NLO corrections and contribution of a tensor gluon operator to the process $γ^*γ\to ππ$
| dc.creator | Kivel, N. | |
| dc.creator | Mankiewicz, L. | |
| dc.creator | Polyakov, M. V. | |
| dc.date | 1999-08-12 | |
| dc.date | 1999-09-28 | |
| dc.date.accessioned | 2026-07-07T12:03:33Z | |
| dc.date.available | 2026-07-07T12:03:33Z | |
| dc.description | We have calculated the NLO corrections for the leading twist amplitude of the reaction $γ^*γ\toππ$ at large virtuality of the photon and at $W^2\ll Q^2$. With a simple model for the two-pion quark and gluon distribution amplitudes we have estimated that the NLO effects may reduce the leading-order amplitude by as much as 30%. We have found that besides the usual twist-2 quark and gluon operators the NLO amplitude receives contribution from a distribution associated with twist-2 tensor gluon operator. The new gluon distribution can be investigated by studying the azimuthal asymmetry of the cross section for $e+γ\to e'+ππ$. | |
| dc.description | 12 pages, 5 figures, some misprints corrected, one new reference added, some improvements due to comments which we have received recently have been incorporated | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9908334 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9908334 | |
| dc.identifier | Phys.Lett.B467:263-270,1999 | |
| dc.identifier | doi:10.1016/S0370-2693(99)01148-X | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207822 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | NLO corrections and contribution of a tensor gluon operator to the process $γ^*γ\to ππ$ | |
| dc.type | text |