XXVIII International Workshop on Deep Inelastic Scattering and Related Subjects

The new PDF sets in the MSTW/MMHT framework

24 Mar 2020, 10:00

30m

Brooklyn, NY

Contributed Talk Structure Functions and Parton Densities Structure function and parton densities

Speaker

Prof. Robert Thorne (University College London)

Description

I will give an update on the latest major PDF update with the MSTW/MMHT
framework. The update includes the effects of numerous new data sets, mainly
from the LHC. This includes vector boson production, differential in rapidity,
mass or p_T, or usually some combination. We also include new jet data and
inclusive and differential top pair producation data. There have also been
improvments in the theoretical framework. The parameterisation has been
extended and made more flexible, and more data sets are included without any
approximation at NNLO. The PDFs are largley stable compared to MMHT2014, with
the major changes being in the dteailed breakdown of the quarks and antiquarks
into different flavours. A brief discussion of the dependence on the strong
coupling and quark masses is included.