Study of the D[superscript 0][subscript p] Amplitude in Λ[subscript b][superscript 0] → D[superscript 0] Pπ[superscript −] Decays
An amplitude analysis of the decay Λ[subscript b][superscript 0]→ D[superscript 0]pπ[superscript −] is performed in the part of the phase space containing resonances in the D[superscript 0][subscript p] channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb[...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
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Springer Nature
2018
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| Online Access: | http://hdl.handle.net/1721.1/119018 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
| Summary: | An amplitude analysis of the decay Λ[subscript b][superscript 0]→ D[superscript 0]pπ[superscript −] is performed in the part of the phase space containing resonances in the D[superscript 0][subscript p] channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb[superscript −1] of pp collisions recorded by the LHCb experiment. The spectrum of excited Λ[subscript c][superscript +] states that decay into D[superscript 0][subscript p] is studied. The masses, widths and quantum numbers of the Λ[subscript c](2880)[superscript +] and Λ[subscript c](2940)[superscript +] resonances are measured. The constraints on the spin and parity for the Λ[subscript c](2940)[superscript +] state are obtained for the first time. A near-threshold enhancement in the D[superscript 0][subscript p] amplitude is investigated and found to be consistent with a new resonance, denoted the Λ[subscript c](2860)[superscript +], of spin 3/2 and positive parity. Keywords: B physics, Charm physics, Hadron-Hadron scattering (experiments), QCD, Spectroscopy |
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