24 research outputs found
Note on antisymmetric spin-tensors
It was known for a long time that in d = 4 dimensions it is impossible to
construct the Lagrangian for antisymmetric second rank spin-tensor that will be
invariant under the gauge transformations with unconstrained spin-vector
parameter. But recently a paper arXiv:0902.1471 appeared where gauge invariant
Lagrangians for antisymmetric spin-tensors of arbitrary rank n in d > 2n were
constructed using powerful BRST approach. To clarify apparent contradiction, in
this note we carry a direct independent analysis of the most general first
order Lagrangian for the massless antisymmetric spin-tensor of second rank. Our
analysis shows that gauge invariant Lagrangian does exist but in d > 4
dimensions only, while in d = 4 this Lagrangian becomes identically zero. As a
byproduct, we obtain a very simple and convenient form of this massless
Lagrangian that makes deformation to AdS space and/or massive case a simple
task as we explicitly show here. Moreover, this simple form admits natural and
straightforward generalization on the case of massive antisymmetric
spin-tensors of rank n for d > 2n.Comment: 7 pages, no figure
Towards frame-like gauge invariant formulation for massive mixed symmetry bosonic fields. II. General Young tableau with two rows
In this paper we complete our construction of frame-like gauge invariant
description for massive mixed symmetry tensor fields corresponding to arbitrary
Young tableau with two rows started in [1]. We consider general massive theory
in (A)dS spaces with arbitrary cosmological constant as well as all special
limits which exist both in de Sitter and in anti-de Sitter spaces.Comment: 22 pages, 11 LaTeX picture
Dual versions of extended supergravities
Recently, using the model of N=2 supergravity -- vector multiplets
interaction with the scalar field geometry as an
example, we have shown that even when the scalar field geometry is fixed, one
can have a whole family of the Lagrangians, which differ by vector field
duality transformation. In this paper we carry out the construction of such
families for the case of N=3 and N=4 supergravities, the scalar field geometry
being and , correspondingly. Moreover, it turns out that these
families contain, as a partial case, the models describing the interaction of
arbitrary number of vector multiplets with our hidden sectors, admitting
spontaneous supersymmetry breaking without a cosmological term.Comment: 9 pages, plain LaTeX, no figure
Toward frame-like gauge invariant formulation for massive mixed symmetry bosonic fields
In this paper, as a first step toward frame-like gauge invariant formulation
for massive mixed symmetry bosonic fields, we consider mixed tensors,
corresponding to Young tableau with two rows with k >= 2 boxes in the first row
and only one box in the second one. We construct complete Lagrangian and gauge
transformations describing massive particles in (anti) de Sitter space-time
with arbitrary dimension d >= 4 and investigate all possible massless and
partially massless limits.Comment: 18 pages, 9 LaTeX picture
On massive spin 2 electromagnetic interactions
In this paper we investigate electromagnetic interactions for massive spin 2
particles in (A)dS space at linear approximation using gauge invariant
description for such massive particles. We follow bottom-up approach, i.e. we
begin with the introduction of minimal interaction and then proceed by adding
non-minimal interactions with higher and higher number of derivatives together
with corresponding non-minimal corrections to gauge transformations until we
are able to restore gauge invariance broken by transition to gauge covariant
derivatives. We manage to construct a model that smoothly interpolates between
massless particle in (A)dS space and massive one in a flat Minkowski space.
Also we reproduce the same results in a frame-like formalism which can be more
suitable for generalizations on higher spins.Comment: 24 pages, no figures. Clarifications and references added. Version to
appear in Nucl. Phys.
Frame-like gauge invariant formulation for massive high spin particles
In this paper we extend a so called frame-like formulation of massless high
spin particles to massive case. We start with two explicit examples of massive
spin 2 and spin 3 particles and then construct gauge invariant description for
arbitrary integer spin case. Similarly, for the fermionic case we start with
first non-trivial example -- massive spin 5/2 particle and then construct gauge
invariant description for arbitrary half-integer spin case. In all cases we
consider massive particles in (A)dS spaces with arbitrary cosmological constant
(including flat Minkowski space) and this allows one to investigate all
possible massless and partially massless limits for such particles.Comment: 21 pages, no figure
Gauge invariant Lagrangian formulation of massive higher spin fields in (A)dS_3 space
We develop the frame-like formulation of massive bosonic higher spins fields
in the case of 3-dimensional space with the arbitrary cosmological
constant. The formulation is based on gauge-invariant description by involving
the Stueckelberg auxiliary fields. The explicit form of the Lagrangians and the
gauge transformation laws are found. The theory can be written in terms of
gauge-invariant objects similar to the massless theories, thus allowing us to
hope to use the same methods for investigation of interactions. In the massive
spin 3 field example we are able to rewrite the Lagrangian using the new the
so-called separated variables, so that the study of Lagrangian formulation
reduces to finding the Lagrangian containing only half of the fields. The same
construction takes places for arbitrary integer spin field as well. Further
working in terms of separated variables, we build Lagrangian for arbitrary
integer spin and write it in terms of gauge-invariant objects. Also, we
demonstrate how to restore the full set of variables, thus receiving Lagrangian
for the massive fields of arbitrary spin in the terms of initial fields.Comment: 12 page
Frame-like gauge invariant formulation for mixed symmetry fermionic fields
In this paper we consider frame-like formulation for mixed symmetry
spin-tensors corresponding to arbitrary Young tableau with two rows. First of
all, we extend Skvortsov formulation for massless mixed symmetry bosonic fields
in flat Minkowski space to the case of massless fermionic fields. Then, using
such massless fields as building blocks, we construct gauge invariant
formulation for massive spin-tensors with the same symmetry properties. We give
general massive theories in (A)dS spaces with arbitrary cosmological constant
and investigate all possible massless and partially massless limits.Comment: 30 pages, 10 LaTeX picture