87 citations · 157 across the 4 of their papers we have counts for
4 papers
Decays of the pi+ pi- atom
J. Gasser, V. E. Lyubovitskij, A. Rusetsky +1
We construct an effective non-relativistic quantum field theory that describes bound states of pi+ pi- pairs and their hadronic decays. We then derive a general expression for the…
Effective Lagrangians in bound state calculations
V. Antonelli, A. Gall, J. Gasser +1
In order to investigate specific aspects of bound state calculations in a non-relativistic framework, we consider the energy-levels of a massive scalar particle, which moves in an…
Matching in Nonrelativistic Effective Quantum Field Theories
A. Gall
Nonrelativstic effective field theories have shown to be a useful framework to describe systems of weakly bound particles. This work focuses on the matching procedure to the underl…
On the Lifetime of the pi+pi- Atom
A. Gall, J. Gasser, V. E. Lyubovitskij +1
The pi+pi- atom decays -in the ground state - predominantly into two neutral pions. We present a general expression for the corresponding decay width in the framework of QCD (inclu…