scholarly journals Asymptotic behavior of scattering amplitudes in semi-classical and low energy limits

1989 ◽  
Vol 39 (1) ◽  
pp. 155-192 ◽  
Author(s):  
Didier Robert ◽  
H. Tamura
Keyword(s):  
Asymptotic Behavior ◽  
Scattering Amplitudes ◽  
Low Energy

scholarly journals Spurious poles in the scattering of electric and magnetic charges

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
John Terning ◽  
Christopher B. Verhaaren
Keyword(s):  
Perturbation Theory ◽  
Scattering Amplitudes ◽  
Pair Production ◽  
Magnetic Particles ◽  
Single Photon ◽  
Low Energy ◽  
Magnetic Interactions ◽  
Parity Conservation ◽  
Non Local ◽  
The Way

Abstract Theories with both electric and magnetic charges (“mutually non-local” theories) have several major obstacles to calculating scattering amplitudes. Even when the interaction arises through the kinetic mixing of two, otherwise independent, U(1)’s, so that all low-energy interactions are perturbative, difficulties remain: using a self-dual, local formalism leads to spurious poles at any finite order in perturbation theory. Correct calculations must show how the spurious poles cancel in observable scattering amplitudes. Consistency requires that one type of charge is confined as a result of one of the U(1)’s being broken. Here we show how the constraints of confinement and parity conservation on observable processes manages to cancel the spurious poles in scattering and pair production amplitudes, paving the way for systematic studies of the experimental signatures of “dark” electric-magnetic processes. Along the way we demonstrate some novel effects in electric-magnetic interactions, including that the amplitude for single photon production of magnetic particles by electric particles vanishes.

PROCEDURE FOR GENERATING EQUATIONS IN LINEAR SIGMA MODEL

2011 ◽  
Vol 26 (14) ◽  
pp. 2327-2352 ◽  
Author(s):  
AMIR H. FARIBORZ
Keyword(s):  
Scattering Amplitudes ◽  
Sigma Model ◽  
Point Interaction ◽  
Low Energy ◽  
Linear Sigma Model ◽  
Pseudoscalar Mesons ◽  
Decay Widths ◽  
Symmetry Breaking Term ◽  
The Masses ◽  
Breaking Term

A procedure for implementation of the generating equations in the linear sigma model of low energy QCD is presented. For any explicit symmetry breaking term, this procedure computes the masses of scalar and pseudoscalar mesons as well as various three-point and four-point interaction vertices that are needed in calculation of different decay widths and scattering amplitudes.

On the low-energy πN scattering amplitudes

1974 ◽  
Vol 52 (2) ◽  
pp. 213-216 ◽  
Author(s):  
L.M. Nath ◽  
A.Q. Sarker
Keyword(s):  
Scattering Amplitudes ◽  
Low Energy

Determination of complex scattering amplitudes in low-energy elastic electron-sodium scattering

1992 ◽  
Vol 46 (9) ◽  
pp. 6079-6082 ◽  
Author(s):  
J. J. McClelland ◽  
S. R. Lorentz ◽  
R. E. Scholten ◽  
M. H. Kelley ◽  
R. J. Celotta
Keyword(s):  
Scattering Amplitudes ◽  
Low Energy ◽  
Elastic Electron

scholarly journals Polarization in low energy kaon–hyperon interaction

2020 ◽  
Vol 29 (03) ◽  
pp. 2050013 ◽  
Author(s):  
M. G. L. Nogueira-Santos ◽  
C. C. Barros
Keyword(s):  
Scattering Amplitudes ◽  
Chiral Lagrangians ◽  
Low Energy ◽  
Angular Distributions

In this paper, we study the low energy kaon–hyperon interaction considering effective chiral Lagrangians that include kaons, [Formula: see text] mesons, hyperons and the corresponding resonances. The scattering amplitudes are calculated and then we determine the angular distributions and polarizations.

scholarly journals PERTURBATIVE DYNAMICS OF FRACTIONAL STRINGS ON MULTIPLY WOUND D-STRINGS

1998 ◽  
Vol 13 (06) ◽  
pp. 903-914 ◽  
Author(s):  
AKIKAZU HASHIMOTO
Keyword(s):  
Scattering Amplitudes ◽  
Boundary Conditions ◽  
Bound State ◽  
Low Energy ◽  
Effective Theory ◽  
World Sheet ◽  
Open Strings ◽  
Twisted Boundary Conditions

Fractional strings in the spectrum of states of open strings attached to a multiply wound D-brane is explained. We first describe the fractional string states in the low energy effective theory where the topology of multiple winding is encoded in the gauge holonomy. The holonomy induces twisted boundary conditions responsible for the fractional moding of these states. We also describe fractional strings in world sheet formulation and compute simple scattering amplitudes for Hawking emission/absorption. Generalization to fractional DN-strings in a one-brane five-brane bound state is described. When a one-brane and a five-brane wraps Q1 and Q5 times respectively around a circle, the momentum of DN-strings is quantized in units of 2π/LQ1Q5. These fractional states appear naturally in the perturbative spectrum of the theory.

scholarly journals PROBING THE FROISSART BOUND FOR MODELS WITH CHARGED VECTOR FIELDS IN D=3

1994 ◽  
Vol 09 (18) ◽  
pp. 1695-1700 ◽  
Author(s):  
O.M. DEL CIMA
Keyword(s):  
Asymptotic Behavior ◽  
Scattering Amplitudes ◽  
Gauge Field ◽  
Vector Fields ◽  
Three Dimensional ◽  
Tree Level ◽  
Abelian Gauge ◽  
Gauge Invariant ◽  
Maxwell Fields ◽  
Chern Simons

One discusses the tree-level unitarity and presents asymptotic behavior of scattering amplitudes for three-dimensional gauge-invariant models where complex Chern- Simons-Maxwell fields (with and without a Proca-like mass) are coupled to an Abelian gauge field.

scholarly journals The pole structure of the unitary, crossing symmetric low energy ππ scattering amplitudes

2005 ◽  
Vol 2005 (02) ◽  
pp. 043-043 ◽  
Author(s):  
Z. Y Zhou ◽  
G. Y Qin ◽  
P Zhang ◽  
Z. G Xiao ◽  
H. Q Zheng ◽  
...  
Keyword(s):  
Scattering Amplitudes ◽  
Low Energy ◽  
Pole Structure
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