Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set

We report a measurement of the bottom-strange meson mixing phase \beta_s using the time evolution of B0_s -> J/\psi (->\mu+\mu-) \phi (-> K+ K-) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the full data set of proton-antiproton collisions at sqrt(s)= 1.96 TeV collected by the Collider Detector experiment at the Fermilab Tevatron, corresponding to 9.6 fb-1 of integrated luminosity. We report confidence regions in the two-dimensional space of \beta_s and the B0_s decay-width difference \Delta\Gamma_s, and measure \beta_s in [-\pi/2, -1.51] U [-0.06, 0.30] U [1.26, \pi/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of \beta_s, we also determine \Delta\Gamma_s = 0.068 +- 0.026 (stat) +- 0.009 (syst) ps-1 and the mean B0_s lifetime, \tau_s = 1.528 +- 0.019 (stat) +- 0.009 (syst) ps, which are consistent and competitive with determinations by other experiments.Comment: 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012

Convolution based face recognition using DWT and HOG

Physiological face biometric trait is used to identify a person for many real time applications. The convolution based feature extraction technique for face identification using Discrete Wavelet Transform (DWT) and Histogram of Oriented Gradient (HOG) is proposed to recognize human beings effectively. The four standard face databases with different sizes are considered and resized to 128×128 to have uniform size of images. The 2D-DWT (Two Dimensional Discrete Wavelet Transform) is applied on resized face images and considered only (LL) sub-band. The HOG is applied on LL subband to obtain HOG coefficients. The 2D convolution is used on LL sub-band and HOG matrix to obtain final features. The resized face image is compressed using DWT and HOG. The Euclidean distance(ED) is used to compare features of database face images with test images to compute performance parameters. The performance

Synthesis and crystal structure of 5-allyl 5Hdibenzo [b,f]azepine

The crystals 5H-dibenzo[b,f]azepine 2 and 5-allyl-5H-dibenzo[b,f]azepine 3 were synthesized and characterized by X-ray crystallography. The compound 3 is a novel synthon for the construction of unusual isoxazoli(ne)dine rings bearing at the 5th position of dibenzo[b,f]azepine moiety. The compound 2 (C14H11N) crystallizes in the orthorhombic space group P212121 with the parameters a = 6.036(1) Å, b = 8.250(7) Å, c = 20.528(4) Å, Z = 4 and the final R factor is R1 = 0.0544. The compound 3 (C17H15N) crystallizes in the Hexagonal space group P61 with the parameters a = 11.043(9) Å, c = 18.575 Å, Z = 6 and the final R factor is R1 = 0.0373