1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

Dublin Core

<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2023-01-01</dc:date>
  <dc:description>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$^{−}$.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/264342</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:264342</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physics Letters B 845 C</dc:source>
  <dc:title>Accessing the strong interaction between Λ baryons and charged kaons with the femtoscopy technique at the LHC</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>