123885243
Towards supersymmetric subconstituent models
Abstract 't Hooft's consistency equations for subconstituent models are generalized to supersymmetric theories and a few solutions are outlined.
120345777
Geometrical T-violation
We investigate the possibility of having spontaneous T violation arising from complex vacuum expectation values with calculable phases, assuming geometrical values, entirely determined by the symmetry of the scalar potential.
118374875
Flavor mixing democracy and minimal CP violation
We point out that there is a unique parametrization of quark flavor mixing in which every angle is close to the Cabibbo angle theta(C) similar or equal to 13 degrees with the CP-violating phase phi(q) around 1 degrees, implying that they might all be related to the strong hierarchy among quark masses. Applying the same parametrization to lepton flavor mixing, we find that all three mixing angles are comparably large (around pi/4) and the Dirac CP-violating phase phi(l) is also minimal as compared with its values in the other eight possible parametrizations. In this spirit, we propose a simple neutrino mixing ansatz which is equivalent to the tri-bimaximal flavor mixing pattern in the phi(l) -> 0 limit and predicts sin theta(13) = 1/root 2sin(phi(l)/2) for reactor antineutrino oscillations. Hence the Jarlskog invariant of leptonic CP violation J(l) = (sin phi(l)/12) can reach a few percent if theta(13) lies in the range 7 degrees <= theta(13) <= 10 degrees. (C) 2012 Elsevier B.V. All rights reserved.
119405269
Trace anomalies and the Delta I = 1/2 rule
Trace Anomaly Dominance in weak $K$-decays successfully reproduces the $\Delta I = {1\over 2}$ selection rule results, as observed in $K_S \to \pi\pi, K_L \to \pi\pi\pi, K_S \to \gamma\gamma$ and $K_L \to \pi^0 \gamma\gamma$. Comment: 10 pages, no figure
122137370
The B parameter beyond the leading order of the 1/n expansion
We calculate the next-to-leading Image corrections to the B parameter which measures the size of the ΔS=2 matrix element Image . These corections turn out to be small which assures the validity of the 1/N expansion. For ΛQCD=0.3GeV we find B=0.66±0.10 to be compared with the leading order value B=0.75. We clarify the differences between these results and the results of the usual chiral perturbative calculations which give Image at the tree level but appear to signal the breakdown of chiral perturbation theory at the one-loop level.
8101744
Tests for the asymptotic behavior of the gamma* ---> gamma pi0 form-factor
The gamma^* --> gamma pi^0 transition measured at different photon virtualities already provides us with a clean test for the behaviour of the pi^0 gamma^* gamma off-shell axial anomaly at large time-like squared momenta. It also allows reliable predictions for the branching ratio of heavy quarkonium decays into omega pi^0. Comment: Latex, 7 pages + 1 .ps figure, comments on the Brodsky-Lepage limit and 5 new references added
59824716
The use of the FOCUS system to monitor an experiment at the CERN intersecting storage rings
60563789
The effect of the CERNET network on computing at CERN
122062189
Two years of real progress in European HEP networking : a CERN perspective
Abstract The last two years have been marked by real progress in networking in HEP. Home-made developments, studies and plans have given way to the use of real networks involving hundreds of HEP and other computers and based on externally produced software and hardware. Within the last year, the first generation of industrial software products following some of the international standards for networking have become available. Related developments are taking place in networking for on-line systems and indeed the LEP experiments are distinguished by their heavy and crucial reliance on both local and wide-area networks. This paper describes the progress made at CERN since the last two years and looks at perspectives for the future.
108010999
The development and use of a high speed packet switching network in a high-energy physics laboratory
107816989
Performance of the HPD minimum guidance systeme, pt 1