Speaker
Chris Flett
(The University of Jyväskylä)
Description
The exclusive J/psi production process within a `tamed’ collinear factorisation approach to NLO is described, giving a stable and reliable theoretical prediction owing to the resummation of a class of large logarithms and implementation of a crucial low Q_0 subtraction. A comparison with data from HERA and LHCb is made, before an extraction of a low x ~ 3*10^{-6} and low scale mu^2 ~ 2.4 GeV^2 gluon PDF is obtained via profiling of global PDF sets. The significance of this result for low x global gluon PDF fits is quantified.
Primary author
Chris Flett
(The University of Jyväskylä)
Co-authors
Prof.
Thomas Teubner
Prof.
Alan Martin
Prof.
Misha Ryskin
