Elastic and proton-dissociative photoproduction of J/ψ mesons at HERAψ

0427534 - FZÚ 2015 RIV DE eng J - Journal Article
Alexa, C. - Andreev, V. - Baghdasaryan, A. - Cvach, Jaroslav - Hladký, Jan - Reimer, Petr - Zálešák, Jaroslav … Total 173 authors
Elastic and proton-dissociative photoproduction of J/ψ mesons at HERAψ.
European Physical Journal C. Roč. 73, č. 6 (2013), s. 1-17. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT LC527; GA MŠMT LA09042
Institutional support: RVO:68378271
Keywords : cross section * photoproduction * meson J/ψ * H1 detector * HERA
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 5.436, year: 2013

Cross sections for elastic and proton-dissociative photoproduction of J/psi mesons are measured with the H1 detector in positron-proton collisions at HERA. The data were collected at ep centre-of-mass energies root s approximate to 318 GeV and root s approximate to 225 GeV, corresponding to integrated luminosities of L = 130 pb(-1) and L = 10.8 pb(-1), respectively. The cross sections are measured as a function of the photon-proton centre-of-mass energy in the range 25 < W-gamma p < 110 GeV. Differential cross sections d sigma/dt, where t is the squared four-momentum transfer at the proton vertex, are measured in the range vertical bar t vertical bar < 1.2 GeV2 for the elastic process and vertical bar t vertical bar < 8 GeV2 for proton dissociation. The results are compared to other measurements. The W-gamma p and t-dependences are parametrised using phenomenological fits.
Permanent Link: http://hdl.handle.net/11104/0233062