167,789 research outputs found
Gauge Interaction as Periodicity Modulation
The paper is devoted to a geometrical interpretation of gauge invariance in
terms of the formalism of field theory in compact space-time dimensions
[arXiv:0903.3680]. In this formalism, the kinematic information of an
interacting elementary particle is encoded on the relativistic geometrodynamics
of the boundary of the theory through local transformations of the underlying
space-time coordinates. Therefore, gauge interaction is described as invariance
of the theory under local deformations of the boundary, the resulting local
variations of field solution are interpreted as internal transformations, and
the internal symmetries of the gauge theory turn out to be related to
corresponding local space-time symmetries. In the case of local infinitesimal
isometric transformations, Maxwell's kinematics and gauge invariance are
inferred directly from the variational principle. Furthermore we explicitly
impose periodic conditions at the boundary of the theory as semi-classical
quantization condition in order to investigate the quantum behavior of gauge
interaction. In the abelian case the result is a remarkable formal
correspondence with scalar QED.Comment: 37 pages, 2 figures. Version published in Annals of Physics (2012).
New title, comments and minor correction
Classical geometry to quantum behavior correspondence in a Virtual Extra Dimension
In the Lorentz invariant formalism of compact space-time dimensions the
assumption of periodic boundary conditions represents a consistent
semi-classical quantization condition for relativistic fields. In
[arXiv:0903.3680] we have shown, for instance, that the ordinary Feynman path
integral is obtained from the interference between the classical paths with
different winding numbers associated with the cyclic dynamics of the field
solutions. By means of the boundary conditions, the kinematics information of
interactions can be encoded on the relativistic geometrodynamics of the
boundary [arXiv:1110.0315]. Furthermore, such a purely four-dimensional theory
is manifestly dual to an extra-dimensional field theory. The resulting
correspondence between extra-dimensional geometrodynamics and ordinary quantum
behavior can be interpreted in terms of AdS/CFT correspondence. By applying
this approach to a simple Quark-Gluon-Plasma freeze-out model we obtain
fundamental analogies with basic aspects of AdS/QCD phenomenology.Comment: 60 pages. Version published in Annals of Physics (2012). Minor
correction
Elementary spacetime cycles
Every system in physics is described in terms of interacting elementary
particles characterized by modulated spacetime recurrences. These intrinsic
periodicities, implicit in undulatory mechanics, imply that every free particle
is a reference clock linking time to the particle's mass, and every system is
formalizable by means of modulated elementary spacetime cycles. We propose a
novel consistent relativistic formalism based on intrinsically cyclic spacetime
dimensions, encoding the quantum recurrences of elementary particles into
spacetime geometrodynamics. The advantage of the resulting theory is a formal
derivation of quantum behaviors from relativistic mechanics, in which the
constraint of intrinsic periodicity turns out to quantize the elementary
particles; as well as a geometrodynamical description of gauge interaction
which, similarly to gravity, turns out to be represented by relativistic
modulations of the internal clocks of the elementary particles. The
characteristic classical to quantum correspondence of the theory brings novel
conceptual and formal elements to address fundamental open questions of modern
physics.Comment: 6 pages. Accepted for publication in Europhysics Letters (EPL) 30
April 201
Elastic pbar-d scattering and total pbar-d cross sections
Elastic pbar-d scattering is studied within the Glauber theory based on the
single- and double pbar-N scattering mechanisms. The full spin dependence of
the elementary pbar-N scattering amplitudes is taken into account and both the
S- and D-wave components of the deuteron are considered. The treatment of the
spin dependence is done in a (properly modified) formalism developed recently
by Platonova and Kukulin for the pd -> pd scattering process. Predictions for
differential cross sections and the spin observables A_y^d, A_y^pbar, A_xx,
A_yy are presented for antiproton beam energies between 50 and 300 MeV, using
amplitudes generated from the Nbar-N interaction model developed by the Juelich
group. Total polarized cross sections are calculated utilizing the optical
theorem. The efficiency of the polarization buildup for antiprotons in a
storage ring is investigated.Comment: 14 pages, 15 figures; some comments added, figure added, signs of
some spin-dependent cross sections correcte
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