Marcel Vos

TL;DR: In this paper, fiducial integrated and differential cross sections for W^+$, $W^-$ and Z boson production are reported based on collision data collected with the ATLAS detector at the CERN Large Hadron Collider.

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 performance of the Silicon Strip Tracker was evaluated during the Sector Test, which consisted of five distinct periods defined by the coolant temperature, and significant emphasis was placed on comparisons between the data and results from Monte Carlo studies.

TL;DR: In this article, the effect of single top production on the study of top quark pair production in future high energy electron-positron colliders is evaluated, and the authors advocate for the exploration of the inclusive $e^+e^-rightarrow W^+bW^-\bar{b}$ process, that includes both top-quark pair and single-top quark production.

TL;DR: In this paper, the authors focus on the extractions by ATLAS and CMS of the top quark pole mass from tt + 1 jet production cross-section, which reached a precision of 1%.