7,243 research outputs found
Geometries of orthogonal groups and their contractions: a unified classical deformation viewpoint
The geometries of spaces having as groups the real orthogonal groups and some
of their contractions are described from a common point of view. Their central
extensions and Casimirs are explicitly given. An approach to the trigonometry
of their spaces is also advanced.Comment: 9 pages, LaTeX; contribution presented by M.Santander to the II
International Workshop on Classical and Quantum Integrible Systems (Dubna,
8-12 July,1996), to be published in Int.J.Mod.Phys.
Radiation Damping in a Non-Abelian Strongly-Coupled Gauge Theory
We study a `dressed' or `composite' quark in strongly-coupled N=4
super-Yang-Mills (SYM), making use of the AdS/CFT correspondence. We show that
the standard string dynamics nicely captures the physics of the quark and its
surrounding quantum non-Abelian field configuration, making it possible to
derive a relativistic equation of motion that incorporates the effects of
radiation damping. From this equation one can deduce a non-standard dispersion
relation for the composite quark, as well as a Lorentz covariant formula for
its rate of radiation.Comment: 10 pages; based on talks at Quantum Theory and Symmetries 6 and the
XII Mexican Workshop of Particles and Fields
Study of the average vertical distribution of temperature in the martian atmosphere final report
Convective-radiative equilibrium model for computing temperature profile - vertical temperature distribution in Martian atmospher
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