2026-04-17T02:49:01Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1684782025-12-05T16:59:28Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917
RECERCAT
author
Alfonso Albero, Alejandro
author
Calvo Gómez, Míriam
author
Camboni, Alessandro
author
Coquereau, Samuel
author
Garrido Beltrán, Lluís
author
Gascón Fora, David
author
Gironella Gironell, Pere
author
Graciani Díaz, Ricardo
author
Graugés Pous, Eugeni
author
Vilasis-Cardona, Xavier
author
LHCb Collaboration
author
Marin Benito, Carla
2020-07-13T10:09:28Z2020-07-13T10:09:28Z2019-07-082020-07-13T10:09:29Z
Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X(3842)→D0D¯¯¯¯0 and X(3842) → D+D−. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12 MeV/c2,ΓX(3842)=2.79±0.51±0.35 MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ3 13D3) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ2(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6 MeV/c2,mχ2(3930)=3921.9±0.6±0.2 MeV/c2,Γχ2(3930)=36.6±1.9±0.9 MeV, where the first uncertainty is statistical and the second is systematic.
cc-by (c) Alfonso Albero, Alejandro et al., 2019 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess
Hadrons
Quarks
Col·lisions (Astrofísica)
Hadrons
Quarks
Collisions (Astrophysics)
Near-threshold DD spectroscopy and observation of a new charmonium state
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion