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34 papers · 1 filter
First Measurement of the Ratio B(t-->Wb)/B(t-->Wq) and Associated Limit on the CKM Element Vtb
CDF Collaboration
We present the first measurement of the ratio of branching fraction R= B(t-->wb)/B(t-->Wq) from ppbar collisions at sqrt(s)=1.8 TeV. The data set corresponds to 109 pb-1 of data re…
Measurement of the Two-Jet Differential Cross Section in proton-antiproton Collisions at sqrt{s} = 1800 GeV
CDF Collaboration
A measurement is presented of the two-jet differential cross section, d^3σ/dE_T dη_1 dη_2, at center of mass energy sqrt{s} = 1800 GeV in proton-antiproton collisions. The results…
Possible Extensions of the 4-d Schwarzschild Horizon in the Brane World
Ioannis Giannakis, Hai-cang Ren
We show that, in the absence of matter in the bulk, the Einstein equations and the Gauss-normal form of the metric place stringent restrictions on the form of the event horizon in…
Noncommutative Chern-Simons terms and the noncommutative vacuum
Alexios P. Polychronakos
It is pointed out that the space noncommutativity parameters in noncommutative gauge theory can be considered as a set of superselection parameters, in analogy with th…
Diffraction in hadron-hadron interactions
Konstantin Goulianos
Results on soft and hard diffraction in and collisions are reviewed with emphasis on factorization and scaling properties of differential cross sections. While conve…
Note on chaos and diffusion
C. P. Dettmann, E. G. D. Cohen
Using standard definitions of chaos (as positive Kolmogorov-Sinai entropy) and diffusion (that multiple time distribution functions are Gaussian), we show numerically that both cha…