We present a study of Higgs interference effects for the ttbar decay mode at NLO QCD in the 1-Higgs-singlet extension of the Standard Model. Results for stable tops are presented. The interference effects have been studied for different benchmark points with heavy Higgs masses in the range 700--3000 GeV. For this purpose a new Monte Carlo framework has been developed. This has made it possible...
Given the absence of clear New Physics signals, Effective Field Theories (EFTs) are being exploited to provide model-independent descriptions of phenomena lying at energies above current direct reach. Interpreting measurements under these extended frameworks often requires complex likelihood fits of multidimensional phase spaces. In this talk we highlight some of the techniques currently being...
We assess the impact of the full luminosity LHC Run II top quark measurements on global PDF and SMEFT analyses as well as on their mutual interplay.
Starting from the widest LHC top quark dataset considered to date, we first assess the constraints it provides on the gluon PDF in the NNPDF4.0 framework and study its consistency with other gluon-sensitive measurements.
We then carry out...
The DGLAP equations describe how parton distribution functions evolve between different energy scales. In this talk, we will discuss how potential effects of New Physics, parametrised in terms of higher dimensional operators in the Standard Model Effective Field Theory, could affect these equations. We assess the importance of the dimensionality of the operators and the role that it plays in...
