Pion-kaon femtoscopy and the lifetime of the hadronic phase in Pb-Pb collisions at root s(NN)=2.76 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00540938" target="_blank" >RIV/68378271:_____/21:00540938 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/21:00540938 RIV/68407700:21340/21:00351041

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2020.136030" target="_blank" >https://doi.org/10.1016/j.physletb.2020.136030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2020.136030" target="_blank" >10.1016/j.physletb.2020.136030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pion-kaon femtoscopy and the lifetime of the hadronic phase in Pb-Pb collisions at root s(NN)=2.76 TeV

Popis výsledku v původním jazyce

In this paper, the first femtoscopic analysis of pion-kaon correlations at the LHC is reported. The analysis was performed on the Pb-Pb collision data at root(S)(NN) = 2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and is qualitatively reproduced by hydrodynamic models. ALICE data on pion-kaon emission asymmetry are consistent with (3+1)-dimensional viscous hydrodynamics coupled to a statistical hadronisation model, resonance propagation, and decay code THERMINATOR 2 calculation, with an additional time delay between 1 and 2 fm/c for kaons. The delay can be interpreted as evidence for a significant hadronic rescattering phase in heavy-ion collisions at the LHC.

Název v anglickém jazyce

Pion-kaon femtoscopy and the lifetime of the hadronic phase in Pb-Pb collisions at root s(NN)=2.76 TeV

Popis výsledku anglicky

In this paper, the first femtoscopic analysis of pion-kaon correlations at the LHC is reported. The analysis was performed on the Pb-Pb collision data at root(S)(NN) = 2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and is qualitatively reproduced by hydrodynamic models. ALICE data on pion-kaon emission asymmetry are consistent with (3+1)-dimensional viscous hydrodynamics coupled to a statistical hadronisation model, resonance propagation, and decay code THERMINATOR 2 calculation, with an additional time delay between 1 and 2 fm/c for kaons. The delay can be interpreted as evidence for a significant hadronic rescattering phase in heavy-ion collisions at the LHC.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

813

Číslo periodika v rámci svazku

FEB

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

136030

Kód UT WoS článku

000614817100009

EID výsledku v databázi Scopus

2-s2.0-85098075216