7,414 research outputs found
String Theory and Quark Confinement
This article is based on a talk given at the ``Strings'97'' conference. It
discusses the search for the universality class of confining strings. The key
ingredients include the loop equations, the zigzag symmetry, the non-linear
renormalization group. Some new tests for the equivalence between gauge fields
and strings are proposed.Comment: 13 pages, latex; talk at STRINGS'9
Notes on exotic anti-decuplet of baryons
We emphasize the importance of identifying non-exotic SU(3) partners of the
Theta^+ pentaquark, and indicate possible ways how to do it. We also use the
soliton picture of baryons to relate Reggeon couplings of various baryons.
These relations are used to estimate the Theta^+ production cross section in
high energy processes. We show that the corresponding cross sections are
significantly suppressed relative to the production cross sections of usual
baryons. Finally, we present spin non-flip form factors of the anti-decuplet
baryons in the framework of the chiral quark soliton model.Comment: Contribution to the Workshop On The Physics Of Excited Nucleons
(NSTAR 2004) 24-27 Mar 2004, Grenoble, Franc
Supermagnets and Sigma models
We discuss new methods for non-compact sigma models with and without RR
fluxes. The methods include reduction to one dimensional supermagnets,
supercoset constructions and supertwistors. This work is a first step towards
the solution of these models, which are important in several areas of physics.
I dedicate it to the memory of Volodya Gribov.Comment: 22 page
The wall of the cave
In this article old and new relations between gauge fields and strings are
discussed. We add new arguments that the Yang Mills theories must be described
by the non-critical strings in the five dimensional curved space. The physical
meaning of the fifth dimension is that of the renormalization scale represented
by the Liouville field. We analyze the meaning of the zigzag symmetry and show
that it is likely to be present if there is a minimal supersymmetry on the
world sheet. We also present the new string backgrounds which may be relevant
for the description of the ordinary bosonic Yang-Mills theories. The article is
written on the occasion of the 40-th anniversary of the IHES.Comment: 18 pages, Late
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