Please use this identifier to cite or link to this item:
https://hdl.handle.net/2445/186516
Title: | Evidence for an ηc(1 S) π- resonance in B0→ ηc(1 S) K+π- decays |
Author: | Alfonso Albero, Alejandro Calvo Gomez, M. Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vazquez Gomez, R. LHCb collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | 2018 |
Publisher: | Società Italiana di Fisica & Springer Verlag |
Abstract: | A Dalitz plot analysis of B0 → ηc(1S)K +π− decays is performed using data samples of pp collisions collected with the LHCb detector at centre-of-mass energies of √s = 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 4.7 fb−1. A satisfactory description of the data is obtained when including a contribution representing an exotic ηc(1S)π− resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are 4096 ± 20 +18 −22 MeV and 152±58 +60 −35 MeV, respectively. The spin-parity assignments J P = 0+ and J P = 1− are both consistent with the data. In addition, the first measurement of the B0 → ηc(1S)K +π− branching fraction is performed and gives B(B0→ ηc(1S)K +π−) = (5.73 ± 0.24 ± 0.13 ± 0.66) × 10−4, where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions. |
Note: | Reproducció del document publicat a: https://doi.org/10.1140/epjc/s10052-018-6447-z |
It is part of: | European Physical Journal C, 2018, vol. 78, num. 12, p. 1019 |
URI: | https://hdl.handle.net/2445/186516 |
Related resource: | https://doi.org/10.1140/epjc/s10052-018-6447-z |
ISSN: | 1434-6044 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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