The B+ → D∗−K+π+ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. A clear signal is observed, and the ratio of its branching fraction to that of the B+ → D∗−π+π+ normalisation channel is measured to be BB((BB++→→DD∗−∗−Kπ++ππ++)) = (6.39 ± 0.27 ± 0.48) × 10−2, where the first uncertainty is statistical and the second is systematic. This is the first observation of the B+ → D∗−K+π+ decay.
|Original language||English (US)|
|State||Published - Apr 25 2017|
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