Poles of scattering matrix
From: Luca Argenti (l.argenti_at_sns.it)
Date: 02/24/05
- Next message: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Previous message: Alejandro: "Re: Lepton predictions and cosmological limits on neutrino mass"
- Messages sorted by: [ date ] [ thread ]
Date: Thu, 24 Feb 2005 22:46:11 +0000 (UTC)
I compute S matrix for my system (electron scattering on atom) at a
number of energy points around a resonance. There the sum $\Delta(E)$
of eigenphases $\delta_j(E)$ experiences a jump of $\pi$ (many
channels might be open). To determine precisely the resonance
position, I could try to fit the determinant of S, which is
e^{2i\Delta(E)}, on the real axis with a Padé formula,
$\frac{P_n(E)}{Q_m(E)}$, and look for complex zeroes of $Q_m(E)$. But
I didn't implement the method yet and ask for suggestions to avoid
pitfalls or use better
techniques.
Thank you in advance
Luca Argenti
- Next message: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Previous message: Alejandro: "Re: Lepton predictions and cosmological limits on neutrino mass"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
|
