A1 Journal article (refereed)
First Measurement of Antideuteron Number Fluctuations at Energies Available at the Large Hadron Collider (2023)

ALICE Collaboration. (2023). First Measurement of Antideuteron Number Fluctuations at Energies Available at the Large Hadron Collider. Physical Review Letters, 131, Article 041901. https://doi.org/10.1103/PhysRevLett.131.041901

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Publication year: 2023

Publication date: 25/07/2023

Volume: 131

Article number: 041901

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevLett.131.041901

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/88649

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2204.10166

Abstract

The first measurement of event-by-event antideuteron number fluctuations in high energy heavy-ion collisions is presented. The measurements are carried out at midrapidity (|η|<0.8) as a function of collision centrality in Pb-Pb collisions at √sNN =5.02  TeV using the ALICE detector. A significant negative correlation between the produced antiprotons and antideuterons is observed in all collision centralities. The results are compared with a state-of-the-art coalescence calculation. While it describes the ratio of higher order cumulants of the antideuteron multiplicity distribution, it fails to describe quantitatively the magnitude of the correlation between antiproton and antideuteron production. On the other hand, thermal-statistical model calculations describe all the measured observables within uncertainties only for correlation volumes that are different with respect to those describing proton yields and a similar measurement of net-proton number fluctuations.

Keywords: particle physics

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Related projects

Ministry reporting: Yes

VIRTA submission year: 2023

JUFO rating: 3