Spectra and decays of π π and π K atoms

2004/05/05 by D. V. Bugg, J. Schweizer, Julia Schweizer · 2 citations
Chemistry · Physics and Astronomy · #Chemistry #High-Energy Particle Collisions Research #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Pi #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spectral line #hep-ph

paper · pdf · doi:10.1140/epjc/s2004-01959-1

published as Eur.Phys.J. C36 (2004) 483-501 · 37 pages, 6 figures

arxiv created 2004/05/05 · openalex publication_date 2004/07/27 · openalex created_date 2016/06/24 · arxiv updated 2017/02/08 · openalex updated_date 2026/08/05

Abstract

We describe the spectra and decays of pi pi and pi K atoms within a non-relativistic effective field theory. The evaluations of the energy shifts and widths are performed at next-to-leading order in isospin symmetry breaking. We provide general formulae for all S-states, and discuss the states with angular momentum one in some detail. The prediction for the lifetime of the pi K atom in its ground-state yields tau = (3.7 ± 0.4) * 10^-15 sec.

Citations

• Virtual photons in SU(2) chiral perturbation theory and electromagnetic corrections to ππ scattering
• Nonrelativistic pion interactions and the pionium lifetime
• The low energy ππ amplitude to one and two loops
• The infrared divergence phenomena and high-energy processes
• Asymptotic expansion of Feynman integrals near threshold
• Chiral perturbation theory: Expansions in the mass of the strange quark

Cited by

• Measurement of the πK atom lifetime and the πK scattering length
• The expansion by regions in πKscattering