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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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Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at √s = 7 TeV

Vardan Khachatryan, +2373 more
- 24 Aug 2016 - 
TL;DR: The decorrelation in the azimuthal angle between the most forward and the most backward jets (Mueller-Navelet jets) is measured in data collected in pp collisions with the CMS detector at the LHC at s=7, compared to predictions of various Monte Carlo event generators and to analytical predictions based on the DGLAP and BFKL parton evolution schemes.
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Measurement of the triple-differential cross section for photon + jets production in proton-proton collisions at √s = 7 TeV

S. Chatrchyan, +2282 more
- 03 Jun 2014 - 
TL;DR: In this article, a measurement of the triple-differential cross section of the photon + jets final states using a data sample from proton-proton collisions at 7 TeV is presented.
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Measurement of the WZ production cross section in pp collisions at √s=7 and 8 TeV and search for anomalous triple gauge couplings at √s=8TeV

Vardan Khachatryan, +2247 more
- 12 Apr 2017 - 
TL;DR: The authors of as mentioned in this paper acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); FNRS and======FWO(Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil);MES and CSF (Croatia); MSIP and NRF (Republic of Korea); LAS (Lithuania); BUAP, CINVESTAV, CONACYT, LNS, SEP,
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Measurement of top quark polarisation in t-channel single top quark production

Vardan Khachatryan, +2363 more
- 13 Apr 2016 - 
TL;DR: In this paper, the first measurement of the top quark spin asymmetry sensitive to the top-quark polarisation was presented, based on a sample of pp collisions at a center-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.7 fb−1.
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Measurement of the tt¯ production cross section in the all-jets final state in pp collisions at √s=8 TeV

Vardan Khachatryan, +2286 more
- 08 Mar 2016 - 
TL;DR: In this article, the cross section for ttbar production in the all-jets final state is measured in pp collisions at a centre-of-mass energy of 8 TeV at the LHC with the CMS detector, in data corresponding to an integrated luminosity of 18.4 inverse femtobarns.