We measure the time dependence of the ratio of decay rates for the rare decay D{0}-->K{+}pi{-} to the Cabibbo-favored decay D{0}-->K{-}pi;{+}. A signal of 12.7x10;{3} D{0}-->K{+}pi{-} decays was obtained using the Collider Detector at Fermilab II detector at the Fermilab Tevatron with an integrated luminosity of 1.5 fb;{-1}. We measure the D0-D[over ]{0} mixing parameters (R_{D},y{'},x{'2}), and find that the data are inconsistent with the no-mixing hypothesis with a probability equivalent to 3.8 Gaussian standard deviations.

We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of γ+jet+missing transverse energy events in pp collisions at s√=1.96  TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570  pb−1 of collision data, we observe 2 events, consistent with the background estimate of 1.3±0.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits in a supersymmetric model with χ˜01→γG˜ and place the world-best 95% C.L. lower limit on the χ˜01 mass of 101  GeV/c2 at τχ˜01=5  ns

Data collected in Run II of the Fermilab Tevatron are searched for indications of new electroweak scale physics. Rather than focusing on particular new physics scenarios, CDF data are analyzed for discrepancies with respect to the standard model prediction. A model-independent approach (Vista) considers the gross features of the data, and is sensitive to new large cross section physics. A quasi-model-independent approach (Sleuth) searches for a significant excess of events with large summed transverse momentum, and is particularly sensitive to new electroweak scale physics that appears predominantly in one final state. This global search for new physics in over three hundred exclusive final states in 927 pb −1 of pp collisions at √ s = 1.96 TeV reveals no such significant indication of physics beyond the standard model. * With visitors from

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Using the full CDF Run II data sample, we report evidence for a new resonance, which we refer to as Bð5970Þ, found simultaneously in the B 0 π þ and B þ π − mass distributions with a significance of 4.4 standard deviations. We further report the first study of resonances consistent with orbitally excited B þ mesons and an updated measurement of the properties of orbitally excited B 0 and B 0 s mesons. We measure the masses and widths of all states, as well as the relative production rates of the B 1 , B Ã 2 , and Bð5970Þ states and the branching fraction of the B Ã0 s2 state to either B Ãþ K − and B þ K − . Furthermore, we measure the production rates of the orbitally excited B 0;þ states relative to the B 0;þ ground state. Visitor from Università degli Studi di Napoli Federico I, I-80138 Napoli, Italy. STUDY OF ORBITALLY EXCITED B MESONS AND …PHYSICAL REVIEW D 90, 012013 (2014) 012013-3into Bπ final states. The properties of the orbitally excited and the new Bð5970Þ 0;þ states are compatible with isospin symmetry.