Precision measurement of D meson mass differences

The LHCb Collaboration

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Using 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(D0)=1864. 75± 0.15(stat)± 0.11(syst) MeV/c2. The mass differences M(D+)-M(D0=4.76± 0.12(stat)± MeV/c 2. 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 Ds+ to K+K -π+ modes.

Original languageEnglish
Article number65
Number of pages17
JournalJournal of High Energy Physics
Issue number6
Publication statusPublished - 17 Jun 2013
Externally publishedYes


  • Hadron-Hadron Scattering

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