59,937 research outputs found
Three Dimensional Bosonization From Supersymmetry
Three dimensional bosonization is a conjectured duality between
non-supersymmetric Chern-Simons theories coupled to matter fields in the
fundamental representation of the gauge group. There is a well-established
supersymmetric version of this duality, which involves Chern-Simons theories
with supersymmetry coupled to fundamental chiral multiplets.
Assuming that the supersymmetric duality is valid, we prove that
non-supersymmetric bosonization holds for all planar correlators of
single-trace operators. The main tool we employ is a double-trace flow from the
supersymmetric theory to an IR fixed point, in which the scalars and fermions
are effectively decoupled in the planar limit. A generalization of this
technique can be used to derive the duality mapping of all renormalizable
couplings, in non-supersymmetric theories with both a scalar and a fermion. Our
results do not rely on an explicit computation of planar diagrams.Comment: 39 pages, 3 figures. v2: added reference
Recent Efforts in the Computation of String Couplings:
We review recent advances towards the computation of string couplings.
Duality symmetry, mirror symmetry, Picard-Fuchs equations, etc. are some of the
tools.Comment: Talk hold at the `International Conference on Modern Problems in
Quantum Field Theorie, Strings and Quantum Gravity', Kiev, June 1992, 18
page
Enumerative geometry of stable maps with Lagrangian boundary conditions and multiple covers of the disc
In this paper, we present foundational material towards the development of a
rigorous enumerative theory of stable maps with Lagrangian boundary conditions,
ie stable maps from bordered Riemann surfaces to a symplectic manifold, such
that the boundary maps to a Lagrangian submanifold. Our main application is to
a situation where our proposed theory leads to a well-defined algebro-geometric
computation very similar to well-known localization techniques in Gromov-Witten
theory. In particular, our computation of the invariants for multiple covers of
a generic disc bounding a special Lagrangian submanifold in a Calabi-Yau
threefold agrees completely with the original predictions of Ooguri and Vafa
based on string duality. Our proposed invariants depend more generally on a
discrete parameter which came to light in the work of Aganagic, Klemm, and Vafa
which was also based on duality, and our more general calculations agree with
theirs up to sign.Comment: This is the version published by Geometry & Topology Monographs on 22
April 200
On Vanishing Two Loop Cosmological Constants in Nonsupersymmetric Strings
It has recently been suggested that in certain special nonsupersymmetric type
II string compactifications, at least the first two perturbative contributions
to the cosmological constant vanish. Support for perturbative
vanishing beyond 1-loop (as well as evidence for the absence of some
nonperturbative contributions) has come from duality arguments. There was also
a direct 2-loop computation which was incomplete; in this note we explain the
deficiency of the previous 2-loop calculation and discuss the complete 2-loop
computation in two different models. The corrected analysis yields a vanishing
2-loop contribution to in these models.Comment: 16 pages, harvmac bi
Gluon-Meson Duality in the Mean Field Approximation
In a gauge-fixed language gluon-meson duality can be described as the Higgs
mechanism for ``spontaneous symmetry breaking'' of color. We present a mean
field computation which suggests that this phenomenon is plausible in QCD. One
obtains realistic masses of the light mesons and baryons.Comment: 12 pages,adaptation of numerical results to hep-ph/000815
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