern is the factorization scheme and the hadronic input; we show how to naturally absorb large terms due to the factorization scheme in a modified hadronic component. The effect of the charm quark mass threshold is also discussed in relation to the phenomenology. A comparison with data shows that the modified hadronic component can be reasonably described by a VDM-type input.URA 14-36 du CNRS, associée à l'Ecole Normale Supérieure de Lyon, et au Laboratoire d'Annecy-le-Vieux de Physique des Particules |
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