1 Ocak 2019 Dergi makalesi Açık Erişim

CERN İşbirliği

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        "name": "CERN \u0130\u015fbirli\u011fi"
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    "description": "<p>This work presents new constraints on the existence and the binding energy of a possible \u039b\u2013\u039b bound state, the H-dibaryon, derived from \u039b\u2013\u039b 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 $p\\text{\u2013}\\mathrm{Pb}$ collisions at $\\sqrt{{s}_{\\mathrm{NN}}}=5.02$ TeV, combined with previously published results from Image 1 collisions at $\\sqrt{s}=7$ TeV. The \u039b\u2013\u039b scattering parameter space, spanned by the inverse scattering length ${f}_{0}^{-1}$ and the effective range ${d}_{0}$, is constrained by comparing the measured \u039b\u2013\u039b correlation function with calculations obtained within the Lednick\u00fd 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 \u039b\u2013\u039b interaction. The region in the $\\left({f}_{0}^{-1},{d}_{0}\\right)$ plane which would accommodate a \u039b\u2013\u039b bound state is substantially restricted compared to previous studies. The binding energy of the possible \u039b\u2013\u039b 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.</p>", 
    "doi": "10.1016/j.physletb.2019.134822", 
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    "journal": {
      "title": "Physics Letters B", 
      "volume": "797 C"
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    "publication_date": "2019-01-01", 
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    "title": "Study of the \u039b\u2013\u039b interaction with femtoscopy correlations in and p\u2013Pb collisions at the LHC"
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