A. E. Kudryavtsev

Towards a field theoretic understanding of NN → NNπ

Abstract.We study the production amplitude for the reaction NN → NNπ up to next-to-leading order in chiral perturbation theory using a counting scheme that takes into account the large scale introduced by the initial momentum. In particular, we investigate a subtlety that arises once the leading loop contributions are convoluted with the NN wave functions as demanded by the non-perturbative nature of the NN interaction. We show how to properly identify the irreducible contribution of loop diagrams in such type of reaction. The net effect of the inclusion of all next-to-leading-order loops is to enhance the leading rescattering amplitude by a factor of 4/3, bringing its contribution to the cross-section for pp → dπ+ close to the experimental value.

p -wave pion production from nucleon-nucleon collisions

We investigate

Three-body Ddquer pion dynamics for the X(3872)

p

The multiple-scattering series in pion-deuteron scattering and the nucleon-nucleon potential: perspectives from effective field theory

-wave pion production in nucleon-nucleon collisions up to next-to-next-to-leading order in chiral effective field theory. In particular, we show that it is possible to describe simultaneously the

Precision calculation of

p

\gamma d\to \pi^+ nn

-wave amplitudes in the

within chiral perturbation theory

\mathit{pn}\ensuremath{\rightarrow}\mathit{pp}{\ensuremath{\pi}}^{\ensuremath{-}}

On the extraction of cross sections for π0 and η photoproduction off neutrons from deuteron data

,

On rescattering effects in the reaction π−d → π−d

\mathit{pp}\ensuremath{\rightarrow}\mathit{pn}{\ensuremath{\pi}}^{+}

Angular asymmetries in the reactions \(\vec pp \to d\pi ^ + \eta \) and \(\vec pn \to d\pi ^0 \eta \) and a0-f0 mixing

,