We have measured the W-boson mass M_{W} using data corresponding to 2.2  fb^{-1} of integrated luminosity collected in pp[over ¯] collisions at sqrt[s]=1.96  TeV with the CDF II detector at the Fermilab Tevatron collider. Samples consisting of 470 126 W→eν candidates and 624 708 W→μν candidates yield the measurement M_{W}=80 387±12_{stat.}±15_{syst.}=80 387±19  MeV/c^{2}. This is the most precise measurement of the W-boson mass to date and significantly exceeds the precision of all previous measurements combined.

The angular distributions of muons from Υ(1S,2S,3S)→μ^{+}μ^{-} decays are measured using data from pp[over ¯] collisions at sqrt[s]=1.96  TeV corresponding to an integrated luminosity of 6.7  fb^{-1} and collected with the CDF II detector at the Fermilab Tevatron. This analysis is the first to report the full angular distributions as functions of transverse momentum p_{T} for Υ mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of Υ(3S) mesons. Within the kinematic range of Υ rapidity |y|<0.6 and p_{T} up to 40  GeV/c, the angular distributions are found to be nearly isotropic.

We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays B→K^{(*)}μ^{+}μ^{-}. We reconstruct the decays and measure their angular distributions, as a function of q^{2}=M_{μμ}^{2}c^{2}, where M_{μμ} is the dimuon mass, in pp[over ¯] collisions at sqrt[s]=1.96  TeV using a data sample corresponding to an integrated luminosity of 6.8  fb^{-1}. The transverse polarization asymmetry A_{T}^{(2)} and the time-reversal-odd charge-and-parity asymmetry A_{im} are measured for the first time, together with the K^{*} longitudinal polarization fraction F_{L} and the muon forward-backward asymmetry A_{FB} for the decays B^{0}→K^{*0}μ^{+}μ^{-} and B^{+}→K^{*+}μ^{+}μ^{-}. The B→K^{*}μ^{+}μ^{-} forward-backward asymmetry in the most sensitive kinematic regime, 1≤q^{2}<6  GeV^{2}/c^{2}, is measured to be A_{FB}=0.29_{-0.23}^{+0.20}(stat)±0.07(syst), the most precise result to date. No deviations from the standard model predictions are observed.

We have observed exclusive γγ production in proton-antiproton collisions at sqrt[s]=1.96  TeV, using data from 1.11±0.07  fb^{-1} integrated luminosity taken by the Run II Collider Detector at Fermilab. We selected events with two electromagnetic showers, each with transverse energy E_{T}>2.5  GeV and pseudorapidity |η|<1.0, with no other particles detected in -7.4<η<+7.4. The two showers have similar E_{T} and azimuthal angle separation Δϕ∼π; 34 events have two charged particle tracks, consistent with the QED process pp[over ¯]→p+e^{+}e^{-}+p[over ¯] by two-photon exchange, while 43 events have no charged tracks. The number of these events that are exclusive π^{0}π^{0} is consistent with zero and is <15 at 95% C.L. The cross section for pp[over ¯]→p+γγ+p[over ¯] with |η(γ)|<1.0 and E_{T}(γ)>2.5  GeV is 2.48_{-0.35}^{+0.40}(stat)_{-0.51}^{+0.40}(syst)  pb.

In this Letter, we present a precise measurement of the total ZZ production cross section in pp[over ¯] collisions at sqrt[s]=1.96  TeV, using data collected with the CDF II detector corresponding to an integrated luminosity of approximately 6  fb^{-1}. The result is obtained by combining separate measurements in the four-charged (ℓℓℓ^{'}ℓ^{'}) and two-charged-lepton and two-neutral-lepton (ℓℓνν) decay modes of the Z boson pair. The combined measured cross section for pp[over ¯]→ZZ is 1.64_{-0.38}^{+0.44}  pb. This is the most precise measurement of the ZZ production cross section in 1.96 TeV pp[over ¯] collisions to date.

Nanostructured Pd-Fe thin films with varied Fe content were prepared by electrodeposition technique from organic electrolytes on Cu and brass substrates. The structure and the magnetic properties of the films were investigated prior to post-deposition annealing. The structure of the Pd1-xFe(x) thin film with x = 0.14, 0.24, and 0.52 was determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM) as a solid solution of iron in palladium face-centered cubic lattice with the (111) orientation of nanograins relatively to the substrate surface. The films with higher iron concentration, x = 0.74, 0.91, have structure of a solid solution based on the body-centered cubic lattice. The average grain size determined by the scanning electron microscopy (SEM) for the first two alloys is 7-10 nm, and for the latter ones it is about 120 nm. The saturation magnetization of the films has linear dependence on the iron content, but coercivity has non-monotonic dependence on x, i.e., the films with x = 0.68 show highest coercivity. The magnetic anisotropy of the samples is studied by ferromagnetic resonance (FMR) spectroscopy.

A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 7.0  fb{-1} of integrated luminosity from pp collisions at sqrt[s]=1.96  TeV collected by the CDF experiment. No evidence of such a resonance is observed, and upper limits are set on the cross section times branching ratio of the resonant state as a function of Higgs boson mass. The limits are interpreted in the context of the standard model and one fermiophobic benchmark model where the data exclude fermiophobic Higgs bosons with masses below 114  GeV/c{2} at a 95% Bayesian credibility level.

We present a measurement of the B_{s}^{0} lifetime in fully and partially reconstructed B_{s}^{0}→D_{s}^{-}(ϕπ^{-})X decays in 1.3  fb^{-1} collected in pp[over ¯] collisions at sqrt[s]=1.96  TeV by the CDF II detector at the Fermilab Tevatron. We measure τ(B_{s}^{0})=1.518±0.041(stat)±0.027(syst)  ps. The ratio of this result and the world average B^{0} lifetime yields τ(B_{s}^{0})/τ(B^{0})=0.99±0.03, which is in agreement with recent theoretical predictions.