Scattering studies with low-energy kaon-proton femtoscopy in proton-proton collisions at the LHC

S. Acharya , Kamil Deja , Łukasz Graczykowski , Monika Jakubowska , Małgorzata Janik , Adam Kisiel , Julian Myrcha , Piotr Nowakowski , Janusz Oleniacz , Jan Pluta , Przemysław Rokita , Krystian Rosłon , M. O. Schmidt , Tomasz Trzciński , Hanna Zbroszczyk


The study of the strength and behavior of the antikaon-nucleon ( ̄KN) interaction constitutes one of thekey focuses of the strangeness sector in low-energy quantum chromodynamics (QCD). In this Letter aunique high-precision measurement of the strong interaction between kaons and protons, close and abovethe kinematic threshold, is presented. The femtoscopic measurements of the correlation function at lowpair-frame relative momentum of (Kþp⊕K− ̄p) and (K−p⊕Kþ ̄p) pairs measured inppcollisions atffiffiffisp¼5, 7, and 13 TeVare reported. A structure observed around a relative momentum of58MeV=cin themeasured correlation function of (K−p⊕Kþ ̄p) with a significance of4.4σconstitutes the firstexperimental evidence for the opening of theð ̄K0n⊕K0 ̄nÞisospin breaking channel due to the massdifference between charged and neutral kaons. The measured correlation functions have been compared toJülich and Kyoto models in addition to the Coulomb potential. The high-precision data at low relativemomenta presented in this work prove femtoscopy to be a powerful complementary tool to scatteringexperiments and provide new constraints above the ̄KNthreshold for low-energy QCD chiral models
Collective authorThe ALICE Collaboration
Author S. Acharya - [Variable Energy Cyclotron Centre India]
S. Acharya,,
, Kamil Deja (FEIT / ICS)
Kamil Deja,,
- The Institute of Computer Science
, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, Monika Jakubowska (FoEE / ICIE)
Monika Jakubowska,,
- The Institute of Control and Industrial Electronics
, Małgorzata Janik (FP / NPD)
Małgorzata Janik,,
- Nuclear Physics Division
, Adam Kisiel (FP / NPD)
Adam Kisiel,,
- Nuclear Physics Division
, Julian Myrcha (FEIT / IN)
Julian Myrcha,,
- The Institute of Computer Science
, Piotr Nowakowski (FEIT / ICS)
Piotr Nowakowski,,
- The Institute of Computer Science
, Janusz Oleniacz (FP / NPD)
Janusz Oleniacz,,
- Nuclear Physics Division
, Jan Pluta (FP / NPD)
Jan Pluta,,
- Nuclear Physics Division
et al.`
Total number of authors1027
Journal seriesPhysical Review Letters, ISSN 0031-9007, e-ISSN 1079-7114
Issue year2020
Publication size in sheets1.45
Article number092301
Keywords in EnglishQCD ; experimental results ; femtoscopy
ASJC Classification3100 General Physics and Astronomy
Languageen angielski
Score (nominal)200
Score sourcejournalList
ScoreMinisterial score = 200.0, 22-09-2020, ArticleFromJournal
Publication indicators WoS Citations = 1; GS Citations = 9.0; Scopus Citations = 2; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 2.464; WoS Impact Factor: 2018 = 9.227 (2) - 2018=8.313 (5)
Citation count*10 (2020-09-23)
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