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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...
Lenguaje: | eng |
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Publicado: |
2022
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2805493 |
_version_ | 1780972931760783360 |
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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 |