Shrinkage vs. anti-shrinkage of the diffraction cone in the exclusive vector mesons production
| dc.creator | Ivanov, I. P. | |
| dc.date | 2003-04-09 | |
| dc.date.accessioned | 2026-07-07T03:49:25Z | |
| dc.date.available | 2026-07-07T03:49:25Z | |
| dc.description | We investigate the energy behavior of the diffraction cone in the exclusive vector meson production in diffractive DIS within the k_t-factorization approach. In our calculations, we make full use of fits to the unintegrated gluon structure functions extracted recently from experimental data on F_2p. Confirming early predictions, we observe that shrinkage of the diffraction cone due to the slope of the Pomeron trajectory is significantly compensated by the anti-shrinkage behavior of the gamma -> V transition. In order to match recent ZEUS data on the energy behavior of the diffraction slope, alpha^prime_eff(J/psi, exp.) = 0.115 +/- 0.018 (stat.) +0.008-0.015(syst.) GeV^-2, we had to use an input value alpha^\prime_Pomeron = 0.25 GeV^-2. We investigate the compensation effect in detail and give predictions for Q^2-dependence of the rate of cone shrinkage for different vector mesons. | |
| dc.description | 16 pages, 5 eps figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0304089 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0304089 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/42391 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Shrinkage vs. anti-shrinkage of the diffraction cone in the exclusive vector mesons production | |
| dc.type | text |