5 research outputs found
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
Hong Kong identity and the press–politics dynamics: a corpus-assisted discourse study
This is an Author's Original Manuscript of an article submitted for consideration in the Asian Journal of Communication [Taylor and Francis © AMIC/SCI-NTU]. Asian Journal of Communication is available online at http://www.tandfonline.com/ and the definitive version is available at:
http://dx.doi.org/10.1080/01292986.2012.701315This article uses corpus-assisted discourse studies to examine the discursive construction of collective identity in the Hong Kong press, particularly with regard to its relationship with mainland China. Drawing on critical discourse analysis and collective identity theory, it develops a set of analytical techniques amenable to quantification, and applies it to a corpus of newspaper coverage of the 2005 Hong Kong Chief Executive election. The article uses these techniques not only to develop a representative description and interpretation of discursive patterns, but also to offer an explanatory account of the discursive construction of Hong Kong identity. It shows that the discursive patterns vary systematically depending on newspaper ownership, commercial imperatives, and newspaper type
The predictive ability of the 313 variant–based polygenic risk score for contralateral breast cancer risk prediction in women of European ancestry with a heterozygous BRCA1 or BRCA2 pathogenic variant
Purpose: To evaluate the association between a previously published 313 variant–based breast cancer (BC) polygenic risk score (PRS313</su