Duality in N=1 Supersymmetric gauge theories and recent developments

We discuss a number of exact results in N=1 supersymmetric field theories. We review the results obtained by Seiberg in Super-Yang-Mills (SYM) theories with matter in fundamental representation. We then consider Kutasov-type SYM theories, which also contain matter in the adjoint representation and an appropriate tree--level superpotential. We finally focus on one particular case in the latter theories, a generalization of the theories with equal number of flavors and colors studied by Seiberg, in which non--trivial superconformal theories appear at certain sections of the quantum--modified moduli space. Throughout the paper we stress the role played by duality in the search for exact results.Comment: 11 pages, to appear in the Proceedings of "HEP-MAD'01: 1st High-Energy Physics Conference In Madagascar", 27 Sep - 5 Oct 2001, Antananarivo, Madagasca

On the muon anomalous magnetic moment in models with a superlight gravitino

We perform a general analysis of the contributions to the muon anomalous magnetic moment in models with a superlight gravitino. We discuss the interpretation and the phenomenological implications of the results. We find that present constraints on the model parameters are comparable and complementary to the ones coming from collider searches and from perturbative unitarity. However, the Brookhaven E821 experiment will probe large unexplored regions of parameter space.Comment: Now 19 A4 pages, 2 figures. Expanded version to be published in JHEP. A section of final comments and other minor comments adde

Sgoldstino events in top decays at LHC

We study top-quark decays in models with light sgoldstinos. The off-diagonal entries in the squark mass matrices can lead to FCNC top two-body decays into sgoldstinos and u(c) quarks. We compute the rates for these decays and discuss the corresponding signatures that could manifest the presence of sgoldstinos in top decays at LHC. We expect that a supersymmetry breaking scale $\sqrt{F}$ up to a scale of order 10 TeV could be probed through this process, for a maximal squark mixing with the third generation. Justified by our preliminary analysis, a thorough study of the corresponding signal versus background and systematics in the LHC environment would be most welcome, in order to accurately assess the potential of this promising process in determining $\sqrt{F}$.Comment: Standard LaTeX, 11 pages, 4 figures, one reference adde

A Multivariate Statistical Approach to Compare Fringe Benefits Between Public and Private Sector Workers

This study relies on multivariate statistical analysis applied to the Health and Retirement Study (1992-2002) to approach the issue of public/private compensation differences. Particularly, principal components are used to uncover the internal structure of relationships among demographic variables, while multiple correspondence  analysis is used to describe and compare wages and fringe benefits between the two sectors. Results indicate the public sector compensates more its workers, not only by offering higher wages but also better non-wage monetary benefits

An investigation of the present concepts of the application of creative teaching to music education and the resulting creative music activities

Thesis (Ed.M.)--Boston Universit

Units in the teaching of Maine folklore.

Thesis (M.A.)--Boston Universit

Density dependence of resonance broadening and shadowing effects in nuclear photoabsorption

Medium effects as a function of the mass number $A$ are studied in the total photonuclear cross section from the $\Delta$-resonance region up to the region where shadowing effects are known to exist. A consistent picture is obtained by simply assuming a density dependence of the different mechanisms of resonance broadening and shadowing. The $\Delta$-mass shift is found to increase with $A$.Comment: 7 pages, LaTeX, 2 figures available from the author