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dc.contributor.authorAcharya, Shreyasipt_BR
dc.contributor.authorGay Ducati, Maria Beatrizpt_BR
dc.contributor.authorPereira, Luis Gustavopt_BR
dc.contributor.authorPezzi, Rafael Perettipt_BR
dc.contributor.authorALICE Collaborationpt_BR
dc.date.accessioned2019-11-13T03:50:36Zpt_BR
dc.date.issued2019pt_BR
dc.identifier.issn0370-2693pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/201615pt_BR
dc.description.abstractThis 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 pp collisions at √s=13TeV and p-Pb collisions at √sNN=5.02 TeV, combined with previously published results from pp collisions at √s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0-¹ and the effective range d0, 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 (f0-¹, d0) 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 BΛΛ=3.2+1.6−2.4(stat)+1.8−1.0(syst)MeV.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysics letters. B. Amsterdam. Vol. 797 (Oct. 2019), 134822, p. 1-13pt_BR
dc.rightsOpen Accessen
dc.subjectAceleradores de partículaspt_BR
dc.subjectColisao de ions pesadospt_BR
dc.titleStudy of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHCpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001105136pt_BR
dc.type.originEstrangeiropt_BR


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