A study of charm quark correlations in ultra-relativistic $p$ + $p$ collisions with PYTHIA

Abstract

Measurements of heavy flavor quark (charm and bottom) correlations in heavy ion collisions are instrumental to understand the flavor dependence of energy loss mechanisms in hot and dense QCD media. Experimental measurements of these correlations in baseline $p$+$p$ collisions are crucial to understand the contributions of perturbative and non-perturbative QCD processes to the correlation functions and further help in interpreting correlation measurements in heavy ion collisions. In this paper, we investigate $D$-$\bar{D}$ meson correlations and $D$ with one particle from $D$ meson decay daughter correlations using PYTHIA Event Generator in $p$ + $p$ collisions at $\sqrt{s}$ = 200, 500 and 5500 GeV. Charm/bottom events are found to contribute mainly to the away side/near side pattern of $D$-electron correlations, respectively. In the energy region of RHIC, $D$-$\bar{D}$ correlations inherit initial $c$-$\bar{c}$ correlations and $B\to DX$ decay contribution is insignificant. Furthermore, Bottom quark correlations are suggested to be applicable at LHC energy, as the bottom contributions on $D$ related correlations are relatively large.

arXiv comment7 pages, 6 figures

Cited by in corpus (4)

• Modeling of heavy-flavor pair correlations in Au-Au collisions at 200 A GeV at the BNL Relativistic Heavy Ion Collider
• Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV
• Measurement of D${}^0$-meson + hadron two-dimensional angular correlations in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=$ 200 GeV
• Measurement of angular correlations between $\mathrm{D}$ mesons and charged particles in pp and p-Pb collisions with ALICE at the LHC