Observation of $B_c^+ \rightarrow D^0 K^+$ decaysстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 мая 2017 г.
Аннотация:Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV, the B+c→D0K+ decay is observed with a statistical significance of 5.1 standard deviations. By normalising to B+→D¯0π+ decays, a measurement of the branching fraction multiplied by the production rates for B+c relative to B+ mesons in the LHCb acceptance is obtained,
RD0K=fcfu×B(B+c→D0K+)=(9.3+2.8−2.5±0.6)×10−7,
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 B+c
decay of this nature to be observed.