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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 B0 production cross section in pp collisions at sqrt[s] = 7 TeV.

S. Chatrchyan, +2215 more
- 20 Jun 2011 - 
TL;DR: In this paper, the authors measured the differential production cross sections in transverse momentum and rapidity for B0 mesons produced in pp collisions at square root(s) = 7 TeV.
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Limits on the Higgs boson lifetime and width from its decay to four charged leptons

Vardan Khachatryan, +2299 more
- 22 Oct 2015 - 
TL;DR: In this paper, the lifetime and width of the Higgs boson were obtained from H to ZZ to 4 lepton events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7 inverse femtobarns at a center-of-mass energy of 7 and 8 TeV, respectively.
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Measurement of pseudorapidity distributions of charged particles in proton-proton collisions at $\sqrt{s}$ = 8 TeV by the CMS and TOTEM experiments

S. Chatrchyan, +2272 more
- 29 Oct 2014 - 
TL;DR: Pseudorapidity (eta) distributions of charged particles produced in proton-proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges abs(eta) < 2.2 and 5.3 < abs(ta) < 6.4 covered by the CMS and TOTEM detectors, respectively as mentioned in this paper.
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Search for heavy Higgs bosons decaying to a top quark pair in proton-proton collisions at √s= 13 TeV

Albert M. Sirunyan, +2402 more
- 27 Apr 2020 - 
TL;DR: In this article, a search for additional scalar (H) or pseudoscalar (A) Higgs bosons decaying to a top quark pair in proton-proton collisions at a center-of-mass energy of 13 TeV is presented.
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Searches for third-generation squark production in fully hadronic final states in proton-proton collisions at √s= 8 TeV

Vardan Khachatryan, +2332 more
- 17 Jun 2015 - 
TL;DR: In this article, three mutually exclusive searches for third-generation squarks in fully hadronic final states are presented using data samples corresponding to integrated luminosities of 19.4 or 19.7 fb^(−1), collected at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC.