Sandor Czellar

TL;DR: In this paper, the authors measured the cross section ratios R l = σ l (e + e − →l + l − ) σ h ( e + e−→l+l−) for l=e, μ and τ using data taken from a scan around the Z0.12.

TL;DR: In this paper, a measurement of the W mass and width has been performed by the DELPHI collaboration using the data collected during 1998 using the method of direct reconstruction of the mass of W from its decay products in both the W+W- -> lvqq and W+w- -> qqqq channels.

TL;DR: SiBT as mentioned in this paper is a beam telescope based on the CMS Tracker data acquisition prototype cards for S-LHC tracking systems, which consists of up to eight reference silicon microstrip modules and slots for a couple of test modules.

Abstract: A model-independent search for the production of heavy resonances decaying into top-antitop quark pairs is presented. The search is based on events containing one lepton (muon or electron) and at least two jets selected from data samples corresponding to an integrated luminosity of 4.4-5.0 fb^(−1) collected in pp collisions at s√=7 TeV. Results are presented from the combination of two dedicated searches optimized for boosted production and production at threshold. No excess of events is observed over the expected yield from the standard model processes. Topcolor Z′ bosons with narrow (wide) width are excluded at 95% confidence level for masses below 1.49 (2.04) TeV and an upper limit of 0.3 (1.3) pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV. Kaluza-Klein excitations of a gluon with masses below 1.82 TeV (at 95% confidence level) in the Randall-Sundrum model are also excluded, and an upper limit of 0.7 pb or lower is set on the production cross section times branching fraction for resonance masses above 1 TeV.

TL;DR: In this paper, a measurement of the Lambda(b)0 lifetime using the decay Lambda (b) 0 to J/Psi Lambda in proton-proton collisions at sqrt(s) = 7 TeV is presented.