Precision measurement of the B 0 meson lifetime using  B 0 → J / ψ K ∗ 0 decays with the ATLAS detector

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dc.article.number736
dc.catalogadorgrr
dc.contributor.author Aad, G.
dc.contributor.authorAakvaag, E.
dc.contributor.author Abbott, B.
dc.contributor.authorAbdelhameed, S.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbicht, N. J.
dc.contributor.author Aboelela, M.
dc.contributor.authorAboulhorma, A.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.author Acharya, B. S.
dc.contributor.author Ackermann, A.
dc.contributor.author Adam Bourdarios, C.
dc.contributor.author Adamczyk, L.
dc.contributor.authorAddepalli, S. V.
dc.contributor.author Abidi, S. H.
dc.contributor.authorDiaz,Marco Aurelio
dc.contributor.author Garay Walls, Francisca
dc.contributor.otherUrrejola Pereira, Pedro Salvador
dc.date.accessioned2025-07-07T19:48:37Z
dc.date.available2025-07-07T19:48:37Z
dc.date.issued2025
dc.date.updated2025-07-06T00:05:42Z
dc.description.abstractA measurement of the B 0 meson lifetime using B 0 → J / ψ K ∗ 0 decays in data from 13  TeV proton–proton collisions with an integrated luminosity of 140 fb - 1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is τ = 1.5053 ± 0.0012 ( stat . ) ± 0.0035 ( syst . ) ps . The average decay width extracted from the effective lifetime, using parameters from external sources, is Γ d = 0.6639 ± 0.0005 ( stat . ) ± 0.0016 ( syst . ) ± 0.0038 (ext.) ps - 1 , where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γ s in the B s 0 → J / ψ ϕ decay was used to derive a value for the ratio of the average decay widths Γ d and Γ s for B 0 and B s 0 mesons respectively, of Γ d Γ s = 0.9905 ± 0.0022 (stat.) ± 0.0036 (syst.) ± 0.0057 (ext.) . The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B 0 meson to date.
dc.fechaingreso.objetodigital2025-07-05
dc.format.extent27 páginas
dc.fuente.origenBioMed Central
dc.identifier.doi10.1140/epjc/s10052-025-14232-8
dc.identifier.eissn1434-6052
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-025-14232-8
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/104870
dc.information.autorucInstituto de Física; Garay Walls, Francisca; 0000-0002-6670-1104; 131813
dc.information.autorucInstituto de Física; Urrejola Pereira, Pedro Salvador; 0000-0001-8309-2227; 121214
dc.information.autorucInstituto de Física; Diaz,Marco Aurelio; S/I; 104746
dc.issue.numero7
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaThe European Physical Journal C
dc.rightsacceso abierto
dc.rights.holderCERN for the benefit of the ATLAS Collaboration
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc510
dc.subject.deweyMatemática física y químicaes_ES
dc.titlePrecision measurement of the B 0 meson lifetime using  B 0 → J / ψ K ∗ 0 decays with the ATLAS detector
dc.typeartículo
dc.volumen85
sipa.codpersvinculados104746
sipa.codpersvinculados131813
sipa.codpersvinculados121214
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