Multiplicity dependence of Ξc+ and Ξc0 production in pp collisions at root s=13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00388125" target="_blank" >RIV/68407700:21340/25:00388125 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP12(2025)038" target="_blank" >https://doi.org/10.1007/JHEP12(2025)038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP12(2025)038" target="_blank" >10.1007/JHEP12(2025)038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multiplicity dependence of Ξc+ and Ξc0 production in pp collisions at root s=13 TeV

Popis výsledku v původním jazyce

The first measurement at midrapidity (vertical bar y vertical bar < 0.5) of the production yield of the strange-charm baryons Xi(+)(c) and Xi(0)(c) as a function of transverse momentum (p(T)) in different charged-particle multiplicity classes in proton-proton collisions at root s = 13TeV with the ALICE experiment at the LHC is reported. The Xi(+)(c) baryon is reconstructed via the Xi(+)(c) -> Xi(-) pi(+)pi(+) decay channel in the range 4 < p(T) < 12 GeV/c, while the Xi(0)(c) baryon is reconstructed via both the Xi(0)(c) -> Xi(-) pi(+) and Xi(0)(c) -> Xi(-) e(+) nu(e) decay channels in the range 2 < p(T) < 12 GeV/c. The baryon-to-meson ( Xi(0,+)(c) /D-0) and the baryon-to-baryon (Xi(0,+)(c) /Lambda(+)(c)) production yield ratios show no significant dependence on multiplicity. In addition, the observed yield ratios are not described by theoretical predictions that model charm-quark fragmentation based on measurements at e(+)e(-) and e(-)p colliders, indicating differences in the charm-baryon production mechanism in pp collisions. A comparison with different event generators and tunings, including different modelling of the hadronisation process, is also discussed. Moreover, the branching-fraction ratio of BR( Xi(0)(c) -> Xi(-) e(+) nu(e))/BR( Xi(0)(c) -> Xi(-) pi(+)) is measured as 0.825 +/- 0.094 (stat.) +/- 0.081 (syst.). This value supersedes the previous ALICE measurement, improving the statistical precision by a factor of 1.6.

Název v anglickém jazyce

Multiplicity dependence of Ξc+ and Ξc0 production in pp collisions at root s=13 TeV

Popis výsledku anglicky

The first measurement at midrapidity (vertical bar y vertical bar < 0.5) of the production yield of the strange-charm baryons Xi(+)(c) and Xi(0)(c) as a function of transverse momentum (p(T)) in different charged-particle multiplicity classes in proton-proton collisions at root s = 13TeV with the ALICE experiment at the LHC is reported. The Xi(+)(c) baryon is reconstructed via the Xi(+)(c) -> Xi(-) pi(+)pi(+) decay channel in the range 4 < p(T) < 12 GeV/c, while the Xi(0)(c) baryon is reconstructed via both the Xi(0)(c) -> Xi(-) pi(+) and Xi(0)(c) -> Xi(-) e(+) nu(e) decay channels in the range 2 < p(T) < 12 GeV/c. The baryon-to-meson ( Xi(0,+)(c) /D-0) and the baryon-to-baryon (Xi(0,+)(c) /Lambda(+)(c)) production yield ratios show no significant dependence on multiplicity. In addition, the observed yield ratios are not described by theoretical predictions that model charm-quark fragmentation based on measurements at e(+)e(-) and e(-)p colliders, indicating differences in the charm-baryon production mechanism in pp collisions. A comparison with different event generators and tunings, including different modelling of the hadronisation process, is also discussed. Moreover, the branching-fraction ratio of BR( Xi(0)(c) -> Xi(-) e(+) nu(e))/BR( Xi(0)(c) -> Xi(-) pi(+)) is measured as 0.825 +/- 0.094 (stat.) +/- 0.081 (syst.). This value supersedes the previous ALICE measurement, improving the statistical precision by a factor of 1.6.

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)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2025

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

31

Strana od-do

—

Kód UT WoS článku

001641203800001

EID výsledku v databázi Scopus

2-s2.0-105026572878