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Article
Report number arXiv:2206.03344 ; CERN-EP-2022-110
Title Towards the understanding of the genuine three-body interaction for ppp and ppΛ
Author(s) ALICE Collaboration  Показать всех 1052 авторов
Publication 2023-07-03
Imprint 2022-06-07
Number of pages 22
Note 29 pages, 6 captioned figures, authors from page 24, published version, figures at http://alice-publications.web.cern.ch/node/8231
Published in: Eur. Phys. J. A 59 (2023) 145
DOI 10.1140/epja/s10050-023-00998-6
Subject category Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment ; nucl-ex
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords QCD ; particle correlations and fluctuations ; experimental results
Abstract 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 ppp and ppΛ systems in terms of three-particle correlation functions carried out for pp collisions at 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 ppp system, hinting to the presence of a residual three-body effect while for ppΛ the cumulant is consistent with zero. This measurement demonstrates the accessibility of three-baryon correlations at the LHC.
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Copyright/License Publication: © 2023-2024 CERN (License: CC-BY-4.0)
Preprint: © 2022-2024 CERN (License: CC-BY-4.0)
Submitted by francesco.prino@cern.ch



 


 Запись создана 2022-05-30, последняя модификация 2024-11-27


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