Cosmological perturbations in brane-world theories: Formalism
Physical Review D - Particles, Fields, Gravitation and Cosmology 62:12 (2000) 1-13
Abstract:
We develop a gauge-invariant formalism to describe metric perturbations in five-dimensional brane-world theories. In particular, this formalism applies to models originating from heterotic M theory. We introduce a generalized longitudinal gauge for scalar perturbations. In this gauge, we derive the five-dimensional evolution equations for scalar perturbations as well as the most general structure of the scalar brane stress-energy tensor. As an application, we discuss some aspects of the evolution of fluctuations on the brane. Moreover, we show how the five-dimensional formalism can be matched to the known four-dimensional one in the limit where an effective four-dimensional description is appropriate. ©2000 The American Physical Society.Evidence for an inflationary phase transition from the LSS and CMB anisotropy data
(2000)
Solar neutrino oscillation from large extra dimensions
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 495:1-2 (2000) 136-146
Abstract:
A plausible explanation for the existence of additional light sterile neutrinos is that they correspond to modulini, fermionic partners of moduli, which propagate in new large dimensions. We discuss the phenomenological implications of such states and show that solar neutrino oscillation is well described by small angle MSW oscillation to the tower of Kaluza-Klein states associated with the modulini. In the optimal case the recoil electron energy spectrum agrees precisely with the measured one, in contrast to the single sterile neutrino case which is disfavoured. We also consider how all oscillation phenomena can be explained in a model including bulk neutrino states. In particular, we show that a naturally maximal mixing for atmospheric neutrinos can be easily obtained. (C) 2000 Published by Elsevier Science B.V.Review of particle physics
15:1-4 (2000) 1-878
Abstract:
This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 2000 new measurements from 610 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We also summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, particle detectors, probability, and statistics. A booklet is available containing the Summary Tables and abbreviated versions of some of the other sections of this full Review. © 2000 Regents of the University of California.ℤ2 monopoles in D = 2 + 1 SU(2) lattice gauge theory
Journal of High Energy Physics 4:11 (2000) 10-12