5,687 research outputs found
Phenomenological Implications of the Topflavor Model
We explore phenomenologies of the topflavour model for the LEP experiment at
scale and the atomic parity violation (APV) experiment in the
atoms at low energies. Implications of the model on the peak data are
studied in terms of the precision variables 's. We find that the
LEP data give more stringent constraints on the model parameters than the APV
data.Comment: 23 pages (including 5 .eps figs), ReVTeX, the 1st revised version, to
appear in Phys. Lett.
Spacetime structure of 5D hypercylindrical vacuum solutions with tension
We investigate geometrical properties of 5D cylindrical vacuum solutions with
a transverse spherical symmetry. The metric is uniform along the fifth
direction and characterized by tension and mass densities. The solutions are
classified by the tension-to-mass ratio. One particular example is the
well-known Schwarzschild black string which has a curvature singularity
enclosed by a horizon. We focus mainly on geometry of other solutions which
possess a naked singularity. The light signal emitted by an object approaching
the singularity reaches a distant observer with finite time, but is infinitely
red-shifted.Comment: revtex4, 5 pages, 2 figures. To appear in the proceedings of the 10th
Asia Pacific Physics Conference (APPC10), Pohang, Korea, 21-24 Aug. 2007.
Submitted to J. Korean Phys. Soc. Penrose diagram has been adde
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