Title: “Higgs physics at FCC”. Speaker: Nicola De Filippis Host: Mingyi Dong Time: July 24, 10:00 Abstract: "The FCC-ee offers powerful opportunities to determine the Higgs boson parameters, exploiting over 10^6 e+e−→ZH events and almost 10^5 WW→H events at centre-of-mass energies around 240 and 365 GeV. This essay spotlights the important measurements of the ZH production cross section and of the Higgs boson mass. The measurement of the total ZH cross section is an essential input to the absolute determination of the HZZ coupling -- a "standard candle" that can be used by all other measurements, including those made at hadron colliders. The determination of the Higgs boson mass with a precision significantly better than the Higgs boson width (4.1 MeV in the Standard Model) is a prerequisite to either constrain or measure the electron Yukawa coupling via direct e+e−→H production at √s=125 GeV. Approaching the statistical limit of 0.1% and O(1) MeV on the ZH cross section and the Higgs boson mass, respectively, sets highly demanding requirements on accelerator operation, detector design, theoretical calculations, and analysis techniques. The latest results included in the Feasibility Study recently finalized for the European Strategy Symposium will be presented." About the speaker: "Prof. N. De Filippis made a fundamental contribution to the discovery of the 125GeV boson and measurement of its properties with the CMS experiment at the LHC by developing an analysis to look for a Higgs boson decaying into two gauge Z bosons and then into charged leptons. Along the path of shading light on the reality of the Higgs mechanism, he worked on constraints on Higgs self-couplings via the non-resonant double Higgs production (for several final states), and on the search for BSM physics via the resonant double Higgs production at the LHC. Prof. De Filippis leads currently also the effort for the project of a drift chamber as the main tracking device for the IDEA detector proposal at FCC-ee. He is also involved in inspecting the performance of machine learning tools to improve the signal to background performance for physics analyses, by using high performance computing. Starting from From 2018 he has been Associate Professor at the Physics Department of “Politecnico di Bari” and Visiting Courtesy Professor at Florida State University, Tallahassee, US. He was CMS LPC Distinguished Researcher at the LHC Physics Centre (LPC) Fermilab, Batavia, US in 2018 and 2019. In 2011 he was Associate fellow grant by INFN and CERN to work at CERN. He was researcher with a "contrat a duree determinee" financed by the CNRS at “Laboratoire Leprince-Ringuet”, “Ecole Polytechnique” (Palaiseau, France) between 2007 and 2009."