On the Interpretation of $\pi N \to \pi \pi N$ Data near Threshold

M. G. Olsson; Ulf-G. Meißner; N. Kaiser; V. Bernard

On the Interpretation of $\pi N \to \pi \pi N$ Data near Threshold

High Energy Physics - Phenomenology 2014-11-17 v1 Nuclear Theory

Authors: M. G. Olsson , Ulf-G. Meißner , N. Kaiser , V. Bernard

Abstract

Near threshold pion production experiments have been recently carried out and used to extract S--wave $\pi\pi$ scattering lengths. We emphasize here that at present these processes are related only at the tree level (and its first correction) in chiral perturbation theory. Higher order corrections (including loops) must be evaluated before rigorous claims concerning S--wave $\pi\pi$ scattering lengths can be made.

Keywords

pion production threshold S-wave pi pi scattering lengths chiral perturbation theory higher order corrections

Cite

@article{arxiv.hep-ph/9503237,
  title  = {On the Interpretation of $\pi N \to \pi \pi N$ Data near Threshold},
  author = {M. G. Olsson and Ulf-G. Meißner and N. Kaiser and V. Bernard},
  journal= {arXiv preprint arXiv:hep-ph/9503237},
  year   = {2014}
}

Comments

8 pp, LaTeX file, 2 figures (appended as uuencoded compressed tar files, look for 'figo.uu')

On the Interpretation of $\pi N \to \pi \pi N$ Data near Threshold

Abstract

Keywords

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