16,238 research outputs found
The Vector-Tensor Supermultiplet with Gauged Central Charge
The vector-tensor multiplet is coupled off-shell to an N=2 vector multiplet
such that its central charge transformations are realized locally. A gauged
central charge is a necessary prerequisite for a coupling to supergravity and
the strategy underlying our construction uses the potential for such a coupling
as a guiding principle. The results for the action and transformation rules
take a nonlinear form and necessarily include a Chern-Simons term. After a
duality transformation the action is encoded in a homogeneous holomorphic
function consistent with special geometry.Comment: 8 pages, LATE
Generalized gaugings and the field-antifield formalism
We discuss the algebra of general gauge theories that are described by the
embedding tensor formalism. We compare the gauge transformations dependent and
independent of an invariant action, and argue that the generic transformations
lead to an infinitely reducible algebra. We connect the embedding tensor
formalism to the field-antifield (or Batalin-Vilkovisky) formalism, which is
the most general formulation known for general gauge theories and their
quantization. The structure equations of the embedding tensor formalism are
included in the master equation of the field-antifield formalism.Comment: 42 pages; v2: some clarifications and 1 reference added; version to
be published in JHE
New dance development at Dartington College of Arts UK 1971 - 1987
An explorative examination of the phenomenon of New Dance is undertaken through a case study of events at Dartington College of Arts over the period 1971-1987. This socio-historical study, informed by the firsthand accounts of a group of practitioners (artists/teachers), highlights
the New Dance development in an educational context. Moving from the broad to the specific, the chapters present contextualised evidence from multiple sources in chronological order. Each chapter substantiates the
claim that Dartington was an original and important source of New Dance development in the UK throughout the period of its development (1970s-1980s). Firstly, a broadly sketched contextual frame links the New Dance development to features from other realms and the movement of the New in
dance to its own tradition. Then the historical background to Dartington illuminates how the College became a key educational forerunner in the complex of UK dance culture during the 1970s. Documentary and oral sources serve to illustrate the unique position of Dartington and its
dance programme at the time. Phase One of the New Dance development (1971-1978) sees new approaches to dance, movement and the body incorporated in the structure and curriculum of the 'Theatre Language' BA (Hans) course and accredited as a main subject of study by the CNAA in 1977. With the UK dance domain and cultural conventions as context, different features and aspects of the New Dance development are revealed. The New Dance era is established as a turbulent period of change, challenge and innovation. These contexts implicitly demonstrate Dartington's special place and pioneering role as an institute of higher
education in the overall development and formation of the New Dance movement and community. Dartington's function in the articulation, expansion and dissemination of practice and ideas becomes even more pronounced during Phase Two of the continued New Dance development (1978-1987). This is exemplified by a decade of annual dance festivals hosted by the College and attended by hundreds of dancers from the UK
and abroad. A gradual transition out of this optimum time can be detected both at the festivals and the Theatre Department from 1985 onwards. By the late 1980s a notably changed cultural climate signals the end of an erä and allows the assessment of this creative period of
development in dance, both in and outside of Dartington. The detailed insight provided by the case study helps to unravel the multi-layered nature of the New Dance phenomenon. This includes the identification of
a dynamic network of relationships, people, organisations and events as elements in a movement of change, which contributed to the broadening base of dance. As exemplified by the case study, the structural developments in arts education played a major part in this expansion and
this is where Dartington College of Arts made its key contribution
T-duality and Actions for Non-BPS D-branes
We employ T-duality to restrict the tachyon dependence of effective actions
for non-BPS D-branes. For the Born-Infeld part the criteria of T-duality and
supersymmetry are satisfied by a simple extension of the D-brane Born-Infeld
action.Comment: Latex, 11 page
More on the scalar-tensor B-F theory
This work is based on an earlier proposal \cite{hs} that the membrane B-F
theory consists of matter fields alongwith Chern-Simons fields as well as the
auxiliary pairs of scalar and tensor fields. We especially discuss the
supersymmetry aspects of such a membrane theory. It is concluded that the
theory possesses maximal supersymmetry and it is related to the L-BLG theory
via a field map. We obtain fuzzy-sphere solution and corresponding tensor field
configuration is given.Comment: 19 pages; v2 typo corrected and more reference
Nonholomorphic Corrections to the One-Loop N=2 Super Yang-Mills Action
In addition to the familiar contribution from a holomorphic function \FF,
the K\"ahler potential of the scalars in the nonabelian vector multiplet
receives contributions from a real function \HH. We determine the latter at
the one-loop level, taking into account both supersymmetric matter and gauge
loops. The function \HH characterizes the four-point coupling of the
vector-multiplet vectors for constant values of their scalar superpartners. We
discuss the consequences of our results.Comment: 11 pages, Latex, one Postscript figure. Corrections to equation (24):
1 missing term added and one pair of indices interchange
The Gauging of Five-dimensional, N=2 Maxwell-Einstein Supergravity Theories coupled to Tensor Multiplets
We study the general gaugings of N=2 Maxwell-Einstein supergravity theories
(MESGT) in five dimensions, extending and generalizing previous work. The
global symmetries of these theories are of the form SU(2)_R X G, where SU(2)_R
is the R-symmetry group of the N=2 Poincare superalgebra and G is the group of
isometries of the scalar manifold that extend to symmetries of the full action.
We first gauge a subgroup K of G by turning some of the vector fields into
gauge fields of K while dualizing the remaining vector fields into tensor
fields transforming in a non-trivial representation of K. Surprisingly, we find
that the presence of tensor fields transforming non-trivially under the
Yang-Mills gauge group leads to the introduction of a potential which does not
admit an AdS ground state. Next we give the simultaneous gauging of the U(1)_R
subgroup of SU(2)_R and a subgroup K of G in the presence of K-charged tensor
multiplets. The potential introduced by the simultaneous gauging is the sum of
the potentials introduced by gauging K and U(1)_R separately. We present a list
of possible gauge groups K and the corresponding representations of tensor
fields. For the exceptional supergravity we find that one can gauge the SO^*(6)
subgroup of the isometry group E_{6(-26)} of the scalar manifold if one
dualizes 12 of the vector fields to tensor fields just as in the gauged N=8
supergravity.Comment: Latex file, 23 page
Geometry of The Embedding of Supergravity Scalar Manifolds in D=11 and D=10
Several recent papers have made considerable progress in proving the
existence of remarkable consistent Kaluza-Klein sphere reductions of D=10 and
D=11 supergravities, to give gauged supergravities in lower dimensions. A proof
of the consistency of the full gauged SO(8) reduction on S^7 from D=11 was
given many years ago, but from a practical viewpoint a reduction to a smaller
subset of the fields can be more manageable, for the purposes of lifting
lower-dimensional solutions back to the higher dimension. The major complexity
of the spherical reduction Ansatze comes from the spin-0 fields, and of these,
it is the pseudoscalars that are the most difficult to handle. In this paper we
address this problem in two cases. One arises in a truncation of SO(8) gauged
supergravity in four dimensions to U(1)^4, where there are three pairs of
dilatons and axions in the scalar sector. The other example involves the
truncation of SO(6) gauged supergravity in D=5 to a subsector containing a
scalar and a pseudoscalar field, with a potential that admits a second
supersymmetric vacuum aside from the maximally-supersymmetric one. We briefly
discuss the use of these emdedding Ansatze for the lifting of solutions back to
the higher dimension.Comment: Latex, 24 pages, typos correcte
The hamiltonian study of supersymmetric Yang-Mills quantum mechanics
The hamiltonian formulation of Supersymmetric Yang-Mills quantum mechanics
(SYMQM) is discussed. We focus on the Fock space formulation of the models
since it is convenient for the numerical analysis, however some novel
analytical results are also pointed out.Comment: 3 page
Off-shell N=2 tensor supermultiplets
A multiplet calculus is presented for an arbitrary number n of N=2 tensor
supermultiplets. For rigid supersymmetry the known couplings are reproduced. In
the superconformal case the target spaces parametrized by the scalar fields are
cones over (3n-1)-dimensional spaces encoded in homogeneous SU(2) invariant
potentials, subject to certain constraints. The coupling to conformal
supergravity enables the derivation of a large class of supergravity
Lagrangians with vector and tensor multiplets and hypermultiplets. Dualizing
the tensor fields into scalars leads to hypermultiplets with hyperkahler or
quaternion-Kahler target spaces with at least n abelian isometries. It is
demonstrated how to use the calculus for the construction of Lagrangians
containing higher-derivative couplings of tensor multiplets. For the
application of the c-map between vector and tensor supermultiplets to
Lagrangians with higher-order derivatives, an off-shell version of this map is
proposed. Various other implications of the results are discussed. As an
example an elegant derivation of the classification of 4-dimensional
quaternion-Kahler manifolds with two commuting isometries is given.Comment: 36 page
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