Investigating the p-π± and p-p-π± dynamics with femtoscopy 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%3A00388914" target="_blank" >RIV/68407700:21340/25:00388914 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epja/s10050-025-01615-4" target="_blank" >https://doi.org/10.1140/epja/s10050-025-01615-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epja/s10050-025-01615-4" target="_blank" >10.1140/epja/s10050-025-01615-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigating the p-π± and p-p-π± dynamics with femtoscopy in pp collisions at root s=13 TeV

Popis výsledku v původním jazyce

The interaction between pions and nucleons plays a crucial role in hadron physics. It represents a fundamental building block of the low-energy QCD dynamics and is subject to several resonance excitations. This work studies the p-pi(+/-) dynamics using femtoscopic correlations in high-multiplicity pp collisions at root s = 13 TeV measured by ALICE at the LHC. As the final-state interaction between protons and pions is well constrained by scattering experiments and the study of pionic hydrogen, the results give access to information on the particle-emitting source in pp collisions using the femtoscopy methods. The scaling of the source size of primordial protons and pions against their pair transverse mass is extracted. The results are compared with the source sizes studied with p-p, p-K+, and pi(+/-)-pi(+/-) pairs by ALICE in the same collision system and are found to be in agreement for the different particle pairs. This reinforces recent findings by ALICE of a common emission source for all hadron-pairs in pp collisions at LHC energies. Furthermore, the p-p-pi(+/-) systems are studied using three-particle femtoscopy in pp collisions at root s = 13 TeV. The presence of three-body effects is analyzed utilizing the cumulant expansion method. In this formalism, the known two-body interactions are subtracted in order to isolate the three-body effects. For both, p-p-pi(+) and p-p-pi(-), a non-zero cumulant is found, indicating effects beyond pairwise interactions. These results give information on the coupling of the pion to multiple nucleons.

Název v anglickém jazyce

Investigating the p-π± and p-p-π± dynamics with femtoscopy in pp collisions at root s=13 TeV

Popis výsledku anglicky

The interaction between pions and nucleons plays a crucial role in hadron physics. It represents a fundamental building block of the low-energy QCD dynamics and is subject to several resonance excitations. This work studies the p-pi(+/-) dynamics using femtoscopic correlations in high-multiplicity pp collisions at root s = 13 TeV measured by ALICE at the LHC. As the final-state interaction between protons and pions is well constrained by scattering experiments and the study of pionic hydrogen, the results give access to information on the particle-emitting source in pp collisions using the femtoscopy methods. The scaling of the source size of primordial protons and pions against their pair transverse mass is extracted. The results are compared with the source sizes studied with p-p, p-K+, and pi(+/-)-pi(+/-) pairs by ALICE in the same collision system and are found to be in agreement for the different particle pairs. This reinforces recent findings by ALICE of a common emission source for all hadron-pairs in pp collisions at LHC energies. Furthermore, the p-p-pi(+/-) systems are studied using three-particle femtoscopy in pp collisions at root s = 13 TeV. The presence of three-body effects is analyzed utilizing the cumulant expansion method. In this formalism, the known two-body interactions are subtracted in order to isolate the three-body effects. For both, p-p-pi(+) and p-p-pi(-), a non-zero cumulant is found, indicating effects beyond pairwise interactions. These results give information on the coupling of the pion to multiple nucleons.

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 A, Hadrons and Nuclei

ISSN

1434-6001

e-ISSN

1434-601X

Svazek periodika

61

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

31

Strana od-do

—

Kód UT WoS článku

001606176600001

EID výsledku v databázi Scopus

2-s2.0-105016337433