3,011 research outputs found
d=4+1 gravitating nonabelian solutions with bi-azimuthal symmetry
We construct static, asymptotically flat solutions of SU(2)
Einstein-Yang-Mills theory in 4+1 dimensions, subject to bi-azimuthal symmetry.
Both particle-like and black hole solutions are considered for two different
sets of boundary conditions in the Yang--Mills sector, corresponding to
multisolitons and soliton-antisoliton pairs. For gravitating multi-soliton
solutions, we find that their mass per unit charge is lower than the mass of
the corresponding unit charge, spherically symmetric soliton.Comment: 13 pages, 5 figures; v2: typos corrected, published versio
Solitons and soliton-antisoliton pairs of a Goldstone model in 3+1 dimensions
We study finite energy static solutions to a global symmetry breaking model
in 3+1 dimensions described by an isovector scalar field. The basic features of
two different types of configurations are discussed, one of them corresponding
to axially symmetric multisolitons with topological charge , and the other
one to unstable soliton-antisoliton pairs with zero topological charge.Comment: 13 pages, 5 figure
Non Abelian Chern-Simons-Higgs solutions in (2+1) dimensions
Non Abelian vortices of a SU(2) Chern-Simons--Higgs theory in 2+1 dimensions
are constructed numerically. They represent natural counterparts of the U(1)
solutions considered by Hong, Kim and Pac, and, by Jackiw and Weinberg. The
Abelian embeddings are identified, for all values of the Higgs selfinteraction
strength , resulting in both attractive and repulsive phases. A detailed
analysis of the properties of the solutions reveals the existence ofa number of
unexpected features. For a certain range of the parameter , it is shown
that the non Abelian vortices have lower energy than their topologically stable
Abelian counterparts, resulting in an effective energy lower bound on the SU(2)
configurations. The angular momentum of these vortices is analysed and it is
found that unlike the Abelian ones, whose angular momentum and energy are
unrelated, there is a nontrivial mass--spin relation of the non Abelian
vortices.Comment: 16 pages, 11 figure
Generalized dyons and magnetic dipoles: the issue of angular momentum
It is known that a non-Abelian magnetic monopole cannot rotate globally
(although it may possess a nonzero angular momentum density). At the same time,
the total angular momentum of a magnetic dipole equals the electric charge. In
this work we question the generality of these results by considering a number
of generalizations of the Georgi-Glashow model. We study two different types of
finite energy, regular configurations: solutions with net magnetic charge and
monopole-antimonopole pairs with zero net magnetic charge. These configurations
are endowed with an electric charge and carry also a nonvanishing angular
momentum density. However, we argue that the qualitative results found in the
Georgi-Glashow model are generic and thus a magnetic monopole cannot spin as
long as the matter fields feature the usual "monopole" asymptotic behaviour
independently of the dynamics of the model. A study of the properties of the
dyons and magnetic dipoles in some generalizations of the Georgi-Glashow model
supplemented with higher order Skyrme-like terms in the gauge curvature and
Higgs fields is given quantitatively.Comment: 20 pages, 14 figure
Static BPS 'monopoles' in all even spacetime dimensions
Two families of SO(2n) Higgs models in dimensional spacetime are
presented. One family arises from the {\it dimensional reduction} of higher
dimensional Yang-Mills systems while the construction of the other one is {\it
ad hoc}, the member of each family coinciding with the usual SU(2)
Yang-Mills--Higgs system without Higgs potential. All models support BPS
'monopole' solutions. The 'dyons' of the {\it dimensionally descended} models
are also BPS, while the electrically charged solutions of the {\it ad hoc}
models are not BPS.Comment: 15 pages, 3 figure
SQCD Vacua and Geometrical Engineering
We consider the geometrical engineering constructions for the N = 1 SQCD
vacua recently proposed by Giveon and Kutasov. After one T-duality, the
geometries with wrapped D5 branes become N = 1 brane configurations with NS
branes and D4 branes. The field theories encoded by the geometries contain
extra massive adjoint fields for the flavor group. After performing a flop, the
geometries contain branes, antibranes and branes wrapped on non-holomorphic
cycles. The various tachyon condensations between pairs of wrapped D5 branes
and anti D5 branes together with deformations of the cycles give rise to a
variety of supersymmetric and metastable non-supersymmetric vacua.Comment: 21 Pages, Latex, 8 Figure
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