1,072 research outputs found
Scherk-Schwarz twist in 5D conformal SUGRA
We reinterpret the Scherk-Schwarz (SS) boundary condition for SU(2)_R in a
compactified five-dimensional (5D) Poincare supergravity in terms of the
twisted SU(2)_U gauge fixing in 5D conformal supergravity. In such translation,
only the compensator hypermultiplet is relevant to the SS twist, and various
properties of the SS mechanism can be easily understood. Especially we show the
equivalence between the SS twist and boundary constant superpotentials at the
full supergravity level.Comment: 4 pages, no figure, talks given at SUSY 2006 (UC Irvine) and Summer
Institute 2006 (POSTECH), to appear in Proceedings of SUSY06, the 14th
International Conference on Supersymmetry and the Unification of Fundamental
Interactions, UC Irvine, California, 12-17 June 200
Dynamical Radion Superfield in Five-dimensional Action
We clarify the radion superfield dependence of 5D N=1 superspace action. The
radion is treated as a dynamical field and appears in the action with the
correct mode function. Our derivation is systematic and based on the
superconformal formulation of 5D supergravity. We can read off the couplings of
the dynamical radion superfield to the matter superfields from our result. The
correct radion mass can be obtained by calculating the radion potential from
our superspace action.Comment: 5 pages, talks given by Y.Sakamura at PASCOS'05 (Geongju, Korea, May
30-June 4, 2005) and at SUSY'05 (Durham, U.K., July 18-23, 2005
Full diffeomorphism and Lorentz invariance in 4D superfield description of 6D SUGRA
We complete the four-dimensional superfield description of
six-dimensional supergravity. The missing ingredients in the previous works are
the superfields that contain the sechsbein ,
, ,
and the second gravitino. They are necessary to
make the action invariant under the diffeomorphisms and the Lorentz
transformations involving the extra dimensions. We find the corresponding
superfield transformation laws, and show the invariance of the action under
them. We also check that the resultant action reproduces the known superfield
description of five-dimensional supergravity through the dimensional reduction.Comment: 45 pages, some comments adde
Dynamical radion superfield in 5D action
We derive 5D N=1 superspace action including the radion superfield. The
radion is treated as a dynamical field and identified as a solution of the
equation of motion even in the presence of the radius stabilization mechanism.
Our derivation is systematic and based on the superconformal formulation of 5D
supergravity. We can read off the couplings of the dynamical radion superfield
to the matter superfields from our result. The correct radion mass can be
obtained by calculating the radion potential from our superspace action.Comment: 29 pages, no figures, LaTeX, some comments adde
N=1 superfield description of vector-tensor couplings in six dimensions
We express supersymmetric couplings among the vector and the tensor
multiplets in six dimensions (6D) in terms of N=1 superfields. The superfield
description is derived from the invariant action in the projective superspace.
The obtained expression is consistent with the known superfield actions of 6D
supersymmetric gauge theory and 5D Chern-Simons theory after the dimensional
reduction. Our result provides a crutial clue to the N=1 superfield description
of 6D supergravity.Comment: 28 pages, v2:a reference adde
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