Towards the understanding of the genuine three-body interaction for p-p-p and p-p-Λ

0575286 - ÚJF 2024 RIV US eng J - Journal Article
Acharya, S. - Adamová, Dagmar - Adler, A. - Aglieri Rinella, G. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Herman, T. - Horák, D. - Isakov, Artem - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Křížková Gajdošová, K. - Kushpil, Svetlana - Petráček, V. - Šafařík, K. - Torres, S. R. - Závada, Petr … Total 1037 authors
Towards the understanding of the genuine three-body interaction for p-p-p and p-p-Λ.
European Physical Journal A. Roč. 59, č. 7 (2023), č. článku 145. ISSN 1434-6001. E-ISSN 1434-601X
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion experiments
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 2.6, year: 2022
Method of publishing: Open access
https://doi.org/10.1140/epja/s10050-023-00998-6

Three-body nuclear forces play an important role in the structure of nuclei and hypernuclei and are also incorporated in models to describe the dynamics of dense baryonic matter, such as in neutron stars. So far, only indirect measurements anchored to the binding energies of nuclei can be used to constrain the three-nucleon force, and if hyperons are considered, the scarce data on hypernuclei impose only weak constraints on the three-body forces. In this work, we present the first direct measurement of the p-p-p and p-p-Lambda systems in terms of three-particle correlation functions carried out for pp collisions at root s = 13 TeV. Three-particle cumulants are extracted from the correlation functions by applying the Kubo formalism, where the three-particle interaction contribution to these correlations can be isolated after subtracting the known two-body interaction terms. A negative cumulant is found for the p-p-p system, hinting to the presence of a residual three-body effect while for p-p-Lambda the cumulant is consistent with zero. This measurement demonstrates the accessibility of three-baryon correlations at the LHC.
Permanent Link: https://hdl.handle.net/11104/0345057