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oai:recercat.cat:20.500.14342/31922025-03-11T04:12:30Zcom_2072_482405com_2072_183628col_2072_482415

Precision measurement of D meson mass differences Calvo Gómez, Míriam Camboni, Alessandro Vilasís Cardona, Xavier LHCb Collaboration - CERN Universitat Ramon Llull. La Salle CERN Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) Mesons 539 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\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. 2013-06-17 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.14342/3192 https://doi.org/10.1007/JHEP06(2013)065 eng Journal of High Energy Physics, 2013, Vol. 2013, No.6 (Juny) Attribution 4.0 International © CERN http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 17 p. Springer