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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 supersymmetry in events with a τ lepton pair and missing transverse momentum in proton-proton collisions at √ s = 13 TeV

Albert M. Sirunyan, +2356 more
- 05 Jul 2018 - 
TL;DR: In this paper, a search for the electroweak production of supersymmetric particles in protonproton collisions at a center-of-mass energy of 13TeV is presented in final states with a tau lepton pair.
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Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at s =13 TeV

Albert M. Sirunyan, +2234 more
- 01 Dec 2017 - 
TL;DR: The results are used to place limits on the production of heavy fermions of the type-III seesaw model as a function of the branching ratio to each lepton flavor.
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Measurement of charm and beauty production in deep inelastic ep scattering from decays into muons at HERA

Sergei Chekanov, +312 more
- 01 Jan 2010 - 
TL;DR: In this article, the production of charm and beauty quarks in ep interactions has been measured with the ZEUS detector at HERA for squared four-momentum exchange Q^2>20 GeV^2, using an integrated luminosity of 126 pb^{-1}.
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Search for anomalous single top quark production in association with a photon in pp collisions at √s = 8 TeV

Vardan Khachatryan, +2356 more
- 06 Apr 2016 - 
TL;DR: In this paper, a search for flavor changing neutral currents (FCNC) through single top quark production in association with a photon is presented, and upper limits at the 95% confidence level are set on the tuγ and tcγ anomalous couplings.
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Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at √s=7TeV

S. Chatrchyan, +2212 more
- 12 Nov 2014 - 
TL;DR: In this article, a measurement of differential cross sections for the production of a pair of isolated photons in proton-proton collisions at squarert(s) = 7 TeV is presented.