First Measurement of Antideuteron Number Fluctuations at Energies Available at the Large Hadron Collider.



Acharya, S, Adamová, D, Adler, A, Aglieri Rinella, G, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I
et al (show 1022 more authors) (2023) First Measurement of Antideuteron Number Fluctuations at Energies Available at the Large Hadron Collider. Physical review letters, 131 (4). 041901-.

Access the full-text of this item by clicking on the Open Access link.

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 sqrt[s_{NN}]=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.

Item Type: Article
Uncontrolled Keywords: ALICE Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Oct 2023 15:50
Last Modified: 02 Oct 2023 15:50
DOI: 10.1103/physrevlett.131.041901
Open Access URL: https://doi.org/10.1103/PhysRevLett.131.041901
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3173333