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19 papers · 1 filter
Stability Analysis of Sum Rules for Compton Scattering
Claudio Coriano', Hsiang-nan Li
We perform a stability analysis of a recently proposed sum rule for pion Compton scattering at fixed angle and moderate Mandelstam invariants. The sum rule is found to be sensitive…
On a New Method for Computing Trace Anomalies
Fiorenzo Bastianelli
I describe a new method for computing trace anomalies in quantum field theories which makes use of path-integrals for particles moving in curved spaces. After presenting the main i…
On Spectral Laws of 2D--Turbulence in Shell Models
Peter Frick, Erik Aurell
We consider a class of shell models of 2D-turbulence. They conserve inertially the analogues of energy and enstrophy, two quadratic forms in the shell amplitudes. Inertially conser…
Classical and Quantized Tensionless Strings
J. Isberg, U. Lindström, B. Sundborg +1
{}From the ordinary tensile string we derive a geometric action for the tensionless () string and discuss its symmetries and field equations. The Weyl symmetry of the usual st…
Self-Preservation of Large-Scale Structures in Burgers' Turbulence
Erik Aurell, Sergey N. Gurbatov, Igor I. Wertgeim
We investigate the stability of large-scale structures in Burgers' equation under the perturbation of high wave-number noise in the initial conditions. Analytical estimates are obt…
The statistics transmuting Chern-Simons field and the braid group on Riemann surfaces of genus g>0
Ansar Fayyazuddin
We study bosons interacting with an abelian Chern-Simons field on Riemann surfaces of genus . It is shown that a singular gauge transformation brings the hamiltonian to free f…