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Inelastic Leptoproduction of J/psi Mesons at HERA |
| Reference |
N.N., to be presented at DIS 2002, Spring 2002 |
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| Contact |
B.Naroska |
| Abstract |
The leptoproduction of J/psi mesons is studied in inelastic reactions for four momentum transfers 2 < Q^2 < 100 GeV^2. The data were taken with the H1 detector at the electron proton collider HERA and correspond to an integrated luminosity of 77 pb^-1 . Single differential and double differential cross sections are measured with increased precision compared to previous analyses. New leading order calculations within the non-relativistic QCD factorization approach including colour octet and colour singlet contributions are compared to the data and are found to give a reasonable description of most distributions within errors. An exception is the shape of the J/psi fractional energy, z, which deviates significantly from the data. Comparisons to photoproduction are made and the polarisation of the produced J/psi mesons is analysed. |
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