1,820 research outputs found

### Radion effective theory in the detuned Randall-Sundrum model

We compute the two-derivative low-energy effective action for the radion in
the (supersymmetric) Randall-Sundrum scenario with detuned brane tensions. At
the classical level, a potential automatically stabilizes the distance between
the branes. In the supersymmetric case, supersymmetry can be broken
spontaneously by a vacuum expectation value for the fifth component of the
graviphoton.Comment: 17 pages. JHEP class. New Appendix. Published versio

### Mass Deformation of the Multiple M2 Branes Theory

Based on recent developments, in this letter we study the one parameter
deformation of 2+1 dimensional gauge theories with scale invariance and N = 8
supersymmetry, which is expected to be the field theory living on a stack of M2
branes. The deformed gauge theory is defined by a Lagrangian and is based on an
infinite set of novel 3-algebras constructed by relaxing the assumption that
the invariant metric is positive definite. Under the Higgs mechanism, we can
obtain the D-branes world volume theory in the presence of background fluxes.Comment: 13pages, no figures, reference adde

### Relating U(N)xU(N) to SU(N)xSU(N) Chern-Simons Membrane theories

By integrating out the U(1)_B gauge field, we show that the U(n)xU(n) ABJM
theory at level k is equivalent to a Z_k identification of the
(SU(n)xSU(n))/Z_n Chern-Simons theory, but only when n and k are coprime. As a
consequence, the k=1 ABJM model for two M2-branes in R^8 can be identified with
the N=8 (SU(2)xSU(2))/Z_2 theory. We also conjecture that the U(2)xU(2) ABJM
model at k=2 is equivalent to the N=8 SU(2)xSU(2)-theory.Comment: 16 pages, Latex; v2: references added; v3: Clarifications adde

### Matter couplings in partially broken extended supersymmetry

We use nonlinear realizations to describe the spontaneous breaking of $N=2$
supersymmetry to $N=1$ in four dimensions. We identify the Goldstone multiplet
with an $N=1$ chiral superfield, and show that chiral $N=1$ matter is
consistent with the partially broken $N=2$ supersymmetry. We find that the
chiral matter can be in any representation of the gauge group; no mirror
particles are required. We present the Goldstone action and the general
couplings to $N=1$ matter to the first nontrivial order in the scale of
symmetry breaking.Comment: JHU-TIPAC-94011, 9 pages. References adde

### Comments on Multiple M2-branes

Recently a three-dimensional field theory was derived that is consistent with
all the symmetries expected of the worldvolume action for multiple M2-branes.
In this note we examine several physical predictions of this model and show
that they are in agreement with expected M2-brane dynamics. In particular, we
discuss the quantization of the Chern-Simons coefficient, the vacuum moduli
space, a massive deformation leading to fuzzy three-sphere vacua, and a
possible large n limit. In this large n limit, the fuzzy funnel solution
correctly reproduces the mass of an M5-brane.Comment: 18 pages. Published versio

### Unifying N=5 and N=6

We write the Lagrangian of the general N=5 three-dimensional superconformal
Chern-Simons theory, based on a basic Lie superalgebra, in terms of our
recently introduced N=5 three-algebras. These include N=6 and N=8
three-algebras as special cases. When we impose an antisymmetry condition on
the triple product, the supersymmetry automatically enhances, and the N=5
Lagrangian reduces to that of the well known N=6 theory, including the ABJM and
ABJ models.Comment: 19 pages. v2: Published version. Minor typos corrected, references
adde

### Three-Algebras in N = 5, 6 Superconformal Chern-Simons Theories: Representations and Relations

In this work we present 3-algebraic constructions and representations for
three-dimensional N = 5 supersymmetric Chern-Simons theories, and show how they
relate to theories with additional supersymmetries. The N = 5 structure
constants give theories with Sp(2N) \times SO(M) gauge symmetry, as well as
more exotic symmetries known from gauged supergravity. We find explicit lifts
from N = 6 to 8, and N = 5 to 6 and 8, for appropriate gauge groups.Comment: 23 pages. Published version. References correcte

### Rigid N=2 superconformal hypermultiplets

We discuss superconformally invariant systems of hypermultiplets coupled to
gauge fields associated with target-space isometries.Comment: Invited talk given at the International Seminar "Supersymmetries and
Quantum Symmetries", July 1997, Dubna. Latex, 9 p

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