Open Charm Production in p + p and Pb + Pb collisions at the CERN Large Hadron Collider

Topor, Pop V. and Gyulassy, Miklós Pál and Barrette, J. and Gale, C. and Petrovici, M. (2014) Open Charm Production in p + p and Pb + Pb collisions at the CERN Large Hadron Collider. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 41. ISSN 0954-3899

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Abstract

Effects of strong longitudinal colour electric fields (SCF), shadowing, and quenching on the open prompt charm mesons (D 0 , D +, D ∗ +, D s +) production in central Pb + Pb collisions at √ sNN = 2.76 TeV are investigated within the framework of the HIJING/BB v2.0 model. We compute the ¯ nuclear modification factor R D PbPb, and show that the above nuclear effects constitute important dynamical mechanisms in the description of experimental data. The strength of colour fields (as characterized by the string tension κ), partonic energy loss and jet quenching process lead to a suppression factor consistent with recent published data. Predictions for future beauty mesons measurements have been included. Ratios of strange to non-strange prompt charm mesons in central Pb + Pb and minimum bias (MB) p + p collisions at 2.76 TeV are also discussed. Minimum bias p + p collisions which constitute theoretical baseline in our calculations are studied at the centre of mass energies √ s = 2.76 TeV and 7 TeV.

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