In:
The European Physical Journal C, Springer Science and Business Media LLC, Vol. 82, No. 4 ( 2022-04)
Abstract:
Angular correlations of heavy-flavour and charged particles in high-energy proton–proton collisions are sensitive to the production mechanisms of heavy quarks and to their fragmentation as well as hadronisation processes. The measurement of the azimuthal-correlation function of prompt D mesons with charged particles in proton–proton collisions at a centre-of-mass energy of $$\sqrt{s} = 13$$ s = 13 TeV with the ALICE detector is reported, considering $$\mathrm D^{0} $$ D 0 , $$\mathrm D^{+} $$ D + , and $$\mathrm D^{*+} $$ D ∗ + mesons in the transverse-momentum interval $$3 〈 p_{\mathrm{T}} 〈 36$$ 3 〈 p T 〈 36 GeV/ $$c$$ c at midrapidity ( $$|y| 〈 0.5$$ | y | 〈 0.5 ), and charged particles with $$p_{\mathrm{T}} 〉 0.3$$ p T 〉 0.3 GeV/ $$c$$ c and pseudorapidity $$|\eta | 〈 0.8$$ | η | 〈 0.8 . This measurement has an improved precision and provides an extended transverse-momentum coverage compared to previous ALICE measurements at lower energies. The study is also performed as a function of the charged-particle multiplicity, showing no modifications of the correlation function with multiplicity within uncertainties. The properties and the transverse-momentum evolution of the near- and away-side correlation peaks are studied and compared with predictions from various Monte Carlo event generators. Among those considered, PYTHIA8 and POWHEG+PYTHIA8 provide the best description of the measured observables. The obtained results can provide guidance on tuning the generators.
Type of Medium:
Online Resource
ISSN:
1434-6052
DOI:
10.1140/epjc/s10052-022-10267-3
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
1397769-6
detail.hit.zdb_id:
1459069-4