Studying charm hadronisation into baryons with azimuthal correlations of Λc+ with charged particles in pp collisions at root s=13TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00386665" target="_blank" >RIV/68407700:21340/25:00386665 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2025.139681" target="_blank" >https://doi.org/10.1016/j.physletb.2025.139681</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2025.139681" target="_blank" >10.1016/j.physletb.2025.139681</a>

Result language

angličtina

Original language name

Studying charm hadronisation into baryons with azimuthal correlations of Λc+ with charged particles in pp collisions at root s=13TeV

Original language description

The distribution of angular correlations between prompt charm hadrons and primary charged particles in pp collisions is sensitive to the charm-quark hadronisation process. In this letter, charm-baryon correlations are measured for the first time by studying the azimuthal-angle difference between charged particles and prompt Lambda(+)(c) baryons produced in pp collisions at a centre-of-mass energy of root s=13 TeV, with the ALICE detector. Lambda(+)(c) baryons are reconstructed at midrapidity (|y|<0.5) in the transverse-momentum interval 3<p(T)<16 GeV/c, and correlated with charged particles with p(T)>0.3 GeV/c and pseudorapidity |eta|<0.8. For 3<p(T)(Lambda c+,D)<5 GeV/c, the comparison with published measurements of D-meson and charged-particle correlations in the same collision system hints at a larger number of low-momentum particles associated with Lambda(+)(c)-baryon triggers than with D-meson triggers, both in the collinear and opposite directions with respect to the trigger particle. These differences can be quantified by the comparison of the properties of the near- and away-side correlation peaks, and are not reproduced by predictions of various Monte Carlo event generators, generally underpredicting the associated particle yields at p(T)(assoc)<1 GeV/c. This tension between Lambda(+)(c)-baryon and D-meson associated peak yields could suggest a modified fragmentation of the charm quark, or a different hadronisation process, when a charm baryon is produced in the final state.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

<a href="/en/project/LM2023040" target="_blank" >LM2023040: Research infrastructure for experiments at CERN</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

868

Issue of the periodical within the volume

Sep

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

18

Pages from-to

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UT code for WoS article

001530260100005

EID of the result in the Scopus database

2-s2.0-105009471468