5,594 research outputs found
Conformal Coupling of Higher Spin Gauge Fields to a Scalar Field in and Generalized Weyl Invariance
The higher spin interaction currents for the conformally coupled scalar in
space for both regular and irregular boundary condition corresponding
to the free and interacting critical point of the boundary O(N) sigma model are
constructed. The explicit form of the linearized interaction of the scalar and
spin two and four gauge fields in the space using Noether's procedure
for the corresponding spin two and four linearized gauge and generalized Weyl
transformations are obtained.Comment: Latex, 12 page
Higher spins dynamics in the closed string theory
The general -model-type string action including both massless and
massive higher spins background fields is suggested. Field equations for
background fields are followed from the requirement of quantum Weyl invariance.
It is shown that renormalization of the theory can be produced level by level.
The detailed consideration of background fields structure and corresponding
fields equations is given for the first massive level of the closed bosonic
string.Comment: 11 pages, report TSU/QFTD-36/9
The Matsubara-Fradkin Thermodynamical Quantization of Podolsky Electrodynamics
In this work we apply the Matsubara-Fradkin formalism and the Nakanishi's
auxiliary field method to the quantization of the Podolsky electrodynamics in
thermodynamic equilibrium. This approach allows us to write consistently the
path integral representation for the partition function of gauge theories in a
simple manner. Furthermore, we find the Dyson-Schwinger-Fradkin equations and
the Ward-Fradkin-Takahashi identities for the Podolsky theory. We also write
the most general form for the polarization tensor in thermodynamic equilibrium.Comment: Submitted to Physical Review
Spinor and Isospinor Structure of Relativistic Particle Propagators
Representations by means of path integrals are used to find spinor and
isospinor structure of relativistic particle propagators in external fields.
For Dirac propagator in an external electromagnetic field all grassmannian
integrations are performed and a general result is presented via a bosonic path
integral. The spinor structure of the integrand is given explicitly by its
decomposition in the independent -matrix structures. Similar technique
is used to get the isospinor structure of the scalar particle propagator in an
external non-Abelian field.Comment: 9 pages, Preprint IC/93/197 Triest
Conformal Symmetry and Central Charges in 4 Dimensions
The trace anomaly of matter in curved space generates an effective action for
the conformal factor of the metric tensor in dimensions, analogous to the
Polyakov action for . We compute the contributions of the
reparameterization ghosts to the central charges for , as well as the
quantum contribution of the conformal factor itself. The ghost contribution
satisfies the necessary Wess-Zumino consistency condition only if combined with
the spin-2 modes, whose contributions to the trace anomaly we also discuss.Comment: 20 pages, corrected tex versio
Electromagnetic field at Finite Temperature: A first order approach
In this work we study the electromagnetic field at Finite Temperature via the
massless DKP formalism. The constraint analysis is performed and the partition
function for the theory is constructed and computed. When it is specialized to
the spin 1 sector we obtain the well-known result for the thermodynamic
equilibrium of the electromagnetic field.Comment: 6 pages, Latex2e, title changed and minimal modification
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