Title:
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Observation of a New Excited D+s Meson in B0→D−D+K+π− Decays
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Author:
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Calvo Gómez, Míriam; Golobardes, Elisabet; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
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Other authors:
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Universitat Ramon Llull. La Salle; CERN |
Abstract:
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Using pp collision data corresponding to an integrated luminosity of 5.4 fb−1 collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B0→D−D+K+π− decay is studied. A new excited D+s meson is observed decaying into the D+K+π− final state with large statistical significance. The pole mass and width, and the spin parity of the new state are measured with an amplitude analysis to be mR=2591±6±7 MeV, ΓR=89±16±12 MeV, and JP=0−, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as Ds0(2590)+, is a strong candidate to be the Ds(21S0)+ state, the radial excitation of the pseudoscalar ground-state D+s meson. |
Publication date:
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2021-03 |
Subject (UDC):
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539 - Constitució física de la matèria |
Subject(s):
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Gran col·lisionador d'hadrons (França i Suïssa) Interaccions d'hadrons Partícules (Física nuclear) |
Rights:
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L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/
© CERN |
Pages:
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11 p. |
Document type:
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Article Article - Published version |
DOI:
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https://doi.org/10.1103/PhysRevLett.126.122002
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Published by:
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American Physical Society
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Publish at:
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Physical Review Letters, 2021, Vol. 126
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