First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider

  • 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 coalescence calculations, which fail to describe the measurement, in particular if a correlated production of protons and neutrons is assumed. Thermal-statistical model calculations describe the data 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.

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ArXiv Id:
Parent Title (German):arXiv
Series (Serial Number):CERN Report (CERN-EP-2022-040)
Document Type:Preprint
Date of Publication (online):2022/04/21
Date of first Publication:2022/04/21
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Creating Corporation:ALICE (Körperschaft)
Release Date:2023/12/26
Issue:2204.10166 Version 1
Edition:Version 1
Page Number:8
Institutes:Physik / Physik
Informatik und Mathematik / Informatik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0