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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.

Papers
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Journal ArticleDOI

Performance of reconstruction and identification of τ leptons decaying to hadrons and vτ in pp collisions at √s=13 TeV

Albert M. Sirunyan, +2268 more
- 02 Oct 2018 - 
TL;DR: In this paper, the authors improved the algorithm developed by the CMS Collaboration to reconstruct and identify τ leptons produced in proton-proton collisions at √s=7 and 8 TeV via their decays to hadrons and a neutrino.
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Study of W boson production in PbPb and pp collisions at sNN=2.76 TeV

S. Chatrchyan, +2184 more
TL;DR: In this paper, a measurement of W-boson production in PbPb collisions carried out at a nucleon-nucleon (NN) centre-of-mass energy sqrt(s[NN]) of 2.76 TeV at the LHC using the CMS detector.
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Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state

Albert M. Sirunyan, +2253 more
- 01 Jan 2019 - 
TL;DR: In this paper, on-shell and off-shell Higgs boson production in the four-lepton final state are presented, using data from the CMS experiment at the LHC that correspond to an integrated luminosity of 80.2 fb(-1) at a center-of-mass energy of 13 TeV.
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Search for anomalous production of events with three or more leptons in pp collisions at s =8TeV

S. Chatrchyan, +2214 more
- 20 Aug 2014 - 
TL;DR: In this article, a search for physics beyond the standard model in events with at least three leptons is presented, and limits are placed on new-physics scenarios that yield multilepton final states.
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Search for the standard model Higgs boson decaying to W + W - in the fully leptonic final state in pp collisions at √{ s} = 7 TeV

S. Chatrchyan, +2249 more
TL;DR: A search for the standard model Higgs boson decaying to W+W- in pp collisions at squarert(s) = 7 TeV is reported in this article, where data are collected at the LHC with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns.