110 research outputs found
GMSB at a stable vacuum and MSSM without exotics from heterotic string
We show that it is possible to introduce the confining hidden sector gauge
group SU(5)' with the chiral matter 10 plus 5-bar, which are neutral under the
standard model gauge group, toward a gauge mediated supersymmetry breaking
(GMSB) in a Z_{12-I} orbifold compactification of E_8xE_8 heterotic string.
Three families of MSSM result without exotics. We also find a desirable matter
parity P (or R-parity) assignment. We note that this model contains the
spectrum of the Lee-Weinberg model which has a nice solution of the mu problem.Comment: 17 pages, references and DOI adde
N=2 Moduli Spaces and N=1 Dualities for SO(n_c) and USp(2n_c) SuperQCD
We determine the exact global structure of the moduli space of
supersymmetric and \USp(2n) gauge theories with matter
hypermultiplets in the fundamental representations, using the
non-renormalization theorem for the Higgs branches and the exact solutions for
the Coulomb branches. By adding an --breaking mass term for the
adjoint chiral field and varying the mass, the theories can be made to
flow to either an ``electric'' supersymmetric QCD or its dual
``magnetic'' version. We thus obtain a derivation of the dualities of
Seiberg.Comment: 20 pages, harvmac (b
Seiberg duality in three dimensions
We analyze three dimensional gauge theories with gauge group. We find
that in some regime the theory should be described in terms of a dual theory,
very much in the spirit of Seiberg duality in four dimensions. This duality
does not coincide with mirror symmetry.Comment: 8 pages, LaTeX2e, using utarticle.cls (included
On mixed phases in gauge theories
In many gauge theories at different values of parameters entering Lagrangian,
the vacuum is dominated by coherent condensates of different mutually non-local
fields (for instance, by condensates of electric or magnetic charges, or by
various dyons). It is argued that the transition between these "dual to each
other" phases proceeds through the intermediate "mixed phase", having
qualitatively different features. The examples considered include: ordinary YM,
N=1 SYM, N=1 SQCD, and broken N=2 SYM and SQCD.Comment: Latex, 19 pages; Talk given at "Continuous Advances in
QCD-2002/Arkadyfest", honoring the 60-th birthday of Arkady Vainshtein; 17-23
May 2002, University of Minneapolis, Minnesota, USA; v.3: the extended and
improved versio
Chiral anomalies in higher-derivative supersymmetric 6D gauge theories
We show that the recently constructed higher-derivative 6D SYM theory
involves an internal chiral anomaly breaking gauge invariance. The anomaly is
cancelled when adding to the theory an adjoint matter hypermultiplet.Comment: A missed contribution added. The article is rather essentially
reshuffle
A Generalized Construction of Mirror Manifolds
We generalize the known method for explicit construction of mirror pairs of
-superconformal field theories, using the formalism of Landau-Ginzburg
orbifolds. Geometrically, these theories are realized as Calabi-Yau
hypersurfaces in weighted projective spaces. This generalization makes it
possible to construct the mirror partners of many manifolds for which the
mirror was not previously known.Comment: 16 page
Landau-Ginzburg Orbifolds, Mirror Symmetry and the Elliptic Genus
We compute the elliptic genus for arbitrary two dimensional
Landau-Ginzburg orbifolds. This is used to search for possible mirror pairs of
such models. We show that if two Landau-Ginzburg models are conjugate to each
other in a certain sense, then to every orbifold of the first theory
corresponds an orbifold of the second theory with the same elliptic genus (up
to a sign) and with the roles of the chiral and anti-chiral rings interchanged.
These orbifolds thus constitute a possible mirror pair. Furthermore, new pairs
of conjugate models may be obtained by taking the product of old ones. We also
give a sufficient (and possibly necessary) condition for two models to be
conjugate, and show that it is satisfied by the mirror pairs proposed by one of
the authors and~H\"ubsch.Comment: p.22, IASSNS-HEP-93/92, use harvma
N=2 Electric-magnetic duality in a chiral background
We establish the consistency of duality transformations for generic systems
of vector supermultiplets in the presence of a chiral background field.
This is relevant, for instance, when dealing with spurion fields or when
considering higher-derivative couplings of vector multiplets to supergravity.
We point out that under duality most quantities do not transform as functions.
With few exceptions, true functions are nonholomorphic, even though the duality
transformations themselves are holomorphic in nature.Comment: LaTeX using espcrc2, 11 pp. To appear in proc. of the 29-th Int.
Symp. Ahrenshoop, Bucko
Pursuing Gravitational S-Duality
Recently a strong-weak coupling duality in non-abelian non-supersymmetric
theories in four dimensions has been found. An analogous procedure is reviewed,
which allows to find the `dual action' to the gauge theory of dynamical gravity
constructed by the MacDowell-Mansouri model plus the superposition of a
term.Comment: Invited paper to appear in the special issue of the `Journal of
Chaos, Solitons and Fractals' on: "Superstrings, M,F,S,... Theory" (M.S. El
Naschie and C. Castro, editors), 19 pages, LaTeX file, no figure
Fusion Algebras of Fermionic Rational Conformal Field Theories via a Generalized Verlinde Formula
We prove a generalization of the Verlinde formula to fermionic rational
conformal field theories. The fusion coefficients of the fermionic theory are
equal to sums of fusion coefficients of its bosonic projection. In particular,
fusion coefficients of the fermionic theory connecting two conjugate Ramond
fields with the identity are either one or two. Therefore, one is forced to
weaken the axioms of fusion algebras for fermionic theories. We show that in
the special case of fermionic W(2,d)-algebras these coefficients are given by
the dimensions of the irreducible representations of the horizontal subalgebra
on the highest weight. As concrete examples we discuss fusion algebras of
rational models of fermionic W(2,d)-algebras including minimal models of the
super Virasoro algebra as well as super W-algebras SW(3/2,d).Comment: 28 pages (Plain TeX), BONN-HE-93-0
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