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Josef Hammer

Researcher at CERN

Publications -  637
Citations -  64338

Josef Hammer is an academic researcher from CERN. The author has contributed to research in topics: Large Hadron Collider & Standard Model. The author has an hindex of 120, co-authored 631 publications receiving 60840 citations. Previous affiliations of Josef Hammer include École Polytechnique & Austrian Academy of Sciences.

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Search for a Heavy Bottom-like Quark in $pp$ Collisions at $s = 7$ TeV

S. Chatrchyan, +2145 more
- 04 Jul 2011 - 
TL;DR: In this article, a search for bottom-like quarks in pp collisions at 7 TeV was conducted with the CMS experiment at the LHC and the decay b' to tW was considered in this search.
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Measurement of the underlying event activity in pp collisions at √s = 0.9 and 7 TeV with the novel jet-area/median approach

S. Chatrchyan, +2293 more
- 27 Aug 2012 - 
TL;DR: The first measurement of the charged component of the underlying event using the novel "jet-area/median" approach is presented for proton-proton collisions at centre-of-mass energies of 09 and 7 TeV as mentioned in this paper.
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Measurements of the ZZ production cross sections in the 2l2ν channel in proton–proton collisions at √s = 7 and 8 TeV and combined constraints on triple gauge couplings

Vardan Khachatryan, +2115 more
- 29 Oct 2015 - 
TL;DR: In this article, the authors reconstructed the leptonic decay mode ZZ to 2 l 2 nu from data corresponding to an integrated luminosity of 5.1 (19.6) inverse femtobarns at 7 (8) TeV collected with the CMS experiment.
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Search for dark matter and unparticles in events with a Z boson and missing transverse momentum in proton-proton collisions at √s=13 TeV

Albert M. Sirunyan, +2311 more
- 10 Mar 2017 - 
TL;DR: In this paper, a search for dark matter and unparticle production at the LHC has been performed using events containing two charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum.
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Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at s =8 TeV

Vardan Khachatryan, +2281 more
- 12 Jan 2017 - 
TL;DR: A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at sqrt[s]=8 TeV is performed, with the observed dijet mass spectrum is consistent with the standard model expectation.