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.| File | Dimensione | Formato | |
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2017-AR-41-Observation_of_the_Bp_to_Dstarm_Kp_pip_Decay-PRD.pdf
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