Apr 16 – 20, 2018
Kobe University Convention Centre / Kobe International Conference Center
Asia/Tokyo timezone

MC tuning using the HHT PDF set with the low-x higer-twist term.

Apr 17, 2018, 9:40 AM


WG1: Structure Functions and Parton Densities WG1: Structure Functions and Parton Densities


Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE))


In the HHT QCD fit the standard DGLAP evolution was augmented by including an additional low-x higher-twist term in the description of the longitudinal structure function, F$_\rm{L}$. This additional term significantly improves the description of the HERA reduced cross sections at low Bjorken-x and low four-momentum-transfer squared, Q$^2$. Since the HHT fit describes well data from the highest Q$^2$ down to Q$^2$ of a few GeV$^2$, it can be used in studies to tune MC samples using the LHC underlying event variables. Preliminary trsults of this tuning will be shown in this presentation.

Primary authors

Prof. Amanda Cooper-Sarkar (Oxford) Iris Abt (MPI) Brian Foster (University of Oxford (GB)) Dr Volodymyr Myronenko (Deutsches Elektronen-Synchrotron) Paolo Gunnellini (Deutsches Elektronen-Synchrotron (DE)) Matthew Wing (University College London) Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE))

Presentation materials