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Title: Observation of Overlapping Spin-1 and Spin-3 ¯D0K− Resonances at Mass 2.86 GeV/c2
Author: Badalov, Alexey
Calvo Gómez, Míriam
Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 14-Oct-2014
Publisher: American Physical Society
Abstract: The resonant substructure of B 0 s → ¯ D 0 K − π + decays is studied using a data sample corresponding to an integrated luminosity of 3.0     fb − 1 of p p collision data recorded by the LHCb detector. An excess at m ( ¯ D 0 K − ) ≈ 2.86     GeV / c 2 is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the D ∗ s J ( 2860 ) − state previously observed in inclusive e + e − → ¯ D 0 K − X and p p → ¯ D 0 K − X processes consists of at least two particles. This is the first observation of a heavy flavored spin-3 resonance, and the first time that any spin-3 particle has been seen to be produced in B decays. The masses and widths of the new states and of the D ∗ s 2 ( 2573 ) − meson are measured, giving the most precise determinations to date.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2014, vol. 113, num. 16, p. 162001
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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