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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LM2023040" target="_blank" >LM2023040: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

868

Číslo periodika v rámci svazku

Sep

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

—

Kód UT WoS článku

001530260100005

EID výsledku v databázi Scopus

2-s2.0-105009471468