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Physics Preliminary Summary: 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 ($|\eta| < 0.8$) as a function of collision centrality in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV using the ALICE...

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Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:http://cds.cern.ch/record/2805493
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collection CERN
description 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 ($|\eta| < 0.8$) as a function of collision centrality in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ 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 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.
id cern-2805493
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
record_format invenio
spelling cern-28054932022-04-05T19:06:09Zhttp://cds.cern.ch/record/2805493engPhysics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron ColliderNuclear Physics - ExperimentThe first measurement of event-by-event antideuteron number fluctuations in high energy heavy-ion collisions is presented. The measurements are carried out at midrapidity ($|\eta| < 0.8$) as a function of collision centrality in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ 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 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.ALICE-PUBLIC-2022-012oai:cds.cern.ch:28054932022
spellingShingle Nuclear Physics - Experiment
Physics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider
title Physics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider
title_full Physics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider
title_fullStr Physics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider
title_full_unstemmed Physics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider
title_short Physics Preliminary Summary: First measurement of antideuteron number fluctuations at energies available at the Large Hadron Collider
title_sort physics preliminary summary: first measurement of antideuteron number fluctuations at energies available at the large hadron collider
topic Nuclear Physics - Experiment
url http://cds.cern.ch/record/2805493