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Accès ouvert déclaré 2025 article

First Measurement of A = 4 Hypernuclei and Antihypernuclei at the LHC

7Citations signalées, ce qui n’est pas une note de qualité
114Institutions déclarées
33Pays d’affiliation déclarés

Rattachement africain : fr, in, ch, kr, sk, de, cn, mx, us, no, ro, cz, gb, br, jp, pl, gr, hu, se, pe, it, at, Afrique du Sud, nl, cu, hr, am, fi, id, th, tr, az, ua. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

In this Letter, the first evidence of the _{Λ[over ¯]}^{4}He[over ¯] antihypernucleus is presented, along with the first measurement at the LHC of the production of (anti)hypernuclei with mass number A=4, specifically (anti)_{Λ}^{4}H and (anti)_{Λ}^{4}He. In addition, the antiparticle-to-particle ratios for both hypernuclei (_{Λ[over ¯]}^{4}H[over ¯]/_{Λ}^{4}H and _{Λ[over ¯]}^{4}He[over ¯]/_{Λ}^{4}He) are shown, which are sensitive to the baryochemical potential of the strongly interacting matter created in heavy-ion collisions. The results are obtained from a data sample of central Pb-Pb collisions, collected during the 2018 LHC data taking at a center-of-mass energy per nucleon pair of sqrt[s_{NN}]=5.02 TeV. The yields measured for the average of the charge-conjugated states are found to be [0.78±0.19(stat)±0.17(syst)]×10^{-6} for the (anti)_{Λ}^{4}H and [1.08±0.34(stat)±0.20(syst)]×10^{-6} for the (anti)_{Λ}^{4}He, and the measured antiparticle-to-particle ratios are in agreement with unity. The presence of (anti)_{Λ}^{4}H and (anti)_{Λ}^{4}He excited states is expected to strongly enhance the production yield of these hypernuclei. The yield values exhibit a combined deviation of 3.3σ from the theoretical ground-state-only expectation, while the inclusion of the excited states in the calculations leads to an agreement within 0.6σ with the present measurements. Additionally, the measured (anti)_{Λ}^{4}H and (anti)_{Λ}^{4}He masses are compatible with the world-average values within the uncertainties.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.

Le contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.

Titre Crossref
First Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>A</mml:mi> <mml:mo>=</mml:mo> <mml:mn>4</mml:mn> </mml:math> Hypernuclei and Antihypernuclei at the LHC
Date Crossref
23/04/2025
Éditeur
American Physical Society (APS)
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.

Les institutions déclarées

Université Clermont AuvergneHomi Bhabha National InstituteEuropean Organization for Nuclear ResearchAligarh Muslim UniversityKorea Institute of Science & Technology InformationUniversity of Pavol Jozef ŠafárikGoethe University FrankfurtCentral China Normal UniversityUniversidad Nacional Autónoma de MéxicoUniversity of HoustonSungkyunkwan UniversityUniversity of BergenTechnical University of MunichBenemérita Universidad Autónoma de PueblaHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicUniversity of DerbyUniversity of MünsterHeidelberg UniversityLawrence Berkeley National LaboratoryNantes UniversitéUniversité Grenoble AlpesHospital Universitário da Universidade de São PauloUniversity of OsloYale UniversityThe University of TokyoGangneung–Wonju National UniversityUniversity of Science and Technology of ChinaIndian Institute of Technology IndoreUniversity of JammuUniversité Paris-SaclayJagiellonian UniversityAGH University of KrakowNational and Kapodistrian University of AthensGauhati UniversityHUN-REN Wigner Research Centre for PhysicsUniversity of LiverpoolLund UniversityIndian Institute of Technology BombayPontificia Universidad Católica del PerúUniversité de StrasbourgUniversidad Autónoma de SinaloaInstitute of Space Science - INFLPR SubsidiaryCzech Technical University in PragueCzech Academy of Sciences, Nuclear Physics InstituteBose InstituteThe University of Texas at AustinUniversity of PaviaOak Ridge National LaboratoryPusan National UniversityUniversity of BresciaIstituto Nazionale di Fisica Nucleare, Sezione di BariPolytechnic University of BariDaresbury LaboratoryStefan Meyer Institute for Subatomic PhysicsUniversity of the WitwatersrandiThemba LaboratoryPolish Academy of SciencesUniversitatea Națională de Știință și Tehnologie Politehnica BucureștiUniversité de LyonWarsaw University of TechnologySaha Institute of Nuclear PhysicsFudan UniversityInha UniversityNational Institute for Subatomic PhysicsUniversity of TsukubaUniversity of BirminghamUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Universidade Federal do ABCNational Institute of Science Education and ResearchUniversity of California SystemUniversity of FoggiaCentro de Aplicaciones Tecnológicas y Desarrollo NuclearUniversity of Cape TownComenius University BratislavaHiroshima UniversitySaga UniversityChicago State UniversityUniversity of KansasUniversidade Federal do Rio Grande do SulUniversity of Tennessee at KnoxvilleNagasaki Institute of Applied ScienceWayne State UniversityUniversity of SplitA. Alikhanyan National LaboratoryUniversidade Estadual de Campinas (UNICAMP)Yonsei UniversityUniversity of JyväskyläUniversity of BonnCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalThe Ohio State UniversityTechnical University of KošiceSouth Great Plain Regional Innovation AgencyNational Research and Innovation AgencyChina Institute of Atomic EnergySuranaree University of TechnologySlovak Academy of SciencesKTO Karatay UniversityUniversity of ZagrebJeonbuk National UniversitySejong UniversityCalifornia Polytechnic State UniversityPanjab UniversityNational Centre for Nuclear ResearchUniversity of South-Eastern NorwayUniversity of MessinaHelsinki Institute of PhysicsChungbuk National UniversityChina University of GeosciencesCreighton UniversityNational Nuclear Research CenterUniversity of TübingenNara Women's UniversityNational Academy of Sciences of Ukraine

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Les sujets associés

High-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studies

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