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Investigating charm production and fragmentation via azimuthal correlations of prompt D mesons with charged particles in pp collisions at $$\mathbf {\sqrt{ s} = 13}$$ TeV
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...
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Published in: | The European physical journal. C, Particles and fields Particles and fields, 2022-04, Vol.82 (4), Article 335 |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
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Online Access: | Get full text |
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Summary: | 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. |
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ISSN: | 1434-6052 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-022-10267-3 |