Open and Hidden Charm Production in 920 GeV Proton-Nucleus Collisions
U. Husemann (for the HERA-B Collaboration)
TL;DR
This paper reports on measurements of charmonium and open charm production in 920 GeV proton-nucleus collisions, providing insights into nuclear effects and cross sections relevant for understanding QCD in nuclear environments.
Contribution
It presents new experimental data on charmonium and open charm production cross sections and nuclear suppression effects at high energies.
Findings
J/psi suppression observed in nuclear media
Differential distributions of J/psi and open charm cross sections provided
Cross section ratios for open charm mesons measured
Abstract
The HERA-B collaboration has studied the production of charmonium and open charm states in collisions of 920 GeV protons with wire targets of different materials. The acceptance of the HERA-B spectrometer covers negative values of xF up to xF=-0.3 and a broad range in transverse momentum from 0.0 to 4.8 GeV/c. The studies presented in this paper include J/psi differential distributions and the suppression of J/psi production in nuclear media. Furthermore, production cross sections and cross section ratios for open charm mesons are discussed.
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