Ground State Structure of a Coupled 2-Fermion System in Supersymmetric Quantum Mechanics

We prove the uniqueness of the ground state for a supersymmetric quantum mechanical system of two fermions and two bosons, which is closely related to the N=1 WZ-model. The proof is constructive and gives detailed information on what the ground state looks like.Comment: 8 pages, LaTe

Quark and Gluon Orbital Angular Momentum and Spin in Hard Processes

We suggest a method of constructing gauge invariant quark and gluon distributions that describe an abstract QCD observable and apply this method to analyze angular momentum of a hadron. In addition to the known quark and gluon polarized structure functions, we obtain gauge invariant distributions for quark and gluon orbital angular momenta, and consider some basic properties of these distributions and their moments.Comment: 16 pages, no figures, RevTe

A study of the need for a Jewish Community Center of Greater Lynn extension group work program in the Swampscott-Marblehead area for children six to fourteen years old.

Thesis (M.S.)--Boston Universit

Practical Modeling of Large-Scale Galactic Magnetic Fields: Status and Prospects

This is a review of the status of efforts to model the large-scale Galactic magnetic field (GMF). Though important for a variety of astrophysical processes, the GMF remains poorly understood despite some interesting new tracers being used in the field. Though we still have too many models that might fit the data, this is not to say that the field has not developed in the last few years. In particular, surveys of polarized dust have given us a new observable that is complementary to the more traditional radio tracers, and a variety of other new tracers and related measurements are becoming available to improve current modeling. This paper reviews: the tracers available; the models that have been studied; what has been learned so far; what the caveats and outstanding issues are; and one opinion of where the most promising future avenues of exploration lie.Comment: Published in Galaxies special issue "New Perspectives on Galactic Magnetism" (with minor formatting differences). v2 fixes some reference

On the QCD Evolution of the Transversity Distribution

The QCD evolution of the transversity distributions is investigated and compared to that of the helicity distributions. It is shown that they differ largely in the small-$x$ region. It is also proved that the evolution preserves Soffer's inequality among the three leading-twist distribution functions.Comment: 9 pages, 1 figur