Open charm production in p + p and Pb + Pb collisions at the CERN Large Hadron Collider

Abstract

Effects of strong longitudinal color electric fields, shadowing, and quenching on the production of prompt open charm mesons (D 0 , D + , D + * , D + s ) in central Pb + Pb collisions at s NN = 2.76 TeV are investigated within the framework of the HIJING/BB ¯v2.0 model. We compute the nuclear modification factor R PbPb D , and show that the above nuclear effects constitute important dynamical mechanisms in the description of experimental data. The strength of color 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 beauty mesons are presented. In addition, 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. MB + p p collisions which constitute a theoretical baseline in our calculations are studied at centre of mass energies s = 2.76 TeV and 7 TeV.

Multiplicity-dependent pT distributions of identified particles in pp collisions at 7 TeV within the HIJING/ BB¯Pop1, Petrovici2 2018Phys. Rev. C1000View full textAdd to dashboardCite

“…Therefore, κ 2 ∝ (dN ch /dη) η=0 and κ ∝ Q sat,p , similar to the CGC model, as discussed in Ref. [60]. The energy dependence of the chargedparticle density at midrapidity in pp collisions up to the LHC energies was described using a power law dependence,…”

“…The HIJING 1.0 model has been discussed in detail in our previous papers [59,60,63]. Here, we briefly summarize the main assumptions and parameters determined as in Ref.…”

“…Heavy ion jet interacting (HIJING)-type models [32,33], HIJING2.0 [53,54], and HIJING/BB v2.0 [55][56][57][58][59][60][61][62][63][64][65] were developed in order to explain the hadron production in pp, p-A, and A-A collisions. These approaches are based on a two-component geometrical model of minijet production and soft interaction and incorporate nuclear effects such as shadowing and jet quenching, via final-state jet medium interaction.…”

“…The typical field strength of SLCF at ultrarelativistic energies, in a scenario with QGP phase transition, was estimated to be about 5-12 GeV/fm [67]. Global observables and identified particle (ID) data, including (multi)strange particles production in pp [59,60,63] p-Pb [62,64,65], and Pb-Pb collisions [61] at the LHC energies were successfully described by the HIJING/BB v2.0 model. However, correlations among different measurable quantities in multiparticle production offer a better way to constrain the models.…”

K*(892)0andϕ(1020)production in Pb-Pb collisions atAbelev1, Adam2, Adamová3 et al. 2015Phys. Rev. C

“…This model is able to reproduce the measured £2 yield within about 30% [71], but does not reproduce the shape of the p t distribution. The £2/0 ratio predicted by the HIJING/BB v2.0 model [80,81,83,84], with a strong color field and a string tension of k = 1.8 GeV/fm, reproduces neither the shape nor the values of the measured data. A larger string tension of k = 5.1 GeV/fm gives a predicted £2/0 ratio (not shown) that is at least a factor of three larger than the measured ratio.…”