Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb-1, recorded by the LHCb detector at center-of-mass energies of 7 and 8 TeV, the Bc+âD0K+ decay is observed with a statistical significance of 5.1 standard deviations. By normalizing to B+âD0Ï+ decays, a measurement of the branching fraction multiplied by the production rates for Bc+ relative to B+ mesons in the LHCb acceptance is obtained, RD0K=(fc/fu)ÃB(Bc+âD0K+)=(9.3-2.5+2.8±0.6)Ã10-7, where the first uncertainty is statistical and the second is systematic. This decay is expected to proceed predominantly through weak annihilation and penguin amplitudes, and is the first Bc+ decay of this nature to be observed.
Observation of Bc+ →d0K+ Decays
De Serio, M.;Pappagallo, M.;Simone, S.;
2017-01-01
Abstract
Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb-1, recorded by the LHCb detector at center-of-mass energies of 7 and 8 TeV, the Bc+âD0K+ decay is observed with a statistical significance of 5.1 standard deviations. By normalizing to B+âD0Ï+ decays, a measurement of the branching fraction multiplied by the production rates for Bc+ relative to B+ mesons in the LHCb acceptance is obtained, RD0K=(fc/fu)ÃB(Bc+âD0K+)=(9.3-2.5+2.8±0.6)Ã10-7, where the first uncertainty is statistical and the second is systematic. This decay is expected to proceed predominantly through weak annihilation and penguin amplitudes, and is the first Bc+ decay of this nature to be observed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.