PARTICLES AS S|MATRIX POLES

Scattering equations: real solutions and particles on a line

On these regions, the scattering equations are equivalent to the problem of finding stationary points of n − 3 mutually repelling particles on a ...

Towards S-matrix theory of unstable particles

Its existence is only seen as resonance in physical process. → Complex pole! Unitarity ⇒ The residue is factorized. See e.g. The analytic S- ...

Progress in three-particle scattering from LQCD

Poles in the K-matrix generate additional finite-volume effects that we did not incorporate. In Ref. [17] we found that, in a periodic finite volume, the three- ...

STRONG INTERACTION THEORY WITHOUT ELEMENTARY ...

The object of the game is to deduce the existence of single particle states (Regge poles) that have the quantum numbers of the original multiparticle ...

Stable, unstable, and virtual particles - Arnold Neumaier

... particles on the second sheet of the analytic continuation, having a well-defined but purely inmaginary energy, defined as a pole of the S-matrix. See, e.g. ...

Resonance Signatures in + − Scattering: Theoretical Analysis and ...

Scattering matrix poles reveal system states and provide insights into bound states and resonances. Unstable particle poles relocate to the Second Riemann ...

Is the charged particles from the sun more harmful at earth's poles?

The magnetic fields direct the particles towards the poles does that mean that life there has less protection from the magnetosphere and thus it is more ...

Microwave and submillimeter wave scattering of oriented ice particles

of totally randomly oriented particles depends only on the scattering angle Θ, the scattering matrix ... matrix, the polarization at the poles, which are in the ...

volume 168, number

and outgoing states may consist of bound compounds as well as single particles. The momenta of the particles and compounds are not changed in the scattering ...

Note Exact Two-Particle S-Matrix of Quantum Sine-Gordon Solitons

The exact ana explicit formulas for the quantum S-matrix elements of ... there are poles corresponding to soliton-antisoliton bound states. There are ...

Computing the T-matrix of a scattering object with multiple plane ...

Here, we present a method to calculate the T-matrix of an arbitrarily complex particle. Our approach only requires the object to be illuminated in a sequence of ...

Observing S-Matrix Pole Flow in Resonance Interplay

2c). This barrier can introduce a quasi-bound state above threshold (dashed orange line). An incoming particle matching the energy of the quasi- ...

C.N. Yang Institute for Theoretical Physics

We shall note that the S matrix (13)-(15) has no poles on the physical sheet. ... Let us calculate now the scattering matrix of two neutral particles (44).

Matthew Schwartz | What is the S-matrix? - YouTube

Unfortunately, the traditional definition of the S matrix is only valid for theories in which all particles are massive. With massless particles ...

physical review - CORE

DECAY OF UNSTABLE PARTICLES IN S-MATRIX THEORY B 1473. (rather than the ... hand, poles of S, in the lower half k plane, say at. K-iy, y>0, are evidently ...

Are virtual particles real or just math filler - Physics Forums

In QFT, observable (hence real) particles of mass m'>m m are conventionally defined as being associated with poles of the S-matrix at energy E= ...

S-Matrix

ΣΤ continman. A. 4m² single particle isolated pole i. (2). Go (p). p² M²+1E. 2. A branch cut. Page 13. 1PI expression for G(2). → perturbative expansion for.

Four-Particle Scattering in Nonrelativistic Theory. II - CiteSeerX

into account the contributions of bound states and/ or resonance poles ; an example is the equation of composite-composite particle scattering, which is also ...

Speed-up and slow-down of a quantum particle | Scientific Reports

The poles of the first kind continue their upward motion along the imaginary axis, and for s > M , M = 0 , 1 , 2 , . . . , M + 1 of them lie on ...

PARTICLES AND THE S-MATRIX IN QUANTUM FIELD THEORY

In Sec. 2 such pole terms are obtained for the two-particle matrix element ( 21 A ( x) 12). If each particle is ...

Exotic hadron

Exotic hadrons are subatomic particles composed of quarks and gluons, but which – unlike "well-known" hadrons such as protons, neutrons and mesons – consist of more than three valence quarks.