Measurements of differential two-particle number and transverse momentum correlation functions 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%3A00388915" target="_blank" >RIV/68407700:21340/25:00388915 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-025-14531-0" target="_blank" >https://doi.org/10.1140/epjc/s10052-025-14531-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-025-14531-0" target="_blank" >10.1140/epjc/s10052-025-14531-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of differential two-particle number and transverse momentum correlation functions in pp collisions at root s=13 TeV

Popis výsledku v původním jazyce

Differential two-particle normalized cumulants (R-2) and transverse momentum correlations (P-2) are measured as a function of the relative pseudorapidity and azimuthal angle difference (Delta eta, Delta phi) of charged particle pairs in minimum bias pp collisions at root s = 13 TeV. The measurements use charged hadrons in the pseudorapidity region of vertical bar eta vertical bar < 0.8 and the transverse momentum range 0.2 < p(T) < 2.0 GeV/c in order to focus on soft multiparticle interactions and to complement prior measurements of these correlation functions in p-Pb and Pb-Pb collisions. The correlation functions are reported for both unlike-sign and like-sign pairs and their charge-independent and charge-dependent combinations. Both the R-2 and P-2 measured in pp collisions exhibit features qualitatively similar to those observed in p-Pb and Pb-Pb collisions. The Delta eta and Delta phi root mean square widths of the near-side peak of the correlation functions are evaluated and compared with those observed in p-Pb and Pb-Pb collisions and show smooth evolution with the multiplicity of charged particles produced in the collision. The comparison of the measured correlation functions with predictions from PYTHIA8 shows that this model qualitatively captures their basic structure and characteristics but feature important differences. In addition, the R-2(CD) is used to determine the charge balance function of hadrons produced within the detector acceptance of the measurements. The integral of the balance function is found to be compatible with those reported by a previous measurement in Pb-Pb collisions.

Název v anglickém jazyce

Measurements of differential two-particle number and transverse momentum correlation functions in pp collisions at root s=13 TeV

Popis výsledku anglicky

Differential two-particle normalized cumulants (R-2) and transverse momentum correlations (P-2) are measured as a function of the relative pseudorapidity and azimuthal angle difference (Delta eta, Delta phi) of charged particle pairs in minimum bias pp collisions at root s = 13 TeV. The measurements use charged hadrons in the pseudorapidity region of vertical bar eta vertical bar < 0.8 and the transverse momentum range 0.2 < p(T) < 2.0 GeV/c in order to focus on soft multiparticle interactions and to complement prior measurements of these correlation functions in p-Pb and Pb-Pb collisions. The correlation functions are reported for both unlike-sign and like-sign pairs and their charge-independent and charge-dependent combinations. Both the R-2 and P-2 measured in pp collisions exhibit features qualitatively similar to those observed in p-Pb and Pb-Pb collisions. The Delta eta and Delta phi root mean square widths of the near-side peak of the correlation functions are evaluated and compared with those observed in p-Pb and Pb-Pb collisions and show smooth evolution with the multiplicity of charged particles produced in the collision. The comparison of the measured correlation functions with predictions from PYTHIA8 shows that this model qualitatively captures their basic structure and characteristics but feature important differences. In addition, the R-2(CD) is used to determine the charge balance function of hadrons produced within the detector acceptance of the measurements. The integral of the balance function is found to be compatible with those reported by a previous measurement in Pb-Pb collisions.

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

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

85

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

24

Strana od-do

—

Kód UT WoS článku

001606174200001

EID výsledku v databázi Scopus

2-s2.0-105016394724