Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorAlfonso Albero, Alejandro-
dc.contributor.authorCalvo Gómez, Míriam-
dc.contributor.authorCamboni, Alessandro-
dc.contributor.authorCoquereau, Samuel-
dc.contributor.authorGarrido Beltrán, Lluís-
dc.contributor.authorGascón Fora, David-
dc.contributor.authorGironella Gironell, Pere-
dc.contributor.authorGraciani Díaz, Ricardo-
dc.contributor.authorGraugés Pous, Eugeni-
dc.contributor.authorVilasis-Cardona, Xavier-
dc.contributor.authorLHCb Collaboration-
dc.description.abstractWe report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use 2.3 × 10 6 D 0 → K 0 S π + π − decays reconstructed in proton-proton collisions collected by the LHCb experiment in 2011 and 2012. Allowing for C P violation in mixing and in the interference between mixing and decay, we measure the C P -averaged normalized mass difference x C P = [ 2.7 ± 1.6 ( stat ) ± 0.4 ( syst ) ] × 10 − 3 and the C P -violating parameter Δ x = [ − 0.53 ± 0.70 ( stat ) ± 0.22 ( syst ) ] × 10 − 3 . The results are consistent with C P symmetry. These determinations are the most precise from a single experiment and, combined with current world-average results, yield the first evidence that the masses of the neutral charm-meson eigenstates differ.-
dc.format.extent10 p.-
dc.publisherAmerican Physical Society-
dc.relation.isformatofReproducció del document publicat a:
dc.relation.ispartofPhysical Review Letters, 2019, vol. 122, num. 23, p. 231802-
dc.rightscc-by (c) Alfonso et. al. ,2019-
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)-
dc.subject.classificationMesons (Física nuclear)-
dc.subject.otherMesons (Nuclear physics)-
dc.titleMeasurement of the Mass Difference Between Neutral Charm-Meson Eigenstates-
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
694499.pdf1.07 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons