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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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Search for the flavor-changing neutral current interactions of the top quark and the Higgs boson which decays into a pair of b quarks at √s = 13 TeV

Albert M. Sirunyan, +2370 more
- 20 Jun 2018 - 
TL;DR: In this article, a search for flavor-changing neutral currents (FCNC) in events with the top quark and the Higgs boson is presented, and the results show that no significant deviation is observed from the predicted background.
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Search for a singly produced third-generation scalar leptoquark decaying to a τ lepton and a bottom quark in proton-proton collisions at s√=13 TeV

Albert M. Sirunyan, +2359 more
- 09 Jun 2018 - 
TL;DR: In this article, a search for a singly produced third-generation scalar leptoquark decaying to a τ lepton and a bottom quark is presented, and upper limits are set at 95% confidence level on the production cross-section of the third-generative scalars as a function of their mass.
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Neutrino production of opposite sign dimuons in the NOMAD experiment

P. Astier, +162 more
- 27 Jul 2000 - 
TL;DR: The NOMAD Collaboration presented a study of opposite sign dimuon events in the framework of Leading Order QCD in this paper, which yields a value for the charm quark mass of $m_{c} = 1.3 + 0.095+0.17}
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Combination of searches for heavy resonances decaying to WW, WZ, ZZ, WH, and ZH boson pairs in proton–proton collisions at s√=8 and 13 TeV

Albert M. Sirunyan, +2197 more
- 10 Nov 2017 - 
TL;DR: In this article, a statistical combination of searches is presented for massive resonances decaying to WW, WZ, ZZ, WH, and ZH boson pairs in proton-proton collision data collected by the CMS experiment at the LHC.
Journal ArticleDOI

Improved constraints on parton distributions using LHCb, ALICE and HERA heavy-flavour measurements and implications for the predictions for prompt atmospheric-neutrino fluxes

O. Zenaiev, +9 more
- 01 Apr 2020 - 
TL;DR: In this article, the impact of heavy-flavour production in deep inelastic scattering and in pp collisions on parton distribution functions is studied in a QCD analysis at next-to-leading order.