H1 Collaboration, . and Aktas, A. and Sloan, T. and Henderson, R. , et al. (2003) Diffractive photoproduction of J/ψ mesons with large momentum transfer at HERA. Physics Letters B, 568 (3-4). pp. 205-218. ISSN 0370-2693
Full text not available from this repository.Abstract
The diffractive photoproduction of J/ψ mesons is measured with the H1 detector at the ep collider HERA using an integrated luminosity of 78 pb−1. The differential cross section dσ(γp→J/ψY)/dt is studied in the range 2<|t|<30 GeV2, where t is the square of the four-momentum transferred at the proton vertex. The cross section is also presented as a function of the photon–proton centre-of-mass energy Wγp in three t intervals, spanning the range 50<Wγp<200 GeV. A fast rise of the cross section with Wγp is observed for each t range and the slope for the effective linear Pomeron trajectory is measured to be ′=−0.0135±0.0074(stat.)±0.0051(syst.) GeV−2. The measurements are compared with perturbative QCD models based on BFKL and DGLAP evolution. The data are found to be compatible with s-channel helicity conservation.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Physics Letters B |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 10552 |
| Deposited By: | Mrs Yaling Zhang |
| Deposited On: | 17 Jul 2008 13:42 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 14:50 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/10552 |
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