Speaker
Dr
Marco Guzzi
(Desy Hamburg)
Description
The rate of the ttbar production at the LHC is large enough to make
thorough measurements of the differential cross section in terms
of the relevant kinematic final-state variables, i.e. transverse momentum $P_T$, rapidity $y$, invariant mass, etc..
The theoretical analysis of such differential distributions requires
knowledge of QCD corrections beyond the NLO as well as higher-order
soft-gluon contributions from threshold resummation. We illustrate a comparison of recent data to a NLO/NNLO-approx + NNLL calculation
that benefits from recent improvements and explicit expressions from SCET and we also discuss differences between various approaches already present in the literature. Our main goal is to assemble all the elements into a computer code that can be used to compute ttbar differential cross section for phenomenological applications and comparisons with the forthcoming data. Particularly relevant is the inclusion of this code in HERAFITTER, for the determination of PDFs and for a PDFs understanding of top quark production.
Author
Dr
Marco Guzzi
(Desy Hamburg)
Co-authors
Dr
Katerina Lipka
(Desy Hamburg)
Prof.
Sven-Olaf Moch
(Hamburg University - Desy Hamburg)
