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5 papers · 2 filters
Fractal Propagators in QED and QCD and Implications for the Problem of Confinement
S. Gulzari, Y. N. Srivastava, J. Swain +1
We show that QED radiative corrections change the propagator of a charged Dirac particle so that it acquires a fractional anomalous exponent connected with the fine structure const…
Multi-Gluon Scattering in Open Superstring Theory
Stephan Stieberger, Tomasz R. Taylor
We discuss the amplitudes describing N-gluon scattering in type I superstring theory, on a disk world-sheet. After reviewing the general structure of amplitudes and the complicatio…
Mirage Cosmology on Unstable D3-Brane Universe
Anastasios Psinas
We study the geodesic motion of an unstable brane moving in a higher dimensional bulk spacetime. The tachyon which is coupled to a U(1) gauge field induces a non-trivial cosmologic…
Finitely Many Dirac-Delta Interactions on Riemannian Manifolds
Baris Altunkaynak, Fatih Erman, O. Teoman Turgut
This work is intended as an attempt to study the non-perturbative renormalization of bound state problem of finitely many Dirac-delta interactions on Riemannian manifolds, S^2, H^2…
Asymptotic Infrared Fractal Structure of the Propagator for a Charged Fermion
S. Gulzari, J. Swain, A. Widom
It is well known that the long-range nature of the Coulomb interaction makes the definition of asymptotic ``in'' and ``out'' states of charged particles problematic in quantum fiel…