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Featured researches published by J. Hartert.


Journal of Physics: Conference Series | 2012

The ATLAS Detector Control System

K. Lantzsch; S. Arfaoui; S. Franz; O. Gutzwiller; S. Schlenker; C A Tsarouchas; B. Mindur; J. Hartert; S. Zimmermann; A. A. Talyshev; D. Oliveira Damazio; A. Poblaguev; H. M. Braun; D. Hirschbuehl; S. Kersten; T. A. Martin; P. D. Thompson; D. Caforio; C. Sbarra; D. Hoffmann; S. Nemecek; A. Robichaud-Veronneau; B. M. Wynne; E. Banas; Z. Hajduk; J. Olszowska; E. Stanecka; M. Bindi; A. Polini; M. Deliyergiyev

The ATLAS experiment is one of the multi-purpose experiments at the Large Hadron Collider (LHC) at CERN, constructed to study elementary particle interactions in collisions of high-energy proton beams. Twelve different sub detectors as well as the common experimental infrastructure are controlled and monitored by the Detector Control System (DCS) using a highly distributed system of 140 server machines running the industrial SCADA product PVSS. Higher level control system layers allow for automatic control procedures, efficient error recognition and handling, manage the communication with external systems such as the LHC controls, and provide a synchronization mechanism with the ATLAS data acquisition system. Different databases are used to store the online parameters of the experiment, replicate a subset used for physics reconstruction, and store the configuration parameters of the systems. This contribution describes the computing architecture and software tools to handle this complex and highly interconnected control system.


Physical Review D | 2011

Study of jet shapes in inclusive jet production in pp collisions at {radical}(s)=7 TeV using the ATLAS detector

G. Aad; F. Ahles; M. Beckingham; R. Bernhard; U. Bitenc; R. Bruneliere; Sascha Caron; C. Carpentieri; A. Christov; A. Dahlhoff; J. Dietrich; S. Eckert; M. Fehling-Kaschek; Martin Flechl; J. Glatzer; J. Hartert; M. Heldmann; G. Herten; S. Horner; K. Jakobs

Jet shapes have been measured in inclusive jet production in proton-proton collisions at sqrt(s) = 7 TeV using 3 pb^{-1} of data recorded by the ATLAS experiment at the LHC. Jets are reconstructed using the anti-kt algorithm with transverse momentum 30 GeV < pT < 600 GeV and rapidity in the region |y| < 2.8. The data are corrected for detector effects and compared to several leading-order QCD matrix elements plus parton shower Monte Carlo predictions, including different sets of parameters tuned to model fragmentation processes and underlying event contributions in the final state. The measured jets become narrower with increasing jet transverse momentum and the jet shapes present a moderate jet rapidity dependence. Within QCD, the data test a variety of perturbative and non-perturbative effects. In particular, the data show sensitivity to the details of the parton shower, fragmentation, and underlying event models in the Monte Carlo generators. For an appropriate choice of the parameters used in these models, the data are well described.


Physical Review D | 2011

Measurement of the inclusive isolated prompt photon cross section in pp collisions at {radical}(s)=7 TeV with the ATLAS detector

G. Aad; F. Ahles; M. Beckingham; R. Bernhard; U. Bitenc; R. Bruneliere; Sascha Caron; C. Carpentieri; A. Christov; A. Dahlhoff; J. Dietrich; S. Eckert; M. Fehling-Kaschek; Martin Flechl; J. Glatzer; J. Hartert; M. Heldmann; G. Herten; S. Horner; K. Jakobs

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy root s = 7 TeV is presented. The measurement covers the pseudorapidity ranges vertical bar eta(gamma)vertical bar < 1: 37 and 1: 52 <= vertical bar eta(gamma)vertical bar < 1: 81 in the transverse energy range 15 <= E-T(gamma) < 100 GeV. The results are based on an integrated luminosity of 880 nb(-1), collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. The results are compared to predictions from next-to-leading-order perturbative QCD calculations.A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy √s=7TeV is presented. The measurement covers the pseudorapidity ranges |ηγ|<1. 37 and 1.52≤|ηγ|<1.81 in the transverse energy range 15≤ETγ<100GeV. The results are based on an integrated luminosity of 880nb-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. The results are compared to predictions from next-to-leading-order perturbative QCD calculations.


Physical Review D | 2011

Measurement of the inclusive isolated prompt photon cross section in pp collisions at â(s)=7 TeV with the ATLAS detector

G. Aad; F. Ahles; M. Beckingham; R. Bernhard; U. Bitenc; R. Bruneliere; Sascha Caron; C. Carpentieri; A. Christov; A. Dahlhoff; J. Dietrich; S. Eckert; M. Fehling-Kaschek; Martin Flechl; J. Glatzer; J. Hartert; M. Heldmann; G. Herten; S. Horner; K. Jakobs

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A. Christov

University of Freiburg

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A. Dahlhoff

University of Freiburg

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F. Ahles

University of Freiburg

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G. Herten

University of Freiburg

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K. Jakobs

University of Freiburg

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M. Heldmann

University of Freiburg

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R. Bernhard

University of Freiburg

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