scispace - formally typeset
A

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
More filters
Journal ArticleDOI

Search for supersymmetry in final states with missing transverse energy and 0, 1, 2, or ≥3 b-quark jets in 7 TeV pp collisions using the variable α T

S. Chatrchyan, +2258 more
- 10 Jan 2013 - 
TL;DR: In this article, a search for supersymmetry in final states with jets and missing transverse energy is performed in pp collisions at a centre-of-mass energy of sqrt(s) = 7 TeV.
Journal ArticleDOI

Search for vectorlike leptons in multilepton final states in proton-proton collisions at √ s = 13 TeV

Albert M. Sirunyan, +2312 more
- 06 Sep 2019 - 
TL;DR: In this article, a search for vector-like leptons in multilepton final states is presented, and the existence of a vectorlike lepton doublet, coupling to the third-generation standard model lepton in the mass range of 120-790 GeV, is excluded at 95% confidence level.
Journal ArticleDOI

Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two b quarks and two τ leptons in proton–proton collisions at s=13TeV

Albert M. Sirunyan, +2298 more
- 10 Oct 2018 - 
TL;DR: In this paper, a search for an exotic decay of the Higgs boson to a pair of light pseudoscalar bosons is performed for the first time in the final state with two b quarks and two τ leptons.
Journal ArticleDOI

Commissioning and performance of the CMS silicon strip tracker with cosmic ray muons

S. Chatrchyan, +2465 more
- 01 Mar 2010 - 
TL;DR: In this paper, the performance of the Silicon Strip Tracker with cosmic ray muons has been investigated in the presence of the 3.8 T magnetic field produced by the superconducting solenoid.

Measurements of differential jet cross sections in proton-proton collisions at √s=7 TeV with the CMS detector

S. Chatrchyan, +2167 more
TL;DR: In this paper, the LHC protonproton collisions at ffiffi s p 1⁄4 7 TeV, corresponding to 5:0 fb 1 of integrated luminosity, have been collected with the CMS detector and measured cross sections are corrected for detector effects and compared to perturbative QCD predictions at next-to-leading order, using five sets of parton distribution functions.