Recent measurements of the Higgs boson properties in the four-lepton channel for 36.1 fb-1 of pp collisions at 13 TeV using the ATLAS detector will be presented. The measurements include the Higgs boson mass as well as inclusive, fiducial, differential and, so-called, simplified template cross sections. Constraints on Higgs boson couplings are derived and interpreted within the Standard Model and various extensions. Direct searches for new physics using four-lepton and di-lepton plus missing transverse momentum final states will also be discussed.

Dr. Xu's research interests mainly focusing on Higgs property and couplings measurements,precision electroweak gauge boson coupling measurements, and searches for new physics in diboson final states. He pursues to understand fundamental issues of the Universe, such as the Electroweak Symmetry breaking and the nature of dark matter. He also works on R&D of High-voltage CMOS pixel sensors, a novel tracking detector technology that can be used for the ATLAS Inner Tracker Phase-II upgrade or future high energy physics experiments.

2006-2010  Undergraduate student at USTC (郭沫若奖)
2010-2015  Joint Ph.D at USTC + U. Michigan (Advisors: Zhengguo Zhao, Bing Zhou)
2014            First recipient of ATLAS Ph.D Grant (the fund was established by former ATLAS
                    Spokespersons Peter Jenni and Fabiola Gianotti (CERN Director General) with their                   
                    Fundamental Physics Prize award money received in 2013)
2015-Now    Postdoctoral fellow at Brookhaven National Laboratory (BNL)