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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

Measurement of the ratio of the 3-jet to 2-jet cross sections in pp collisions at s=7 TeV

S. Chatrchyan, +2158 more
- 26 Aug 2011 - 
TL;DR: A measurement of the ratio of the inclusive 3-jet to 2-jet cross sections as a function of the total jet transverse momentum in the range 0.2 0.5 TeV was proposed in this paper.
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Measurement of the production cross section of a W boson in association with two b jets in pp collisions at s?=8TeV

Vardan Khachatryan, +2245 more
TL;DR: The production cross section of a W boson in association with two b jets is measured using a sample of proton–proton collisions collected by the CMS experiment at the CERN LHC.
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Measurement of the cross section ratio σttbb/σttjj in pp collisions at √s = 8 TEV

Vardan Khachatryan, +2145 more
- 30 Jun 2015 - 
TL;DR: The first measurement of the cross section ratio σ_(ttbb)/σ_(ttjj) was presented using a data sample corresponding to an integrated luminosity of 19.6 fb^(−1) collected in pp collisions at √s = 8TeV with the CMS detector at the LHC as discussed by the authors.
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Studies of beauty suppression via nonprompt D-0 mesons in Pb-Pb collisions at root s(NN)=5.02 TeV

Albert M. Sirunyan, +2315 more
TL;DR: The transverse momentum spectra of D-0 mesons from b hadron decays are measured at midrapidity (vertical bar y vertical bar D0 yield is found to be suppressed in the measured p(T) range from 2 to 100 GeV/c as compared to pp collisions as mentioned in this paper.