The Dalitz plot analysis technique is used to study the resonant substructures of B-âD+Ï-Ï- decays in a data sample corresponding to 3.0 fb-1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. A model-independent analysis of the angular moments demonstrates the presence of resonances with spins 1, 2 and 3 at high D+Ï- mass. The data are fitted with an amplitude model composed of a quasi-model-independent function to describe the D+Ï- S wave together with virtual contributions from the Dâ(2007)0 and Bâ0 states, and components corresponding to the D2â(2460)0, D1â(2680)0, D3â(2760)0 and D2â(3000)0 resonances. The masses and widths of these resonances are determined together with the branching fractions for their production in B-âD+Ï-Ï- decays. The D+Ï- S wave has phase motion consistent with that expected due to the presence of the D0â(2400)0 state. These results constitute the first observations of the D3â(2760)0 and D2â(3000)0 resonances, with significances of 10Ï and 6.6Ï, respectively.
Amplitude analysis of B- -> D+ pi- pi- decays
De Serio, M.;Pappagallo, M.;Simone, S.;
2016-01-01
Abstract
The Dalitz plot analysis technique is used to study the resonant substructures of B-âD+Ï-Ï- decays in a data sample corresponding to 3.0 fb-1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. A model-independent analysis of the angular moments demonstrates the presence of resonances with spins 1, 2 and 3 at high D+Ï- mass. The data are fitted with an amplitude model composed of a quasi-model-independent function to describe the D+Ï- S wave together with virtual contributions from the Dâ(2007)0 and Bâ0 states, and components corresponding to the D2â(2460)0, D1â(2680)0, D3â(2760)0 and D2â(3000)0 resonances. The masses and widths of these resonances are determined together with the branching fractions for their production in B-âD+Ï-Ï- decays. The D+Ï- S wave has phase motion consistent with that expected due to the presence of the D0â(2400)0 state. These results constitute the first observations of the D3â(2760)0 and D2â(3000)0 resonances, with significances of 10Ï and 6.6Ï, respectively.File | Dimensione | Formato | |
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PhysRevD.94.072001.pdf
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