[PDF] Top 20 Measurement of the $ZZ$ production cross section and search for anomalous couplings in 2 l2l ' final states in $pp$ collisions at $\sqrt{s}=7$ TeV

... G. Cerminara, T. Christiansen, J.A. Coarasa Perez, D. D’Enterria, A. Dabrowski, A. De Roeck, S. Di Guida, M. Dobson, N. Dupont-Sagorin, A. Elliott-Peisert, B. Frisch, W. Funk, G. Georgiou, M. Giffels, D. Gigi, K. ... See full document

... from the primary vertex, and must satisfy additional quality requirements, as described in ...depositions in the event. A cone of ∆R = p ( ∆η ) 2 + ( ∆φ ) 2 < ... See full document

... applied. The comparison is performed with five different PDF sets. The predictions are in good agreement with the data in general, in both the jet cross- ... See full document

... on the ratio are estimated to be less than 20% (30%) for M T2 < 275 (M T2 > 275) ...uncertainties, the p T dependence of the ratio is studied in data and compared to ... See full document

... b-hadron production cross-section has been predicted with next-to-leading-order (NLO) accuracy for more than twenty years [ 1 , 2 ] and more recently it has been predicted with fixed ... See full document

... than 2 GeV in the barrel and 4 GeV in the ...deposits in a cone of radius R = 0.15 are excluded from the sum, as well as tracks in a cone of ... See full document

... samples of W + c candidates are selected from the events with secondary vertices with three or two tracks, in order to increase the size of the samples available for the ... See full document

... a production cross section some orders of magnitude larger than the W + W − ...[29]. The first is reconstructed using the particle-flow algorithm, while the second ... See full document

... produced at the Large Hadron Collider (LHC) primarily through gluon-gluon ...fusion. The measurements of the tt production cross section and branch- ing ... See full document

... for the trigger effi- ciency and 2–4% for the lepton identification and isolation require- ments, depending on the lepton ...to the use of simulated samples: 1% for ... See full document

... The cross section of t-channel single-top-quark production has been measured in pp collisions using 2011 data in semileptonic top-quark decay modes with ... See full document

... expectation of 57.3 + − 2.3 1.6 pb, calculated in Ref. [2] by using MCFM at NLO with the MSTW08 PDF and setting the factorization and renormalization scales to ... See full document

... A search for new exotic particles decaying to the VZ final state is performed, where V is either a W or a Z boson decaying into two overlapping jets and the Z decays into a pair ... See full document

... those in the predicted background yields, are intro- duced as nuisance parameters in the fit with constraints around the estimated central ...Any cross section or ... See full document

... A. Gaponenko 14 , F. Garberson 177 , M. Garcia-Sciveres 14 , C. Garc´ıa 168 , J.E. Garc´ıa Navarro 168 , R.W. Gardner 30 , N. Garelli 29 , H. Garitaonandia 106 , V. Garonne 29 , J. Garvey 17 , C. Gatti 47 , G. Gaudio ... See full document

... renormalization and factor- ization scales up and down by a factor of 2 for both the inclusive (≥ 0) and exclusive (≥ 1) jet cross sections and adding these two ... See full document

... collections of reconstructed particles are produced using a particle-flow (PF) algorithm [19, ...from the PF particles using the anti-k T jet algorithm [21], im- plemented through F AST J ET ... See full document

... one in which tracks in the silicon tracker are matched to signals in the muon chambers, and another in which a global fit is performed to the track that is seeded ... See full document

... to the predicted distribution from MC simulation. A slight φ dependence in the determi- nation of the signed impact parameter with respect to the beam spot, where φ is the ... See full document

... dilepton final states can be efficiently selected using kinematic requirements on the final state ...backgrounds and verify that the dilep- ton final states are ... See full document