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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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Measurement of the cross section for production of b b-bar X, decaying to muons in pp collisions at sqrt(s)=7 TeV

S. Chatrchyan, +2322 more
- 19 Jun 2012 - 
TL;DR: In this paper, a measurement of the inclusive cross section for the process pp to b b-bar X to muon muon X' at 7 TeV is presented, based on a data sample corresponding to an integrated luminosity of 27.9 inverse picobarns collected by the CMS experiment at the LHC.
Journal ArticleDOI

High-ETdijet photoproduction at HERA

Sergei Chekanov, +324 more
- 29 Oct 2007 - 
Journal ArticleDOI

Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at √s=7 TeV

S. Chatrchyan, +2260 more
- 01 Nov 2012 - 
TL;DR: In this article, a search is performed for long-lived neutral particles decaying into a photon and invisible particles using events containing photons, missing transverse energy, and jets, and the impact parameter of the photon relative to the beam-beam collision point can be reconstructed using converted photons.
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Search for a right-handed W boson and a heavy neutrino in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

Armen Tumasyan, +2288 more
- 01 Apr 2022 - 
TL;DR: In this article , the authors presented a search for a right-handed W boson and a heavy neutrino in a final state consisting of two same-flavor leptons (ee or μμ) and two quarks.
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arXiv : Observation of $\mathrm{t\overline{t}}$H production

Albert M. Sirunyan, +2297 more
- 08 Apr 2018 -