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 center-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+ normalization channel is measured to be B(B+ → D*− K+ π+) / B(B+ → D*− π+ π+) = (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.

Observation of the B+ → D∗− K+ π+ Decay

Capriotti, L.;
2017

Abstract

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 center-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+ normalization channel is measured to be B(B+ → D*− K+ π+) / B(B+ → D*− π+ π+) = (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.
2017
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3582740
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