Kaon-proton strong interaction at low relative momentum via femtoscopy in Pb-Pb collisions at the LHC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00547657" target="_blank" >RIV/68378271:_____/21:00547657 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/21:00547657 RIV/68407700:21340/21:00353006

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2021.136708" target="_blank" >https://doi.org/10.1016/j.physletb.2021.136708</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2021.136708" target="_blank" >10.1016/j.physletb.2021.136708</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Kaon-proton strong interaction at low relative momentum via femtoscopy in Pb-Pb collisions at the LHC

Popis výsledku v původním jazyce

n quantum scattering processes between two particles, aspects characterizing the strong and Coulomb forces can be observed in kinematic distributions of the particle pairs. The sensitivity to the interaction potential reaches a maximum at low relative momentum and vanishing distance between the two particles. Ultrarelativistic heavy-ion collisions at the LHC provide an abundant source of many hadron species and can be employed as a measurement method of scattering parameters that is complementary to scattering experiments. This study confirms that momentum correlations of particles produced in Pb-Pb collisions at the LHC provide an accurate measurement of kaon-proton scattering parameters at low relative momentum, allowing precise access to the K- p -> K- p process. This work also validates the femtoscopic measurement in ultrarelativistic heavy-ion collisions as an alternative to scattering experiments and a complementary tool to the study of exotic atoms with comparable precision. In this work, the first femtoscopic measurement of momentum correlations of K- p (K+(p) over bar) and K+p (K-(p) over bar) pairs in Pb-Pb collisions at centre-of-mass energy per nucleon pair of root sNN = 5.02 TeV registered by the ALICE experiment is reported. The components of the K- p complex scattering length are extracted and found to be Rf(0) = -0.91 +/- 0.03(stat)(-0.03)(+0.17) (syst) and Sf(0) = 0.92 +/- 0.05(stat)(-0.33)(+0.12)(syst). The results are compared with chiral effective field theory predictions as well as with existing data from dedicated scattering and exotic kaonic atom experiments.

Název v anglickém jazyce

Kaon-proton strong interaction at low relative momentum via femtoscopy in Pb-Pb collisions at the LHC

Popis výsledku anglicky

n quantum scattering processes between two particles, aspects characterizing the strong and Coulomb forces can be observed in kinematic distributions of the particle pairs. The sensitivity to the interaction potential reaches a maximum at low relative momentum and vanishing distance between the two particles. Ultrarelativistic heavy-ion collisions at the LHC provide an abundant source of many hadron species and can be employed as a measurement method of scattering parameters that is complementary to scattering experiments. This study confirms that momentum correlations of particles produced in Pb-Pb collisions at the LHC provide an accurate measurement of kaon-proton scattering parameters at low relative momentum, allowing precise access to the K- p -> K- p process. This work also validates the femtoscopic measurement in ultrarelativistic heavy-ion collisions as an alternative to scattering experiments and a complementary tool to the study of exotic atoms with comparable precision. In this work, the first femtoscopic measurement of momentum correlations of K- p (K+(p) over bar) and K+p (K-(p) over bar) pairs in Pb-Pb collisions at centre-of-mass energy per nucleon pair of root sNN = 5.02 TeV registered by the ALICE experiment is reported. The components of the K- p complex scattering length are extracted and found to be Rf(0) = -0.91 +/- 0.03(stat)(-0.03)(+0.17) (syst) and Sf(0) = 0.92 +/- 0.05(stat)(-0.33)(+0.12)(syst). The results are compared with chiral effective field theory predictions as well as with existing data from dedicated scattering and exotic kaonic atom experiments.

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

822

Číslo periodika v rámci svazku

NOV 10

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

136708

Kód UT WoS článku

000710431500002

EID výsledku v databázi Scopus

2-s2.0-85116936495