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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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Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs

Vardan Khachatryan, +2204 more
- 07 Sep 2014 - 
TL;DR: In this article, the authors presented an analysis on the total width of the recently discovered Higgs boson, Gamma[H], using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to a neutrino pair.
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Search for nu(mu) ---> nu(e) oscillations in the NOMAD experiment

P. Astier, +172 more
- 18 Sep 2003 - 
TL;DR: In this paper, the results of a search for vμ → v e oscillations in the NOMAD experiment at CERN were presented and the 90% confidence limits obtained are Δm2 < 0.4 eV 2 for maximal mixing and sin2(2θ) < 1.4 × 10-3 for large Δm 2.
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The NOMAD experiment at the CERN SPS

J. Altegoer, +157 more
- 11 Feb 1998 - 
TL;DR: The NOMAD experiment as mentioned in this paper is a short base-line search for νμ − ντ oscillations in the CERN neutrino beam, which enables the reconstruction of individual particles produced in the neutrinos interactions.
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Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at √s=8 TeV

Vardan Khachatryan, +2198 more
- 07 Apr 2015 - 
TL;DR: In this article, the authors used a large extra dimensions model and a quark and lepton compositeness model with a left-left isoscalar contact interaction to search for both narrow resonances and broad deviations from standard model predictions.
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Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at √SNN = 2.76 Tev

S. Chatrchyan, +4138 more
- 01 May 2012 - 
TL;DR: In this article, measurements from the CMS experiment at the LHC of dihadron correlations for charged particles produced in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV are presented.