Szczegóły publikacji
Opis bibliograficzny
Study of the $\Lambda-\Lambda$ interaction with femtoscopy correlations in $pp$ and $p–Pb$ collisions at the LHC / S. Acharya, [et al.], P. J. Konopka, [et al.] // Physics Letters. B ; ISSN 0370-2693. — 2019 — vol. 797 art. no. 134822, s. 1–13. — Bibliogr. s. 7–8, Abstr. — Publikacja dostępna online od: 2019-08-01. — P. Konopka – afiliacja: European Organization for Nuclear Research(CERN), Geneva, Switzerland
Autorzy (1022)
- Acharya Shreyasi
- Konopka Piotr
Dane bibliometryczne
| ID BaDAP | 133032 |
|---|---|
| Data dodania do BaDAP | 2021-03-15 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physletb.2019.134822 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physics Letters, B |
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 root s = 13 TeV and p-Pb collisions at root s(NN) = 5.02 TeV, combined with previously published results from pp collisions at root 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)(stat)(-1.0)(+1.8)(syst) MeV.