XXV International Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics and Quantum Chromodynamics"

Probing a core of the interaction potential of two lambda-hyperons with femtoscopic correlations at LEP

21 Sept 2023, 14:50

20m

Blokhintsev auditorium (BLTP)

Parallel: Relativistic heavy ion collisions

Speaker

Lednicky, Richard (JINR Dubna)

Description

The analysis of ALEPH data on femtoscopic correlations of two lambda-hyperons in Z-boson decays yields a very small source radius of 0.11+/-0.03 fm if taking into account only the repulsion due to the Fermi-Dirac quantum statistics. Such a small source radius is counter-intuitive in the string picture of particle production due to a moderate string tension of ~1 GeV/fm. It is shown that the ALEPH data can be desribed with an acceptable source radius of ~0.4 fm if taking into account the repulsive final state interaction between the two lambda-hyperons at distances smaller than a femtometer. Such an information on the two lambda-hyperon potential core is practically inaccessible by other means.

Presentation materials

lednicky_ISHEPP-Dubna_2023f.pdf

Peer reviewing

Paper

Accepted on 12 Dec 2023 by Baldin ISHEPP Seminar

Paper files:

• ishepp-xxv_lednicky 3.zip