Study of the [lambda]-[lambda] interaction with femtoscopy correlations in pp and p-Pb collisions at the LHC
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 s=13...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
1 August 2019
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| In: |
Physics letters
Year: 2019, Jahrgang: 797 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2019.134822 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1016/j.physletb.2019.134822 Verlag: http://www.sciencedirect.com/science/article/pii/S0370269319305362 
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| Verfasserangaben: | ALICE Collaboration* |
MARC
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| 245 | 1 | 0 | |a Study of the [lambda]-[lambda] interaction with femtoscopy correlations in pp and p-Pb collisions at the LHC |c ALICE Collaboration* |
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| 500 | |a Im Titel ist [lambda] als griechischer Buchstabe dargestellt | ||
| 500 | |a Der Name "Yuncu" [Yüncü] ist in der Verfasserangabe falsch geschrieben | ||
| 500 | |a *ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, S. Klewin, M.K. Köhler, L. Leardini, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, M.O. Schmidt, J. Stachel, D.F. Weiser, B. Windelband, A. Yuncu [und 1001 weitere Personen] | ||
| 520 | |a 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 s=13 TeV and p-Pb collisions at sNN=5.02 TeV, combined with previously published results from Image 1 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=3.2−2.4+1.6(stat)−1.0+1.8(syst) MeV. | ||
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