Showing 1993Show all

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hep-th1993★ 11 cited

Particle-Field Duality and Form Factors from Vertex Operators

Costas Efthimiou, Andre LeClair

Using a duality between the space of particles and the space of fields, we show how one can compute form factors directly in the space of fields. This introduces the notion of vert…

hep-th1993★ 6 cited

Tree scattering amplitudes of the spin-4/3 fractional superstring II: the twisted sectors

Philip C. Argyres, S. -H. Henry Tye

The spin-4/3 fractional superstring is characterized by a world-sheet chiral algebra involving spin-4/3 currents. The discussion of the tree-level scattering amplitudes of this the…

astro-ph1993

Convergence properties of finite-difference hydrodynamics schemes in the presence of shocks

Paul A. Kimoto, David F. Chernoff

We investigate asymptotic convergence in the~ limit as a tool for determining whether numerical computations involving shocks are accurate. We use one-dimensi…

hep-th1993★ 30 cited

Einstein-Yang-Mills Theory with a Massive Dilaton and Axion: String-Inspired Regular and Black Hole Solutions

Christopher M. O'Neill

We study the classical theory of a non-Abelian gauge field (gauge group ) coupled to a massive dilaton, massive axion and Einstein gravity. The theory is inspired by the bos…

cond-mat1993★ 28 cited

The Bose--Hubbard Model and Superfluid Staircases in He Films

G. T. Zimanyi, P. A. Crowell, R. T. Scalettar +1

The recent experimental observation of step-like structure in the superfluid density of He films on graphite is interpreted in terms of passage close to Mott insulating lobes…

hep-th1993★ 8 cited

Kac and New Determinants for Fractional Superconformal Algebras

Zurab Kakushadze, S. -H. Henry Tye

We derive the Kac and new determinant formulae for an arbitrary (integer) level fractional superconformal algebra using the BRST cohomology techniques developed in conformal fi…

cond-mat1993★ 75 cited

Hysteresis Loop Critical Exponents in 6-Epsilon Dimensions

Karin Dahmen, James P. Sethna

The hysteresis loop in the zero-temperature random-field Ising model exhibits a critical point as the width of the disorder increases. Above six dimensions, the critical exponents…

hep-th1993★ 249 cited

Calabi-Yau Moduli Space, Mirror Manifolds and Spacetime Topology Change in String Theory

P. S. Aspinwall, B. R. Greene, D. R. Morrison

We analyze the moduli spaces of Calabi-Yau threefolds and their associated conformally invariant nonlinear sigma-models and show that they are described by an unexpectedly rich geo…

hep-ph1993★ 45 cited

Order m alpha^8 Contributions to the Decay Rate of Orthopositronium

P. Labelle, G. P. Lepage, U. Magnea

We discuss how contributions to the order orthopositronium decay rate can be separated into two categories, one due to relativistic momenta and calculable in ter…

hep-ph1993★ 35 cited

Radiatively-Induced First-Order Phase Transitions: The Necessity of the Renormalization Group

Mark Alford, John March-Russell

We advocate a (Wilson) renormalization-group (RG) treatment of finite-temperature first-order phase transitions, in particular those driven by radiative corrections such as occur i…

hep-ph1993★ 27 cited

Corrections to Chiral Dynamics of Heavy Hadrons: (I) 1/M Correction

H. Y. Cheng, C. Y. Cheung, G. L. Lin +3

In earlier publications we have analyzed the strong and radiative decays of heavy hadrons in a formalism which incorporates both heavy-quark and chiral symmetries. In particular, w…

astro-ph1993★ 80 cited

Sharp Hi Edges in the Outskirts of Disk Galaxies

Edvige Corbelli, Edwin E. Salpeter

Observations indicate that some extended outer disks have a sharp cut off in the surface density of neutral hydrogen when this approaches the value of cm$^{-…

astro-ph1993★ 12 cited

Hi Spin Temperatures and Heating Requirements in Outer Regions of Disk Galaxies

Edvige Corbelli, Edwin E. Salpeter

ABSRACT:We show how to use 21-cm emission and absorption studies to estimate the heat inputs to the neutral gas in low pressure environments, such as in outer disks of spiral galax…

hep-th1993★ 13 cited

Central Charge Reduction and Spacetime Statistics in the Fractional Superstring

Philip C. Argyres, Keith R. Dienes

Fractional superstrings in the tensor-product formulation experience ``internal projections'' which reduce their effective central charges. Simple expressions for the characters of…

hep-th1993

Separation of Variables and Exactly Soluble Time-Dependent Potentials in Quantum Mechanics

Costas John Efthimiou, Donald Spector

We use separation of variables as a tool to identify and to analyze exactly soluble time-dependent quantum mechanical potentials. By considering the most general possible time-depe…

alg-geom1993

Finding Sparse Systems of Parameters

David Eisenbud, Bernd Sturmfels

For several computational procedures such as finding radicals and Noether normalizations, it is important to choose as sparse as possible a system of parameters in a polynomial ide…

hep-th1993★ 54 cited

Structure of Topological Lattice Field Theories in Three Dimensions

Stephen-wei Chung, Masafumi Fukuma, Alfred Shapere

We construct and classify topological lattice field theories in three dimensions. After defining a general class of local lattice field theories, we impose invariance under arbitra…

hep-th1993★ 22 cited

Spectrum Generating Affine Lie Algebras in Massive Field Theory

Andre LeClair

We present a new application of affine Lie algebras to massive quantum field theory in 2 dimensions, by investigating the limit of the q-deformed affine symm…

hep-ph1993★ 23 cited

Heavy Quark and Chiral Symmetry Predictions for Semileptonic Decays B->D(D*),pi,l,nu

H-Y Cheng, C-Y Cheung, W. Dimm +4

We study in detail the prediction for the semileptonic decays by heavy quark and chiral symmetry. The branching ratio for $\bar{B} \to D π\ell \ba…

chao-dyn1993

Dynamical Systems: Some Computational Problems

John Guckenheimer, Patrick Worfolk

We present several topics involving the computation of dynamical systems. The emphasis is on work in progress and the presentation is informal -- there are many technical details w…

cond-mat1993★ 19 cited

Real-space renormalization group for the random-field Ising model

M. E. J. Newman, B. W. Roberts, G. T. Barkema +1

We present real--space renormalization group (RG) calculations of the critical properties of the random--field Ising model on a cubic lattice in three dimensions. We calculate the…

chao-dyn1993

A Dynamical Simulation Facility for Hybrid Systems

Allen Back, John Guckenheimer, Mark Myers

This paper establishes a general framework for describing hybrid dynamical systems which is particularly suitable for numerical simulation. In this context, the data structures use…

hep-th1993★ 3 cited

A Comment on the Propagator of the Radial Oscillator

C. J. Efthimiou

Using a hybrid approach, based on the recursion relations for shape invariant potentials developed by Das and Huang and a time-dependent tranformation of variables, we derive the p…

gr-qc1993★ 141 cited

Gravitational Radiation, Inspiraling Binaries, and Cosmology

David F. Chernoff, Lee Samuel Finn

We show how to measure cosmological parameters using observations of inspiraling binary neutron star or black hole systems in one or more gravitational wave detectors. To illustrat…