Anna Sfyrla

Abstract: The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) in proton–proton collisions at a centre-of-mass energy of √ s = 7 TeV, using the ATLAS detector at the LHC. The measurements use data corresponding to an integrated luminosity of 34 pb−1. The b-jets are identified using either a lifetime-based method, where secondary decay vertices of b-hadrons in jets are reconstructed using information from the tracking detectors, or a muon-based method where the presence of a muon is used to identify semileptonic decays of b-hadrons inside jets. The inclusive b-jet cross-section is measured as a function of transverse momentum in the range 20 < pT < 400 GeV and rapidity in the range |y| < 2.1. The bb-dijet cross-section is measured as a function of the dijet invariant mass in the range 110 < mjj < 760 GeV, the azimuthal angle difference between the two jets and the angular variable χ in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured crosssections and the predictions obtained using POWHEG + Pythia. MC@NLO + Herwig shows good agreement with the measured bb-dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central b-jets with large transverse momenta.

TL;DR: In this article, the first measurement of two-particle momentum correlations in jets produced in pp collisions at {radical}(s)=1.96 TeV was obtained for charged particles within a restricted cone with an opening angle of 0.5 radians around the jet axis.

TL;DR: In this paper, an unbinned likelihood is constructed based on the dependence of the lepton transverse momentum, P{sub T}, on M{sub top, and a maximum likelihood fit to the data yields a measured mass of 176.7 fb{sup -1} of integrated luminosity at the Fermilab Tevatron using the CDF II detector.

TL;DR: In this article, the authors describe the feasibility of 3D biased diamond sensors that can be operated at very low voltages with full charge collection, and demonstrate the viability of three-dimensional biased sensors for pixel tracking.

TL;DR: A signature-based search for new physics using a dijet plus missing transverse energy (E(T) data sample collected in 2 fb⁻¹ of pp collisions at √s=1.96‬TeV with the CDF II detector at the Fermilab Tevatron is presented.