1 Ocak 2019 Dergi makalesi Açık Erişim

CERN İşbirliği

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<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>2019-01-01</dc:date>
  <dc:description>This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in Image 1 collisions at $\sqrt{s}=13$ TeV and $p\text{–}\mathrm{Pb}$ collisions at $\sqrt{{s}_{\mathrm{NN}}}=5.02$ TeV, combined with previously published results from Image 1 collisions at $\sqrt{s}=7$ TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length ${f}_{0}^{-1}$ and the effective range ${d}_{0}$, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the $\left({f}_{0}^{-1},{d}_{0}\right)$ plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be ${B}_{\Lambda \Lambda }={3.2}_{-2.4}^{+1.6}{\text{(stat)}}_{-1.0}^{+1.8}\text{(syst)}$ MeV.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/105801</dc:identifier>
  <dc:identifier>oai:zenodo.org:105801</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 797 C</dc:source>
  <dc:title>Study of the Λ–Λ interaction with femtoscopy correlations in and p–Pb collisions at the LHC</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>