## Determination of quantum numbers for several excited charmed mesons observed in $B^- \to D^{*+} \pi^- \pi^-$ decays

### Abstract

International audienceA four-body amplitude analysis of the B-→D*+π-π- decay is performed, where fractions and relative phases of the various resonances contributing to the decay are measured. Several quasi-model-independent analyses are performed aimed at searching for the presence of new states and establishing the quantum numbers of previously observed charmed meson resonances. In particular the resonance parameters and quantum numbers are determined for the D1(2420), D1(2430), D0(2550), D1*(2600), D2(2740) and D3*(2750) states. The mixing between the D1(2420) and D1(2430) resonances is studied and the mixing parameters are measured. The dataset corresponds to an integrated luminosity of 4.7  fb-1, collected in proton-proton collisions at center-of-mass energies of 7, 8 and 13 TeV with the LHCb detector

Topics: Particle Physics Experiments, 13000 GeV-cms, 8000 GeV-cms, 7000 GeV-cms, B- --> D*(2010)+ 2pi-, experimental results, CERN LHC Coll, LHC-B, meson resonance, amplitude analysis, mixing, charmed meson: excited state, D*(2010), quantum number, B-: hadronic decay, p p: scattering, p p: colliding beams, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: 'American Physical Society (APS)'
Year: 2020
DOI identifier: 10.1103/PhysRevD.101.032005
OAI identifier: oai:HAL:hal-02392976v1