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| HAL : in2p3-00000658, version 1 |
| arXiv : hep-ph/9805380 |
| DOI : 10.1103/PhysRevLett.81.1782 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review Letters 81 (1998) 1782-1785 |
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| Probing partonic structure in $\gamma* \gamma \longrightarrow \pi \pi$ near threshold. |
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| M. DiehlT. Gousset1B. PireO. Teryaev |
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| (1998) |
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| Hadron pair production gamma* gamma -> h hbar in the region where the c.m. energy is much smaller than the photon virtuality can be described in a factorized form, as the convolution of a partonic handbag diagram and generalized distribution amplitudes which are new non-perturbative functions describing the exclusive fragmentation of a quark-antiquark pair into two hadrons. Scaling behavior and a selection rule on photon helicity are signatures of this mechanism. The case where h is a pion is emphasized. |
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| 1 : | SUBATECH - Laboratoire SUBATECH Nantes |
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| Thème(s) | : | Physique/Physique des Hautes Energies - Phénoménologie |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/hep-ph/9805380 |
| in2p3-00000658, version 1 | |
| http://hal.in2p3.fr/in2p3-00000658 | |
| oai:hal.in2p3.fr:in2p3-00000658 | |
| Contributeur : Peggy Bardon | |
| Soumis le : Vendredi 5 Mai 2006, 11:56:09 | |
| Dernière modification le : Vendredi 5 Mai 2006, 13:32:38 | |
