Abellan Beteta, CarlosCalvo Gómez, MíriamCamboni, AlessandroComerma Montells, AlbertGarrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasOyanguren Campos, Arantza dePérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPotterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Ruiz Valls, PabloVázquez Gómez, RicardVilasis-Cardona, XavierLHCb Collaboration2014-09-232014-09-232013-061126-6708https://hdl.handle.net/2445/57584Using three- and four-body decays of D mesons produced in semileptonic b-hadron decays, precision measurements of D meson mass differences are made together with a measurement of the D 0 mass. The measurements are based on a dataset corresponding to an integrated luminosity of 1.0 fb−1 collected in pp collisions at 7 TeV. Using the decay D 0 → K + K − K − π +, the D 0 mass is measured to be $ M\left( {{D^0}} \right)={{{1864.75\pm 0.15\left( {\mathrm{stat}} \right)\pm 0.11\left( {\mathrm{syst}} \right)\mathrm{MeV}}} \left/ {{{c^2}}} \right.}. $ The mass differences M(D+)−M(D0)=4.76±0.12(stat)±0.07(syst)MeV/c2,M(Ds)−M(D+)=98.68±0.03(stat)±0.04(syst)MeV/c2 are measured using the D 0 → K + K − π + π − and D+(s)→K+K−π+ modes.17 p.application/pdfengcc by (c) LHCb Collaboration, 2013http://creativecommons.org/licenses/by/3.0/HadronsTeoria quàntica de campsTeoria quànticaRelativitat (Física)GravitacióHadronsQuantum field theoryQuantum theoryRelativity (Physics)Gravitationinfo:eu-repo/semantics/article6289912014-09-23info:eu-repo/semantics/openAccess