Article
Measurement of Elastic Υ Photoproduction at HERA
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Document Type
Article
Publication Date
10-8-1998
Disciplines
Abstract
The photoproduction reaction γp → μ+ μ-p has been studied in ep interactions using the ZEUS detector at HERA. The data sample corresponds to an integrated luminosity of 43.2pb-1. The Υ meson has been observed in photoproduction for the first time. The sum of the products of the elastic Υ(1S), Υ(2S),Υ(3S) photoproduction cross sections with their respective branching ratios is determined to be 13.3 ± 6.0(stat.)-2.3+2.7(syst.) pb at a mean photon-proton centre of mass energy of 120 GeV. The cross section is above the prediction of a perturbative QCD model. © 1998 Elsevier Science B.V. All rights reserved.
DOI
https://doi.org/10.1016/S0370-2693(98)01081-8
First Department
Physics
Acknowledgements
Accepted version retrieved July 19, 2021 from https://arxiv.org/pdf/hep-ex/9807020.pdf
Citation Information
J. Breitweg, M. Derrick, D. Krakauer, S. Magill, et al.. "Measurement of Elastic Υ Photoproduction at HERA" Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics Vol. 437 Iss. 3-4 (1998) p. 432 - 444 Available at: http://works.bepress.com/margarita_mattingly/103/