Hadronic Atoms in QCD
classification
✦ hep-ph
keywords
atomhadronica0-a2allowsapplyapproachatomsbreaking
pith:ZXU422HG Add to your LaTeX paper
What is a Pith Number?\usepackage{pith}
\pithnumber{ZXU422HG}
Prints a linked pith:ZXU422HG badge after your title and writes the identifier into PDF metadata. Compiles on arXiv with no extra files. Learn more
read the original abstract
We propose a non relativistic effective Lagrangian approach to study hadronic atom observables in the framework of QCD (including photons). We apply our formalism to derive a general expression for the width of the pi+pi- atom decaying into two neutral pions. It contains all terms at leading and next-to-leading order in isospin breaking. The result allows one to evaluate the combination a0-a2 of pi-pi S-wave scattering lengths from pi+pi- atom lifetime measurements, like the one presently performed by the DIRAC expeiment at CERN.
This paper has not been read by Pith yet.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.