1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/264342</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Accessing The Strong Interaction Between Λ Baryons And Charged Kaons With The Femtoscopy Technique At The Lhc</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2023</publicationYear>
  <dates>
    <date dateType="Issued">2023-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/264342</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.physletb.2023.138145</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;The interaction between Λ baryons and kaons/antikaons is a crucial ingredient for the strangeness $S=0$ and $S=-2$ sector of the meson–baryon interaction at low energies. In particular, the $\Lambda \stackrel{‾}{K}$ might help in understanding the origin of states such as the $\Xi \left(1620\right)$, whose nature and properties are still under debate. Experimental data on $\Lambda \text{–}K$ and $\Lambda \text{–}\stackrel{‾}{K}$ systems are scarce, leading to large uncertainties and tension between the available theoretical predictions constrained by such data. In this Letter we present the measurements of Λ–K${}^{+}\oplus \stackrel{‾}{\Lambda }\text{–}$K$^{−}$ and Λ–K${}^{-}\oplus \stackrel{‾}{\Lambda }\text{–}$K$^{+}$ correlations obtained in the high-multiplicity triggered data sample in pp collisions at $\sqrt{s}=13$ TeV recorded by ALICE at the LHC. The correlation function for both pairs is modeled using the Lednický–Lyuboshits analytical formula and the corresponding scattering parameters are extracted. The Λ–K${}^{-}\oplus \stackrel{‾}{\Lambda }\text{–}$K$^{+}$ correlations show the presence of several structures at relative momenta ${k}^{⁎}$ above 200 MeV/c, compatible with the Ω baryon, the $\Xi \left(1690\right)$, and $\Xi \left(1820\right)$ resonances decaying into Λ–K$^{−}$ pairs. The low ${k}^{⁎}$ region in the Λ–K${}^{-}\oplus \stackrel{‾}{\Lambda }\text{–}$K$^{+}$ also exhibits the presence of the $\Xi \left(1620\right)$ state, expected to strongly couple to the measured pair. The presented data allow to access the ΛK$^{+}$ and ΛK$^{−}$ strong interaction with an unprecedented precision and deliver the first experimental observation of the $\Xi \left(1620\right)$ decaying into ΛK$^{−}$.&lt;/p&gt;</description>
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