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Very low $x$ gluon density determined by LHCb exclusive $J/\psi$ data

The low $x$ behaviour of the gluon density $xg(x,\mu^2)$ at scale $\mu^2=2.4$ GeV$^2$ is determined using exclusive $J/\psi$ production data from HERA and LHCb within the framework of collinear factorisation at next-to-leading order (NLO). It is shown that in the interval $3\times 10^{-6} < x <...

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Detalles Bibliográficos
Autores principales: Flett, C.A., Martin, A.D., Ryskin, M.G., Teubner, T.
Lenguaje:eng
Publicado: 2020
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.102.114021
http://cds.cern.ch/record/2723999