Medium effects of low energy pions

E. Friedman*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Fits of pion-nucleus potentials to large sets of pionic atom data reveal departures of parameter values from the corresponding free πN parameters. These medium effects can be quantitatively reproduced by a chiral-motivated model where the pion decay constant is modified in the medium or by including the empirical on-shell energy dependence of the amplitudes. No consistency is obtained between pionic atoms and the free πN interaction when an extreme off-shell chiral model is used. The role of the size of data sets is briefly discussed.

Original languageEnglish
Pages (from-to)979-989
Number of pages11
JournalActa Physica Polonica B
Volume35
Issue number3
StatePublished - Mar 2004
EventXXVIII Mazurian Lakes Conference on Physics: Atomic Nucleus as a Laboratory for Fundamental Processes - Krzyze, Poland
Duration: 31 Aug 20037 Sep 2003

Fingerprint

Dive into the research topics of 'Medium effects of low energy pions'. Together they form a unique fingerprint.

Cite this