Carmen Schiavi

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The recent measurements of the B0 s meson mixing amplitude by CDF and of the leptonic branching fraction BR(B → τντ ) by Belle call for an upgraded analysis of the Unitarity Triangle in the Standard Model. Besides improving the previous constraints on the parameters of the CKM matrix, these new measurements, combined with the recent determinations of the(More)
Ablation of the cellular prion protein PrP(C) leads to a chronic demyelinating polyneuropathy affecting Schwann cells. Neuron-restricted expression of PrP(C) prevents the disease, suggesting that PrP(C) acts in trans through an unidentified Schwann cell receptor. Here we show that the cAMP concentration in sciatic nerves from PrP(C)-deficient mice is(More)
Starting from a (new physics independent) tree level determination of ρ̄ and η̄, we perform the Unitarity Triangle analysis in general extensions of the Standard Model with arbitrary new physics contributions to loop-mediated processes. Using a simple parameterization, we determine the allowed ranges of non-standard contributions to |∆F | = 2 processes.(More)
Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the measurements of |Vub/Vcb|, ∆md, the lower limit on ∆ms, εK , and the measurement of the phase of the Bd–Bd mixing amplitude through the time-dependent CP(More)
A set of conceptually simple and robust algorithms for fast pattern recognition and track reconstruction using 3D space points developed for the ATLAS Level 2 (LVL2) Trigger at the LHC is presented. Results on execution time and physics performance demonstrating the effectiveness of this approach in a demanding, online trigger environment are presented.(More)
In this article we describe the architecture of the Module Controller Chip for the ATLAS Pixel Detector. The project started in 1997 with the definition of the system specifications. A first fully-working rad-soft prototype was designed in 1998, while a radiation hard version was submitted in 2000. The 1998 version was used to build pixel detector modules.(More)
The status of the unitary triangle beyond the standard model including the most recent results on Deltam[s] on dilepton asymmetries and on width differences is presented. Even allowing for general new physics loop contributions the unitarity triangle must be very close to the standard model result. With the new measurements from the Fermilab Tevatron, we(More)
-The Event Filter selection stage is a fundamental component of the ATLAS Trigger and Data Acquisition architecture. Its primary function is the reduction of data flow and rate to values acceptable by the mass storage operations and by the subsequent off-line data reconstruction and analysis steps. The computing instrument of the EF is organized as a set of(More)
A. J. Bevan, M. Bona Queen Mary, University of London, E1 4NS, United Kingdom M. Ciuchini INFN, Sezione di Roma Tre, I-00146 Roma, Italy D. Derkach, A. Stocchi Laboratoire de l’Accélérateur Linéaire, IN2P3-CNRS et Université de Paris-Sud, BP 34, F-91898 Orsay Cedex, France E. Franco, L. Silvestrini INFN, Sezione di Roma, I-00185 Roma, Italy V. Lubicz,(More)
We present an update of the Unitarity Triangle (UT) analysis, within the Standard Model (SM) and beyond. Within the SM the main novelties are the inclusion in εK of the contributions of ξ and φε 6= π/4 pointed out by A. J. Buras and D. Guadagnoli, and an accurate prediction of BR(B → τν), by using the indirect determination of |Vub| from the UT fit, which(More)