عنوان

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

شماره

LA93p4c480

عنوان اصلي

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

نام عام مواد

[Article]

نام نخستين پديدآور

Acharya, SAdamová, DAdhya, SPAdler, AAdolfsson, JAggarwal, MMAglieri Rinella, GAgnello, MAgrawal, NAhammed, ZAhmad, SAhn, SUAiola, SAkindinov, AAl-Turany, MAlam, SNAlbuquerque, DSDAleksandrov, DAlessandro, BAlfanda, HMAlfaro Molina, RAli, BAli, YAlici, AAlkin, AAlme, JAlt, Tet al.

متن يادداشت

© 2019 The Author(s) 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 (Figure presented.) collisions at s=13 TeV and p-Pb collisions at sNN=5.02 TeV, combined with previously published results from (Figure presented.) 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.

تاريخ نشر

2019

عنوان

Lawrence Berkeley National Laboratory

نام الکترونيکي

نوع ماده

[Article]

کد کاربرگه

278800

سطح دسترسي

a

تكميل شده

Y