Achim Geiser

TL;DR: In this paper, a search for supersymmetry with gauge-mediated supersymmetric breaking in electroweak production was conducted, in which the lightest neutralino has bino-or wino-like components and decays to photons and gravitinos.

TL;DR: This analysis differs from previous searches for new physics in the top quark sector by explicitly separating t W from t t ¯ events and exploiting the specific sensitivity of the t W process to new physics.

TL;DR: In this paper, the authors measured the fiducial and differential production cross sections of the Higgs boson in proton-proton collisions at 13 TeV using events where a Higgs particle decays into a pair of W bosons that subsequently decay into a final state with an electron, a muon, and a couple of neutrinos.

TL;DR: Results on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed in this paper, including a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm- and beauty-quark masses.