PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - QCD and Hadronic Physics
Dissociative production of vector mesons within the energy-dependent hot-spot model
D. Bendova,* J. Cepila, J.G. Contreras
*corresponding author
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Pre-published on: June 10, 2020
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We present a model with which we predict the cross sections for the exclusive and the dissociative photo- and electroproduction of light and heavy vector mesons off protons; the model describes correctly available experimental data. The model is based on the color-dipole approach and incorporates geometric fluctuations of the target-proton partonic structure. The fluctuations are generated as randomly placed areas of high gluonic density, so-called hot spots, in the impact-parameter plane, with the number of hot spots being energy-dependent. A striking feature of the model is the prediction of a maximum of the dissociative cross section as a function of the center-of-mass energy W_{\gamma p}, followed by a steep decrease as the hot spots start to overlap with increasing energy.
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