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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 Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width

Vardan Khachatryan, +2361 more
- 09 Sep 2016 - 
TL;DR: In this paper, the authors acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: Austria, Belgium, the Netherlands, and the United States National Science Foundation.
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Measurement of the tt¯ production cross section in pp collisions at s=7 TeV with lepton+jets final states

S. Chatrchyan, +2202 more
- 13 Mar 2013 - 
TL;DR: In this article, a measurement of the tt production cross section in pp collisions at √s = 7 TeV is presented, based on data corresponding to an integrated luminosity of 2.3 fb^(−1) collected by the CMS detector at the LHC.
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Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states

S. Chatrchyan, +2247 more
- 04 Nov 2013 - 
TL;DR: In this article, a search for non-standard-model Higgs boson decays to pairs of new light bosons, each of which decays into the μ+μ− final state.
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Dijet Azimuthal Decorrelations in pp Collisions at s=7TeV

Vardan Khachatryan, +2201 more
- 22 Mar 2011 - 
TL;DR: In this paper, measurements of dijet azimuthal decorrelations in pp collisions at 7 TeV using the CMS detector at the CERN LHC are presented, based on an inclusive dijet event sample corresponding to an integrated luminosity of 2.9 inverse picobarns.
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First Measurement of Bose-Einstein Correlations in proton-proton Collisions at s =0.9 and 2.36 TeV at the LHC

Vardan Khachatryan, +2087 more
- 13 Jul 2010 - 
TL;DR: The size of the correlated particle emission region is seen to increase significantly with the particle multiplicity of the event, and the signal is observed in the form of an enhancement of pairs of same-sign charged particles with small relative four-momentum.