Jet fragmentation via azimuthal angular correlations of heavy-flavours in $pp$ collisions at $\sqrt{s} = $ 7 TeV

Abstract

Measurements in heavy-flavour azimuthal angular correlation provide insight into the production, propagation, and hadronization of heavy-flavour jets in ultra-relativistic hadronic and heavy-ion collisions. These measurements across different particle species help to isolate the possible modification in particle production and fragmentation due to different mass and quark contents. Jet correlation studies give direct access to the initial parton dynamics produced in these collisions. \\ This article studies the azimuthal angular correlations of heavy-flavour hadrons (charm and beauty mesons and charm baryons) in pp collisions at $\sqrt{s} =$ 7 TeV using PYTHIA8. We study the production of heavy-flavour jets with different parton-level processes, including multi-parton interactions and different color reconnection prescriptions. The heavy-flavour hadrons correlations are calculated in the different triggers and associated \pt intervals to characterize the impact of hard and soft scattering. The yields and the widths associated with the near-side (NS) and away-side (AS) correlation peaks are calculated and studied as a function of associated \pt for different trigger \pt ranges.