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Achim Geiser

Researcher at University of Hamburg

Publications -  1474
Citations -  93498

Achim Geiser is an academic researcher from University of Hamburg. The author has contributed to research in topics: Large Hadron Collider & Lepton. The author has an hindex of 129, co-authored 1331 publications receiving 84136 citations. Previous affiliations of Achim Geiser include RWTH Aachen University & Technical University of Dortmund.

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Search for Higgsino pair production in pp collisions at root s=13 TeV in final states with large missing transverse momentum and two Higgs bosons decaying via H -> b(b)over bar

Albert M. Sirunyan, +2214 more
- 01 Feb 2018 - 
TL;DR: In this paper, a search for new physics in 13TeV proton-proton collisions in the final state with large missing transverse momentum and two Higgs bosons decaying via H→bb¯ was conducted.
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Search for t t ¯ H production in the H → b b ¯ decay channel with leptonic t t ¯ decays in proton-proton collisions at √s=13 TeV

Albert M. Sirunyan, +2419 more
- 05 Mar 2019 - 
TL;DR: In this article, a search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair ( $ \mathrm{t}\overline{\mathrm {t}}\mathrm{\H} $ ), in which the Higgs particle decays into a b quark antiquesark pair, in proton-proton collisions at a center-of-mass energy of 13 $ TeV.
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Jet properties in PbPb and pp collisions at √sNN=5.02 TeV

Albert M. Sirunyan, +2364 more
- 28 Feb 2018 - 
TL;DR: In this paper, the properties of jets in PbPb collisions, relative to those in pp collisions, are studied at a nucleon-nucleon center-of-mass energy of 5.02 $ TeV via correlations of charged particles with the jet axis in relative pseudorapidity, relative azimuth, and relative angular distance from the jetaxis.
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Search for gauge-mediated supersymmetry in events with at least one photon and missing transverse momentum in pp collisions at √s=13TeV

Albert M. Sirunyan, +2263 more
- 10 May 2018 - 
TL;DR: In this article, a search for gauge-mediated supersymmetry (SUSY) in final states with photons and large missing transverse momentum is presented, where event selection is optimized for both electroweak (EWK) and strong production SUSY scenarios.
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Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in pp collisions at √s = 8 TeV

Vardan Khachatryan, +2389 more
- 10 Jun 2016 - 
TL;DR: In this article, a search for supersymmetry involving events with at least one photon, one electron or muon, and large missing transverse momentum has been performed by the CMS experiment.