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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

Study of the dijet mass spectrum in pp → W + jets events at √s=7 TeV

S. Chatrchyan, +2269 more
- 21 Dec 2012 - 
TL;DR: In this article, the invariant mass spectrum of the two jets with highest transverse momentum in pp → W+2-jet and W+3-jet events was investigated to look for resonant enhancement.
Journal ArticleDOI

Measurement of the tt¯bb¯ production cross section in the all-jet final state in pp collisions at √s = 13 TeV

Albert M. Sirunyan, +2321 more
- 10 Apr 2020 - 
TL;DR: A measurement of the production cross section of top quark pairs in association with two b jets is presented in this article, where data collected in proton-proton collisions at s=13TeV by the CMS detector at the LHC corresponding to an integrated luminosity of 35.9

Forward–backward asymmetry of Drell–Yan lepton pairs in pp collisions at √s = 7 TeV

S. Chatrchyan, +2175 more
TL;DR: A measurement of the forward-backward asymmetry (AFBAFB) of Drell-Yan lepton pairs in pp collisions at View the MathML sources=7 TeV is presented in this article.
Journal ArticleDOI

Measurement of the top quark mass in the dileptonic t(t)over-bar decay channel using the mass observables M-bl, M-T2, and M-blv in pp collisions at root=8 TeV

Albert M. Sirunyan, +2227 more
- 22 Aug 2017 - 
TL;DR: In this paper, the authors have received support from the Marie-Curie program and the European Research Council and EPLANET (European Union); the Programa Clarin-COFUND del Principado de Asturias (PCLF); and FEDER (Spain).
Journal ArticleDOI

Measurement of the t̄t production cross section in the all-jet final state in pp collisions at √s=7 TeV

S. Chatrchyan, +2258 more
- 14 May 2013 - 
TL;DR: In this article, a measurement of the tt− production cross section (σtt−) in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks.