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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00642061" target="_blank" >RIV/61389005:_____/25:00642061 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/25:00642061

Result on the web

<a href="https://link.springer.com/article/10.1140/epja/s10050-025-01615-4" target="_blank" >https://link.springer.com/article/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>

Result language

angličtina

Original language name

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

Original language description

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.

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

—

OECD FORD branch

10304 - Nuclear physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

European Physical Journal A

ISSN

1434-6001

e-ISSN

1434-601X

Volume of the periodical

61

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

31

Pages from-to

194

UT code for WoS article

001606176600001

EID of the result in the Scopus database

2-s2.0-105016337433