Constraining the (K)over-barN coupled channel dynamics using femtoscopic correlations at the LHC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00367840" target="_blank" >RIV/68407700:21340/23:00367840 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-023-11476-0" target="_blank" >https://doi.org/10.1140/epjc/s10052-023-11476-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-023-11476-0" target="_blank" >10.1140/epjc/s10052-023-11476-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Constraining the (K)over-barN coupled channel dynamics using femtoscopic correlations at the LHC

Popis výsledku v původním jazyce

The interaction of K(-)with protons is characterised by the presence of several coupled channels, systems like (K) over bar (0)n and pi Sigma with a similar mass and the same quantum numbers as the K(-)p state. The strengths of these couplings to the K(-)p system are of crucial importance for the understanding of the nature of the Lambda(1405) resonance and of the attractive K(-)p strong interaction. In this article, we present measurements of the K(-)p correlation functions in relative momentum space obtained in pp collisions at root s = 13 Te, in p-Pb collisions at root sNN = 5.02 Te, and (semi)peripheral Pb-Pb collisions at root sNN = 5.02 Te. The emitting source size, composed of a core radius anchored to the K(+)p correlation and of a resonance halo specific to each particle pair, varies between 1 and 2 fm in these collision systems. The strength and the effects of the (K) over bar (0)n and pi Sigma inelastic channels on the measured K(-)p correlation function are investigated in the different colliding systems by comparing the data with state-of-the-art models of chiral potentials. A novel approach to determine the conversion weights omega, necessary to quantify the amount of produced inelastic channels in the correlation function, is presented. In this method, particle yields are estimated from thermal model predictions, and their kinematic distribution from blast-wave fits to measured data. The comparison of chiral potentials to the measured K(-)p interaction indicates that, while the pi Sigma-K(-)p dynamics is well reproduced by the model, the coupling to the (K) over bar (0)n channel in the model is currently underestimated.

Název v anglickém jazyce

Constraining the (K)over-barN coupled channel dynamics using femtoscopic correlations at the LHC

Popis výsledku anglicky

The interaction of K(-)with protons is characterised by the presence of several coupled channels, systems like (K) over bar (0)n and pi Sigma with a similar mass and the same quantum numbers as the K(-)p state. The strengths of these couplings to the K(-)p system are of crucial importance for the understanding of the nature of the Lambda(1405) resonance and of the attractive K(-)p strong interaction. In this article, we present measurements of the K(-)p correlation functions in relative momentum space obtained in pp collisions at root s = 13 Te, in p-Pb collisions at root sNN = 5.02 Te, and (semi)peripheral Pb-Pb collisions at root sNN = 5.02 Te. The emitting source size, composed of a core radius anchored to the K(+)p correlation and of a resonance halo specific to each particle pair, varies between 1 and 2 fm in these collision systems. The strength and the effects of the (K) over bar (0)n and pi Sigma inelastic channels on the measured K(-)p correlation function are investigated in the different colliding systems by comparing the data with state-of-the-art models of chiral potentials. A novel approach to determine the conversion weights omega, necessary to quantify the amount of produced inelastic channels in the correlation function, is presented. In this method, particle yields are estimated from thermal model predictions, and their kinematic distribution from blast-wave fits to measured data. The comparison of chiral potentials to the measured K(-)p interaction indicates that, while the pi Sigma-K(-)p dynamics is well reproduced by the model, the coupling to the (K) over bar (0)n channel in the model is currently underestimated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/LM2018104" target="_blank" >LM2018104: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

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

83

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

21

Strana od-do

—

Kód UT WoS článku

001022689000001

EID výsledku v databázi Scopus

2-s2.0-85158052545