5,623 research outputs found
B Physics in the Next Millennium
As we approach the turn of the century, the Standard Model is still
consistent with all our experimental observations and the path to a more
complete picture of the fundamental constituents and their interactions has yet
to be clearly identified. Beauty flavored hadrons have provided crucial
experimental information on several fundamental parameters of the Standard
Model and may lead to one of the most challenging test of its validity and
provide some clues on the path towards a more complete theory. Several
experiments will try to explore this rich phenomenology in the next few years.
Their physics goals and discovery potential will be compared.Comment: 11 pages, 4 Figures, Talk given at HQ98, Batavia, Il, October 199
Recycling Parrondo games
We consider a deterministic realization of Parrondo games and use periodic
orbit theory to analyze their asymptotic behavior.Comment: 12 pages, 9 figure
The Lepton-Number-Violating Decays of and Mesons Induced by the Doubly Charged Higgs Boson
The lepton-number-violating decays of and mesons induced
by the doubly charged Higgs boson have been studied. It is found that although
the yielded results of the branch ratio are much smaller than the present
limits from the data they are consistent with the previous conclusions
calculated in the framwork of relativistic quark model where the processes
happened via the light Majorana neutrinos.Comment: version to appear in PR
Fractal diffusion coefficient from dynamical zeta functions
Dynamical zeta functions provide a powerful method to analyze low dimensional
dynamical systems when the underlying symbolic dynamics is under control. On
the other hand even simple one dimensional maps can show an intricate structure
of the grammar rules that may lead to a non smooth dependence of global
observable on parameters changes. A paradigmatic example is the fractal
diffusion coefficient arising in a simple piecewise linear one dimensional map
of the real line. Using the Baladi-Ruelle generalization of the
Milnor-Thurnston kneading determinant we provide the exact dynamical zeta
function for such a map and compute the diffusion coefficient from its smallest
zero.Comment: 8 pages, 2 figure
Performance of a C4F8O Gas Radiator Ring Imaging Cherenkov Detector Using Multi-anode Photomultiplier Tubes
We report on test results of a novel ring imaging Cherenkov (RICH) detection
system consisting of a 3 meter long gaseous C4F8O radiator, a focusing mirror,
and a photon detector array based on Hamamatsu multi-anode photomultiplier
tubes. This system was developed to identify charged particles in the momentum
range from 3-70 GeV/c for the BTeV experiment.Comment: 28 pages, 23 figures, submitted to Nuclear Instruments and Method
Periodic orbit quantization of the Sinai billiard in the small scatterer limit
We consider the semiclassical quantization of the Sinai billiard for disk
radii R small compared to the wave length 2 pi/k. Via the application of the
periodic orbit theory of diffraction we derive the semiclassical spectral
determinant. The limitations of the derived determinant are studied by
comparing it to the exact KKR determinant, which we generalize here for the A_1
subspace. With the help of the Ewald resummation method developed for the full
KKR determinant we transfer the complex diffractive determinant to a real form.
The real zeros of the determinant are the quantum eigenvalues in semiclassical
approximation. The essential parameter is the strength of the scatterer
c=J_0(kR)/Y_0(kR). Surprisingly, this can take any value between plus and minus
infinity within the range of validity of the diffractive approximation kR <<4.
We study the statistics exhibited by spectra for fixed values of c. It is
Poissonian for |c|=infinity, provided the disk is placed inside a rectangle
whose sides obeys some constraints. For c=0 we find a good agreement of the
level spacing distribution with GOE, whereas the form factor and two-point
correlation function are similar but exhibit larger deviations. By varying the
parameter c from 0 to infinity the level statistics interpolates smoothly
between these limiting cases.Comment: 17 pages LaTeX, 5 postscript figures, submitted to J. Phys. A: Math.
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