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Register a new userThe miniskirt counter array at CDF-II
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As a part of the CDF Upgrade for Run-II of the Tevatron collider, the azimuthal coverage of the muon detectors between pseudorapidities of 0.6 and 1.2 was completed by the insertion of stacks of drift chambers and scintillation counters, which came to be known as the miniskirts because they cover lower 90^o in azimuth. The design and construction of the miniskirts was rather complex and posed special problems because of its interference with the floor and the supports of the central detector. The original design parameters of the miniskirt scintillator counters for the CDF Muon System are presented and the modifications, testing and installation of these counters in the course of the CDF Upgrade Project are described in detail
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The study of processes containing tau leptons in the final state will play an important role at Tevatron Run II. Such final states will be relevant both for electroweak studies and measurements as well as in searches for physics beyond the Standard Model. The present paper discuss the physics opportunities and challenges related to the implementation of new set of triggers able to select events containing tau candidates in the final state. We illustrate, in particular, the physics capabilities for a variety of new physics scenarios such as supersymmetry (SUSY), SUSY with R-parity violation, with Bilinear parity violation or models with the violation of lepton flavor. Finally, we present the first Run II results obtained using some of the described tau triggers.
We present the latest B physics results from the CDF experiment at the Fermilab Tevatron collider. We focus on a number of analyses, including a measurement of the forward-backward asymmetry of B -> K^(*) mu mu decays, determination of the CP violating phase sin2beta_s in B^0_s-> J/psi phi decays, B -> J/psi X lifetime measurements, observation of resonance structure in Lambda_b -> Lambda_c 3pi, and Upsilon(1S) polarization.
In this paper we review a selection of recent results obtained, in the area of QCD physics, from the CDF-II experiment that studies $pbar{p}$ collisions at $sqrt{s}$=1.96 TeV provided by the Fermilab Tevatron Collider. All results shown correspond to analysis performed using the Tevatron Run II data samples. In particular we will illustrate the progress achieved and the status of our studies on the following QCD processes: jet inclusive production, using different jet clustering algorithm, $W(to e u_e)+ $jets and $Z(to e^+ e^-)+ $jets production, $gamma+b-$jet production, dijet production in double pomeron exchange and finally exclusive $e^+e^-$ and $gamma gamma$ production. No deviations from the Standard Model have been observed so far.
The latest results for the measurement of the CP violating phase beta_s in B0s -> J/psi phi decays, from 5.2 fb-1 integrated luminosity of CDF data are presented. For the first time, this measurement includes the contribution of B0s -> J/psi K+K- or B0s -> J/psi f0 events to the signal sample, where the f0 and non-resonant K+K- are S-wave states. Additional improvements to the analysis include more than doubling the signal sample, improved selection and particle ID, and fully calibrated flavour tagging for the full dataset. Additionally, the worlds most precise single measurements of the B0s lifetime, tau_s, and width difference, DeltaGamma_s are given.
We review three recent results of the CDF collaboration on Bs suppressed decays: the first search for CP--violation in the Bs-->phi phi decay, where two CP--violating asymmetries expected to be zero in the Standard Model are measured, and the observation and the branching ratio measurements of Bs-->jpsi fnot and Bs-->jpsi K(*) decays.
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