[PDF] Top 20 Measurement of the low mass Drell Yan differential cross section at √s = 7 TeV using the ATLAS detector

... showers using PDFs from the MSTW [17] ...measured cross sections can be well described with modified PDFs, a QCD fit is performed including HERA ep deep inelastic scattering data ... See full document

... A measurement of angular correlations in Drell–Yan lepton pairs via the φ η ∗ observable is ...√ s = 7 TeV are used. The data were collected with the ATLAS detector ... See full document

... The detector is de- scribed in the next section. Section III discusses the event selection, while ...for detector effects is explained in ...measured cross sections are presented ... See full document

... to its respective standard deviation. The relative statistical and uncorrelated systematic uncertainties on µ i k are denoted by δ i stat,k and δ i uncor,k and the variable γ j,k i quantifies the influence of the ... See full document

... inner detector. Electromagnetic clusters are reconstructed using a ‘sliding window’ algorithm that maps the calorimeter cells onto a grid of towers with ∆ η = ...jet cross-section ... See full document

... H. Drevermann 29 , C. Driouichi 35 , M. Dris 9 , J. Dubbert 99 , S. Dube 14 , E. Duchovni 172 , G. Duckeck 98 , A. Dudarev 29 , F. Dudziak 63 , M. Dührssen 29 , I.P. Duerdoth 82 , L. Duflot 115 , M.-A. Dufour 85 , ... See full document

... A. Krasznahorkay 108 , J. Kraus 88 , A. Kreisel 153 , F. Krejci 127 , J. Kretzschmar 73 , N. Krieger 54 , P. Krieger 158 , K. Kroeninger 54 , H. Kroha 99 , J. Kroll 120 , J. Kroseberg 20 , J. Krstic 12a , U. Kruchonak 65 ... See full document

... M.P. Giordani 167a,167c , F.M. Giorgi 22a , P.F. Giraud 138 , P. Giromini 59 , D. Giugni 94a , F. Giuli 122 , C. Giuliani 103 , M. Giulini 60b , B.K. Gjelsten 121 , S. Gkaitatzis 156 , I. Gkialas 9 , E.L. ... See full document

... Figure 7. Measured fiducial cross-sections with the statistical (inner error bar) and statistical plus systematic (outer error bar) uncertainties in the electron, muon, and combined electron and muon ...The ... See full document

... V. Chernyatin 27,* , E. Cheu 7 , L. Chevalier 138 , V. Chiarella 50 , G. Chiarelli 126a,126b , G. Chiodini 76a , A. S. Chisholm 32 , A. Chitan 28b , Y. H. Chiu 172 , M. V. Chizhov 68 , K. Choi 64 , A. R. ... See full document

... inner detector consists of three subsystems: at small radial distance r from the beam axis (50:5 < r < 150 mm), pixel silicon detectors are arranged in three cylindrical layers in the barrel and in three ... See full document

... V. Chernyatin 27,* , E. Cheu 7 , L. Chevalier 138 , V. Chiarella 50 , G. Chiarelli 126a,126b , G. Chiodini 76a , A. S. Chisholm 32 , A. Chitan 28b , Y. H. Chiu 172 , M. V. Chizhov 68 , K. Choi 64 , A. R. ... See full document

... In Monte Carlo, the calorimetric isolation energy, E iso T , needs to be corrected to match that observed in collision data. The correction is optimized on TIGHT photons, for which the background contamination can be ... See full document

... Y. Qin 86 , A. Quadt 56 , W. B. Quayle 164a,164b , M. Queitsch-Maitland 86 , D. Quilty 55 , S. Raddum 120 , V. Radeka 27 , V. Radescu 60b , S. K. Radhakrishnan 149 , P. Radloff 117 , P. Rados 90 , F. Ragusa ... See full document

... polito 133a,133b , A. Irles Quiles 168 , C. Isaksson 167 , M. Ishino 67 , M. Ishitsuka 158 , R. Ishmukhametov 110 , C. Issever 119 , S. Istin 19a , A.V. Ivashin 129 , W. Iwanski 39 , H. Iwasaki 65 , J.M. Izen 41 , ... See full document

... Two alternative methods to estimate the dijet and W + jets background are considered as cross-checks. The first of these is similar to the baseline method but uses fake rates derived from loosely selected electrons ... See full document

... The ATLAS detector [6] has a cylindrical geometry [7] and consists of an inner tracking detector surrounded by a 2 T superconducting solenoid, electromagnetic and had- ronic calorimeters, and ... See full document

... as low as ...lowest mass bin, the predictions underestimate the cross section by about 1–2% (smaller than the luminosity uncertainty), as seen in the lower panel of the figure which shows the ... See full document

... ractive cross-section measurements, including measurements of low-mass di ff raction by the ATLAS and CMS collaborations [33, ... See full document

... C. P. Ward, 28 D. R. Wardrope, 78 A. Washbrook, 46 P. M. Watkins, 18 A. T. Watson, 18 I. J. Watson, 149 M. F. Watson, 18 G. Watts, 137 S. Watts, 84 B. M. Waugh, 78 S. Webb, 83 M. S. Weber, 17 ... See full document