ar X iv : h ep - t h / 97 05 12 6 v 1 1 6 M ay 1 99 7 May 1997 Matrix String Theory As A Generalized Quantum Theory

ar X iv : h ep - t h / 97 05 01 3 v 1 4 M ay 1 99 7 Planckian Energy Scattering of D - branes and M ( atrix ) Theory in Curved Space

We argue that black p-branes will occur in the collision of D0-branes at Planckian energies. This extents the Amati, Ciafaloni and Veneziano and 't Hooft conjecture that black holes occur in the collision of two light particles at Planckian energies. We discuss a possible scenario for such a process by using colliding plane gravitational waves. D-branes in the presence of black holes are discus...

ar X iv : h ep - t h / 97 05 21 6 v 1 2 8 M ay 1 99 7 On Gauge Invariance and Spontaneous Symmetry Breaking ∗

We show how the widely used concept of spontaneous symmetry breaking can be explained in causal perturbation theory by introducing a perturbative version of quantum gauge invariance. Perturbative gauge invariance, formulated exclusively by means of asymp-totic fields, is discussed for the simple example of Abelian U (1) gauge theory (Abelian Higgs model). Our findings are relevant for the elect...

ar X iv : h ep - p h / 97 05 32 1 v 1 1 5 M ay 1 99 7 LECTURE 10 Developing Transport Theory to Study the Chiral Phase Transition

ar X iv : h ep - t h / 97 05 10 2 v 1 1 4 M ay 1 99 7 Loop Correlators and Theta States in 2 D Yang - Mills Theory

Explicit computations of the partition function and correlation functions of Wilson and Polyakov loop operators in theta-sectors of two dimensional Yang-Mills theory on the line cylinder and torus are presented. Several observations about the correspondence of two dimensional Yang-Mills theory with unitary matrix quantum mechanics are presented. The incorporation of the theta-angle which charac...

ar X iv : h ep - t h / 97 05 03 1 v 2 6 M ay 1 99 7 SU - ITP - 97 - 22 5 d Field Theories and M Theory

5-brane configurations describing 5d field theories are promoted to an M theory description à la Witten in terms of polynomials in two complex variables. The coefficients of the polynomials are the Coulomb branch. This picture resolves apparent singularities at vertices and reveals exponentially small corrections. These corrections ask to be compared to world line instanton corrections. From a ...