Measuring ${K^0_S}^\pm$ interactions using pp collisions at $\sqrt{s}=7$ TeV

S. Acharya , Radosław Bala , M. Bonora , Łukasz Graczykowski , Małgorzata Janik , Adam Kisiel , Mònica Martinez , H. Murakami , Julian Myrcha , Jeremi Niedziela , Janusz Oleniacz , Jan Pluta , J. Rak , Przemysław Rokita , Krystian Rosłon , Tomasz Trzciński , Hanna Zbroszczyk

Abstract

We present the first measurements of femtoscopic correlations between the $K^0_S$ and $K^{\pm}$ particles in pp collisions at $\sqrt{s} = 7$ TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding solely via the $a_0$(980) resonance. The extracted kaon source radius and correlation strength parameters for $K^0_S K^-$ -- are found to be equal within the experimental uncertainties to those for $K^0_S K^+$. Results of the present study are compared with those from identical-kaon femtoscopic studies also performed with pp collisions at $\sqrt{s} = 7$ TeV by ALICE and with a $K^0_S K^{\pm}$ measurement in Pb–Pb collisions at $\sqrt{^{s_{NN}}$ = 2.76 TeV. Combined with the Pb–Pb results, our pp analysis is found to be compatible with the interpretation of the $a_0$ (980) having a tetraquark structure instead of that of a diquark
Collective authorALICE Collaboration
Author S. Acharya - [Variable Energy Cyclotron Centre India]
S. Acharya,,
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, Radosław Bala
Radosław Bala,,
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, M. Bonora - [European Organization for Nuclear Research (CERN)]
M. Bonora,,
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- European Organization for Nuclear Research
, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, Małgorzata Janik (FP / NPD)
Małgorzata Janik,,
- Nuclear Physics Division
, Adam Kisiel (FP / NPD)
Adam Kisiel,,
- Nuclear Physics Division
, Mònica Martinez - [Benemerita Universidad Autonoma de Puebla]
Mònica Martinez,,
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, H. Murakami - [University of Tokyo]
H. Murakami,,
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- University of Tokyo
, Julian Myrcha (FEIT / IN)
Julian Myrcha,,
- The Institute of Computer Science
, Jeremi Niedziela (FP / NPD)
Jeremi Niedziela,,
- Nuclear Physics Division
et al.`
Total number of authors1012
Journal seriesPhysics Letters B, ISSN 0370-2693, (A 35 pkt)
Issue year2019
Vol790
Pages22-34
Publication size in sheets0.6
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1016/j.physletb.2018.12.033
URL https://www.sciencedirect.com/science/article/pii/S0370269318309602?via%3Dihub
Languageen angielski
File
1-s2.0-S0370269318309602-main.pdf 968.1 KB
Score (nominal)35
ScoreMinisterial score = 35.0, 10-07-2019, ArticleFromJournal
Publication indicators WoS Citations = 1; Scopus Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.548; WoS Impact Factor: 2017 = 4.254 (2) - 2017=3.968 (5)
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