Elementary Particle Scattering Lengths and Resonances

Scattering, Inverse Scattering and Resonances in R

Scattering Lengths and Medium and High Energy ππ Scattering

Medium and high energy absorptive parts contribute to dispersive expressions for Dwave scattering lengths, a2 and a 2 2. For the model employed by Basdevant, Frogatt and Peterson we find the Dwave driving term contributions to the Dwave scattering lengths are 1.8 · 10−4 to a2 and 0.4 · 10 −4 to a2, roughly 10% and 30% of their respective central experimental values. Inequivalent sets of sum rul...

Quartet N-d Scattering Lengths

Quartet n-d scattering lengths are calculated using second-generation nucleon-nucleon potential models. These results are compared to the corresponding quantity recently calculated using chiral perturbation theory. 1 Accurate calculations of n-d quartet scattering lengths were first performed 10 years ago[1]. This quantity is known to be insensitive to most physics, such as ℓ > 0 partial waves ...

Theory of Complex Scattering Lengths

We derive a generalized Low equation for the T-matrix appropriate for complex atom-molecule interaction. The properties of this new equation at very low energies are studied and the complex scattering length and effective range are derived.

Scattering lengths of calcium and barium isotopes

We have calculated the s-wave scattering length of all the even isotopes of calcium (Ca) and barium (Ba) in order to investigate the prospect of Bose-Einstein condensation (BEC). For Ca we have used an accurate molecular potential based on detailed spectroscopic data. Our calculations show that Ca does not provide other isotopes alternative to the recently Bose condensed 40Ca that suffers stron...