We have performed an updated global fit to precision electroweak data, W+W? measurements at LEP, and Higgs and diboson data from Runs 1 and 2 of the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) (together with C. Murphy, V. Sanz and T. You). We exhibit the improvement in the constraints on dimension-6 operator coefficients provided by the LHC Run 2 data, and discuss the correlations between them. We also explore the constraints our fit results impose on several models of physics beyond the Standard Model, including models that contribute to the operator coefficients at the tree level and stops in the MSSM that contribute via loops. Finally, I mention pioneering limits on dimension-8 operators obtained from LHC data on isolated photon pairs (together with Shao-Feng Ge).

Fellow of the Royal Society of London Maxwell Medal Winner Paul Dirac Medal Winner
He is a theoretical physicist with research interests in particle physics, astrophysics, cosmology and quantum gravity. The discovery of the gluon by experimental teams at DESY in 1979 was based on an idea the he published in a paper in 1976 and suggested to them. In 1977 he used a grand unified theory to predict the mass of the bottom quark, in 1989 he used precision electroweak data to predict the mass of the top quark, in 1990 he initiated the use of these data to predict the mass of the Higgs boson, and in 1991 he calculated its mass in a supersymmetric theory. He has pioneered phenomenological studies of CP violation and the Higgs boson(1976), grand unified theories (1977 and 1978), supersymmetry and dark matter(1983), string models(1988) and quantum gravity(1997). Many of his recent papers(2011-2013) have been on the interpretation of the LHC Higgs candidate, and one was the first reference in the citation for the award of the 2013 Nobel Prize in Physics by the Swedish Academy. In 1995 he suggested searching for a radioactive isotope signature of nearby supernova explosion, which has subsequently been measured in many experiments between 1999 and 2016.