Study of the $\Lambda$-$\Lambda$ interaction with femtoscopy correlations in pp and p-Pb collisions at the LHC

Abstract

This work presents new constraints on the existence and the binding energy of a possible $\Lambda$-$\Lambda$ bound state, the H-dibaryon, derived from $\Lambda$-$\Lambda$ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in pp collisions at $\sqrt{s}=13$ TeV and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV, combined with previously published results from p-Pb collisions at $\sqrt{s}=7$ TeV. The $\Lambda$-$\Lambda$ scattering parameter space, spanned by the inverse scattering length $f_0^{-1}$ and the effective range $d_0$, is constrained by comparing the measured $\Lambda$-$\Lambda$ correlation function with calculations obtained within the Lednicky 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 $\Lambda$-$\Lambda$ interaction. The region in the $(f_0^{-1},d_0)$ plane which would accommodate a $\Lambda$-$\Lambda$ bound state is substantially restricted compared to previous studies. The binding energy of the possible $\Lambda$-$\Lambda$ bound state is estimated within an effective-range expansion approach and is found to be $B_{\Lambda \Lambda }=3.2_{-2.4}^{+1.6}{(\mathrm{stat})}_{-1.0}^{+1.8}(\mathrm{syst})$ MeV.

21 pages, 4 captioned figures, 1 table, authors from page 16, published version, figures at http://alice-publications.web.cern.ch/node/5288

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• Equations of state for supernovae and compact stars
• Performance of the ALICE Experiment at the CERN LHC
• Efimov Physics: a review
• Hyperon-nucleon interactions - a chiral effective field theory approach
• p-p, p-$\Lambda$ and $\Lambda$-$\Lambda$ correlations studied via femtoscopy in pp reactions at $\sqrt{s}$ = 7 TeV
• Most Strange Dibaryon from Lattice QCD
• Lambda-Lambda interaction from relativistic heavy-ion collisions
• A femtoscopic Correlation Analysis Tool using the Schrödinger equation (CATS)
• Systematic Errors: facts and fictions
• $p{\Xi }^{-}$ Correlation in Relativistic Heavy Ion Collisions with Nucleon-Hyperon Interaction from Lattice QCD
• Study of Bose-Einstein correlations in pp, pPb, and PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 0.9-7 TeV
• Search for weakly decaying $\overline{\Lambda \mathrm{n}}$ and $\Lambda \Lambda$ exotic bound states in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Extracting baryon-antibaryon strong interaction potentials from p$\bar{\Lambda }$ femtoscopic correlation function
• $\Lambda \Lambda$ pairing in multi-strange hypernuclei
• Residual correlations between decay products of ${\pi }^0{\pi }^0$ and $p{\Sigma }^0$ systems

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