The Confining N=1 Supersymmetric Gauge Theories: a Review

We give a classification and overview of the confining N=1 supersymmetric gauge theories. For simplicity we consider only theories based on simple gauge groups and no tree-level superpotential. Classification of these theories can be done according to whether or not there is a superpotential generated for the confined degrees of freedom. The theories with the superpotential include s-confining theories and also theories where the gauge fields participate in the confining spectrum, while theories with no superpotential include theories with a quantum deformed moduli space and theories with an affine moduli space.Comment: 12 pages, LaTeX. Talk presented at the 3rd Workshop on Continuous Advances in QCD, Minneapolis, MN, 16-19 April 1998. To appear in the proceeding

Transformation of agriculture in central Eastern Europe and the former USSR : major policy issues and perspectives

The author surveys agricultural reform to date, identifies key policy issues, and outlines potential scenarios for the transformation of agriculture in Bulgaria, Czechoslovakia, the former German Democratic Republic (GDR), Hungary, Poland, Romania, and to a lesser extent - the former USSR. After years of socialism, these countries'agricultural sectors are characterized by large, inefficient farms with high production costs; heavier food consumption than in market economies of comparable prosperity, and excess demand for food, at subsidized food prices. Central Eastern Europe is beginning to create a new agricultural structure based on private ownership, real cooperatives, and a market economy. The former USSR is also striving to overcome serious economic difficulty with comprehensive economic and political reform. To develop a market-oriented, competitive agricultural structure, these countries need to : a) create marketable landed property; b) change agriculture's structure to emphasize medium size private agricultural ventures and cooperatives; c) create an environment supportive of private ventures; d) create an agricultural market that encourages fair competition; e) develop a policy emphasizing efficient production; and f) support environmentally sustainable agricultural production technologies.Agricultural Knowledge&Information Systems,Environmental Economics&Policies,Economic Theory&Research,Crops&Crop Management Systems,Agribusiness&Markets

Dynamical Supersymmetry Breaking versus Run-away behavior in Supersymmetric Gauge Theories

We consider Dynamical Supersymmetry Breaking (DSB) in models with classical flat directions. We analyze a number of examples, and develop a systematic approach to determine if classical flat directions are stabilized in the full quantum theory, or lead to run-away behavior. In some cases pseudo-flat directions remain even at the quantum level before taking into account corrections to the K\"ahler potential. We show that in certain limits these corrections are calculable. In particular, we find that in the Intriligator-Thomas $SU(2)$ and its generalizations, a potential for moduli is generated. Moreover, there is a region of the parameter space where K\"ahler potential corrections lead to calculable (local) minima at large but finite distance from the origin.Comment: 13 pages, uses harvmac; discussion of run-away behavior in $SU(N-M) \times SU(N)$ model is clarifie

Duality in Sp and SO Gauge Groups from M Theory

We describe fivebrane configurations in M theory whose 4-d spacetime contains N=1 supersymmetric Sp or SO gauge fields and fundamentals of these groups. We show how field-theory dualities for Sp and SO groups can be derived using these fivebrane configurations in M theory.Comment: 12 pages, LaTeX, four embedded figure

't Hooft Anomaly Matching for Discrete Symmetries

We show how to extend the 't Hooft anomaly matching conditions to discrete symmetries. We check these discrete anomaly matching conditions on several proposed low-energy spectra of certain strongly interacting gauge theories. The excluded examples include the proposed chirally symmetric vacuum of pure N=1 supersymmetric Yang-Mills theories, certain non-supersymmetric confining theories and some self-dual N=1 supersymmetric theories based on exceptional groups.Comment: 6 pages, LaTeX. Talk presented by Csaba Csaki at the XXXIIIrd Rencontres de Moriond, Electroweak Interactions and Unified Theories, Les Arcs, Savoie, France, March 14-21, 199

Glueball Mass Spectrum from Supergravity

We review the calculation of the spectrum of glueball masses in non-supersymmetric Yang-Mills theory using the conjectured duality between supergravity and large N gauge theories. The glueball masses are obtained by solving the supergravity wave equations in a black hole geometry. The glueball masses found this way are in unexpected agreement with the available lattice data. We also show how to use a modified version of the duality based on rotating branes to calculate the glueball mass spectrum with some of the Kaluza-Klein states of the supergravity theory decoupled from the spectrum.Comment: 7 pages, RevTeX. Based on two talks presented at DPF '99, UCLA, Los Angeles, CA, 5-9 January, 199