2022年4月
Investigating charm production and fragmentation via azimuthal correlations of prompt D mesons with charged particles in pp collisions at √s = 13 TeV
The European Physical Journal C
- 巻
- 82
- 号
- 4
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1140/epjc/s10052-022-10267-3
- 出版者・発行元
- Springer Science and Business Media LLC
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 $$\sqrt{s} = 13$$ TeV with the ALICE detector is reported, considering $$\mathrm D^{0} $$, $$\mathrm D^{+} $$, and $$\mathrm D^{*+} $$ mesons in the transverse-momentum interval $$3< p_{\mathrm{T } } < 36$$ GeV/$$c$$ at midrapidity ($$|y| < 0.5$$), and charged particles with $$p_{\mathrm{T } } > 0.3$$ GeV/$$c$$ and pseudorapidity $$|\eta | < 0.8$$. 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.
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 $$\sqrt{s} = 13$$ TeV with the ALICE detector is reported, considering $$\mathrm D^{0} $$, $$\mathrm D^{+} $$, and $$\mathrm D^{*+} $$ mesons in the transverse-momentum interval $$3< p_{\mathrm{T } } < 36$$ GeV/$$c$$ at midrapidity ($$|y| < 0.5$$), and charged particles with $$p_{\mathrm{T } } > 0.3$$ GeV/$$c$$ and pseudorapidity $$|\eta | < 0.8$$. 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.
- リンク情報
- ID情報
-
- DOI : 10.1140/epjc/s10052-022-10267-3
- eISSN : 1434-6052