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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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Measurement of the $t \bar{t}$ production cross section in the dilepton channel in pp collisions at $\sqrt{s}$ = 8 TeV

S. Chatrchyan, +2207 more
- 29 Dec 2013 - 
TL;DR: The top-antitop quark (t t-bar) production cross section is measured in proton-proton collisions at 8 TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 inverse femtobarns as discussed by the authors.
Journal ArticleDOI

Search for neutral Higgs bosons decaying to tau pairs in pp collisions at √s = 7 TeV

S. Chatrchyan, +2247 more
TL;DR: In this paper, a search for neutral Higgs bosons decaying to tau pairs at a center-of-mass energy of 7 TeV is performed using a dataset corresponding to an integrated luminosity of 4.6 fb^(−1) recorded by the CMS experiment at the LHC.
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Measurements of differential jet cross sections in proton-proton collisions at √s=7 TeV with the CMS detector

S. Chatrchyan, +2167 more
- 03 Jun 2013 - 
TL;DR: In this article, the LHC proton-proton collisions at √s=7'TeV, corresponding to 5.0'fb-1 of integrated luminosity, have been collected with the CMS detector.
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Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at sNN=2.76TeV

S. Chatrchyan, +2177 more
- 08 Jan 2013 - 
TL;DR: In this article, the first study of isolated photon + jet correlations in relativistic heavy ion collisions is reported using data from PbPb collisions at a centre-of-mass energy of 2.76 TeV2.
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ZEUS next-to-leading-order QCD analysis of data on deep inelastic scattering

Sergei Chekanov, +352 more
- 01 Jan 2003 - 
TL;DR: In this paper, the results of a next-to-leading-order QCD analysis of the ZEUS data on deep inelastic scattering together with fixed-target data were performed, from which the gluon and quark densities of the proton and the value of the strong coupling constant alpha(s)(M-Z) were extracted.