Journal article
Measurement of inelastic J/psi production in deep inelastic scattering at HERA
The European physical journal. C, Particles and fields, Vol.44(1), pp.13-25
09/01/2005
DOI: 10.1140/epjc/s2005-02346-2
Abstract
The inelastic production of J/psi mesons in ep collisions has been studied with the ZEUS detector at HERA using an integrated luminosity of 109 pb(-1). The J/psi mesons were identified using the decay channel J/psi -> mu(+)mu(-). The measurements were performed in the kinematic range 2 < Q(2) < 80 GeV2, 50 < W < 250 GeV, 0.2 < z < 0.9 and -1.6 < Y-lab < 1.3, where Q(2) is the virtuality of the exchanged photon, W is the photon-proton centre-of-mass energy, z is the fraction of the photon energy carried by the J/psi meson in the proton rest frame and Ylab is the rapidity of the J/psi in the laboratory frame. The measured cross sections are compared to theoretical predictions within the non-relativistic QCD framework including colour-singlet and colour-octet contributions, as well as to predictions based on the k(T)-factorisation approach. Calculations of the colour-singlet process generally agree with the data, whereas inclusion of colour-octet terms spoils this agreement.
Details
- Title: Subtitle
- Measurement of inelastic J/psi production in deep inelastic scattering at HERA
- Creators
- ZEUS CollaborationJ Repond (Contributor)
- Resource Type
- Journal article
- Publication Details
- The European physical journal. C, Particles and fields, Vol.44(1), pp.13-25
- DOI
- 10.1140/epjc/s2005-02346-2
- ISSN
- 1434-6044
- eISSN
- 1434-6052
- Publisher
- Springer Nature
- Number of pages
- 13
- Language
- English
- Date published
- 09/01/2005
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627234902771
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