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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributorCERN
dc.contributor.authorLHCb Collaboration - CERN
dc.contributor.authorCalvo Gómez, Míriam
dc.contributor.authorCamboni, Alessandro
dc.contributor.authorGolobardes, Elisabet
dc.contributor.authorValls Canudas, Núria
dc.contributor.authorVilasís Cardona, Xavier
dc.date.accessioned2021-07-20T18:01:36Z
dc.date.accessioned2023-10-02T06:50:34Z
dc.date.available2021-07-20T18:01:36Z
dc.date.available2023-10-02T06:50:34Z
dc.date.issued2021-06
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3507
dc.description.abstractSearches for CP violation in the two-body decays D+(s)→h+π0 and D+(s)→h+η (where h+ denotes a π+ or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb−1 or 6 fb−1 of integrated luminosity. The π0 and η mesons are reconstructed using the e+e−γ final state, which can proceed as three-body decays π0 → e+e−γ and η → e+e−γ, or via the two-body decays π0 → γγ and η → γγ followed by a photon conversion. The measurements are made relative to the control modes D+(s)→K0Sh+ to cancel the production and detection asymmetries. The CP asymmetries are measured to be ACP(D+→π+π0)=(−1.3±0.9±0.6)%,ACP(D+→K+π0)=(−3.2±4.7±2.1)%,ACP(D+→π+η)=(−0.2±0.8±0.4)%,ACP(D+→K+η)=(−6±10±4)%,ACP(D+s→K+π0)=(−0.8±3.9±1.2)%,ACP(D+s→π+η)=(0.8±0.7±0.5)%,ACP(D+s→K+η)=(0.9±3.7±1.1)%, where the first uncertainties are statistical and the second systematic. These results are consistent with no CP violation and mostly constitute the most precise measurements of ACP in these decay modes to date.eng
dc.format.extent25 p.cat
dc.language.isoengcat
dc.publisherSpringercat
dc.relation.ispartofJournal of High Energy Physics, 2021, Vol.6, No. 19cat
dc.rightsAttribution 4.0 International
dc.rights© CERN
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherGran col·lisionador d'hadrons (França i Suïssa)cat
dc.subject.otherInteraccions d'hadronscat
dc.subject.otherPartícules (Física nuclear)cat
dc.titleSearch for CP violation in D+(s)→h+π0 and D+(s)→h+η decayscat
dc.typeinfo:eu-repo/semantics/articlecat
dc.typeinfo:eu-repo/semantics/publishedVersioncat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc539
dc.identifier.doihttps://doi.org/10.1007/JHEP06(2021)019cat


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Attribution 4.0 International
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