XXVI International Workshop on Deep Inelastic Scattering and Related Subjects

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

17 Apr 2018, 09:40

20m

505

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

Speaker

Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE))

Description

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${}_{\mathrm{L}}$. 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.

Presentation materials

kwichmann-dis18-hhtMCtune.pdf