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K. Mueller

Researcher at University of Bonn

Publications -  507
Citations -  46399

K. Mueller is an academic researcher from University of Bonn. The author has contributed to research in topics: Large Hadron Collider & Lepton. The author has an hindex of 104, co-authored 408 publications receiving 44485 citations. Previous affiliations of K. Mueller include Politehnica University of Bucharest & Istanbul Technical University.

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Journal ArticleDOI

Measurements of normalized differential cross sections for tt¯ production in pp collisions at √(s)=7 TeV using the ATLAS detector

Georges Aad, +2857 more
- 13 Oct 2014 - 
Abstract: Measurements of normalized differential cross sections for top-quark pair production are presented as a function of the top-quark transverse momentum, and of the mass, transverse momentum, and rapidity of the t (t) over bar system, in proton proton collisions at a center-of-mass energy of root s = 7 TeV. The data set corresponds to an integrated luminosity of 4.6 fb(-1), recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton jets channel, requiring exactly one lepton and at least four jets with at least one of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector efficiency and resolution effects and are compared to several Monte Carlo simulations and theory calculations. The results are in fair agreement with the predictions in a wide kinematic range. Nevertheless, data distributions are softer than predicted for higher values of the mass of the t (t) over bar system and of the top-quark transverse momentum. The measurements can also discriminate among different sets of parton distribution functions.
Journal ArticleDOI

Evidence for the associated production of a W boson and a top quark in ATLAS at √s = 7 TeV

Georges Aad, +2856 more
- 17 Sep 2012 - 
TL;DR: In this article, the authors presented evidence for the associated production of a W boson and a top quark using 2.05 fb(-1) of pp collision data at root s = 7 TeV accumulated with the ATLAS detector at the LHC.
Journal ArticleDOI

Search for Higgs boson pair production in the [Formula: see text] final state from pp collisions at [Formula: see text] TeVwith the ATLAS detector.

Georges Aad, +2824 more
- 09 Sep 2015 - 
TL;DR: In this paper, the decay products of each Higgs boson are reconstructed as a high-momentum system with either a pair of small-radius jets or a single large-radius jet, the latter exploiting jet substructure techniques and associated b-tagged track-jets.
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Search for long-lived stopped R-hadrons decaying out-of-time with pp collisions using the ATLAS detector

Georges Aad, +2917 more
- 03 Dec 2013 - 
TL;DR: In this paper, an updated search is performed for gluino, top squark, or bottom squark R-hadrons that have come to rest within the ATLAS calorimeter, and decay at some later time to hadronic jets and a neutralino, using 5.0 and 22.9 fb(-1) of pp collisions at 7 and 8 TeV, respectively.
Journal ArticleDOI

Observation of a new χb state in radiative transitions to Y(1S) and Y(2S) at ATLAS

Georges Aad, +3068 more
- 09 Apr 2012 - 
TL;DR: The χb(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider at √s=7 TeV and recorded by the ATLAS detector as mentioned in this paper.