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Measurement of the Hypertriton Properties and Production with ALICE

The hypertriton (3 ΛH) is a bound state of a proton, a neutron, and a Λ baryon. Studying its internal structure is crucial to investigate the hyperon–nucleon (Y –N) strong interaction and offers insights into the inner core of neutron stars, where Λ production is favoured. Measuring precisely the 3...

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Autor principal: Mazzaschi, Francesco
Lenguaje:eng
Publicado: 2023
Materias:
Acceso en línea:https://dx.doi.org/10.5506/APhysPolBSupp.16.1-A149
http://cds.cern.ch/record/2869542
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author Mazzaschi, Francesco
author_facet Mazzaschi, Francesco
author_sort Mazzaschi, Francesco
collection CERN
description The hypertriton (3 ΛH) is a bound state of a proton, a neutron, and a Λ baryon. Studying its internal structure is crucial to investigate the hyperon–nucleon (Y –N) strong interaction and offers insights into the inner core of neutron stars, where Λ production is favoured. Measuring precisely the 3 ΛH lifetime, τ3 ΛH, and Λ separation energy, BΛ, provide a powerful tool for constraining the parameters of the Y –N potential, as τ3 ΛH and BΛ directly reflect the strength of the Y –N interaction. The most precise measurements to date of τ3 ΛH and BΛ are obtained by the ALICE Collaboration, using the data sample of Pb–Pb collisions at a centre-of-mass energy per nucleon pair of √ sNN = 5.02 TeV. These measurements strongly support the loosely-bound nature of 3 ΛH and shed light on the Y –N interaction. Furthermore, the weakly bound nature of the 3 ΛH has important implications on our understanding of the nucleosynthesis mechanism in hadronic collisions. Indeed, the large size of the 3 ΛH wave function determines a large separation between the nuclei production models at low charged-particle multiplicity. For this reason, the first measurement of the production of 3 ΛH in p–Pb collisions at √ sNN = 5.02 TeV performed by ALICE represents an ideal probe for discriminating between the nuclei production mechanisms in high-energy hadron–hadron collisions.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2023
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spelling cern-28695422023-10-04T17:32:56Zdoi:10.5506/APhysPolBSupp.16.1-A149http://cds.cern.ch/record/2869542engMazzaschi, FrancescoMeasurement of the Hypertriton Properties and Production with ALICENuclear Physics - ExperimentParticle Physics - ExperimentThe hypertriton (3 ΛH) is a bound state of a proton, a neutron, and a Λ baryon. Studying its internal structure is crucial to investigate the hyperon–nucleon (Y –N) strong interaction and offers insights into the inner core of neutron stars, where Λ production is favoured. Measuring precisely the 3 ΛH lifetime, τ3 ΛH, and Λ separation energy, BΛ, provide a powerful tool for constraining the parameters of the Y –N potential, as τ3 ΛH and BΛ directly reflect the strength of the Y –N interaction. The most precise measurements to date of τ3 ΛH and BΛ are obtained by the ALICE Collaboration, using the data sample of Pb–Pb collisions at a centre-of-mass energy per nucleon pair of √ sNN = 5.02 TeV. These measurements strongly support the loosely-bound nature of 3 ΛH and shed light on the Y –N interaction. Furthermore, the weakly bound nature of the 3 ΛH has important implications on our understanding of the nucleosynthesis mechanism in hadronic collisions. Indeed, the large size of the 3 ΛH wave function determines a large separation between the nuclei production models at low charged-particle multiplicity. For this reason, the first measurement of the production of 3 ΛH in p–Pb collisions at √ sNN = 5.02 TeV performed by ALICE represents an ideal probe for discriminating between the nuclei production mechanisms in high-energy hadron–hadron collisions.oai:cds.cern.ch:28695422023
spellingShingle Nuclear Physics - Experiment
Particle Physics - Experiment
Mazzaschi, Francesco
Measurement of the Hypertriton Properties and Production with ALICE
title Measurement of the Hypertriton Properties and Production with ALICE
title_full Measurement of the Hypertriton Properties and Production with ALICE
title_fullStr Measurement of the Hypertriton Properties and Production with ALICE
title_full_unstemmed Measurement of the Hypertriton Properties and Production with ALICE
title_short Measurement of the Hypertriton Properties and Production with ALICE
title_sort measurement of the hypertriton properties and production with alice
topic Nuclear Physics - Experiment
Particle Physics - Experiment
url https://dx.doi.org/10.5506/APhysPolBSupp.16.1-A149
http://cds.cern.ch/record/2869542
work_keys_str_mv AT mazzaschifrancesco measurementofthehypertritonpropertiesandproductionwithalice