Reanalysis of pion pion phase shifts from K -> pi pi decays
- Autor(en)
- Vincenzo Cirigliano, Gerhard Ecker, A. Pich
- Abstrakt
We re-investigate the impact of isospin violation for extracting the s -wave ππ scattering phase shift difference δ0(MK)−δ2(MK)δ0(MK)−δ2(MK) from K→ππK→ππ decays. Compared to our previous analysis in 2003, more precise experimental data and improved knowledge of low-energy constants are used. In addition, we employ a more robust data-driven method to obtain the phase shift difference δ0(MK)−δ2(MK)=(52.5±exp0.8±theor2.8)°δ0(MK)−δ2(MK)=(52.5±0.8exp±2.8theor)°.
- Organisation(en)
- Teilchenphysik
- Externe Organisation(en)
- Los Alamos National Laboratory, Universitat de València
- Journal
- Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
- Band
- 679
- Seiten
- 445-448
- Anzahl der Seiten
- 4
- ISSN
- 0370-2693
- DOI
- https://doi.org/10.1016/j.physletb.2009.08.027
- Publikationsdatum
- 2009
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103036 Theoretische Physik
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/reanalysis-of-pion-pion-phase-shifts-from-k--pi-pi-decays(1801785e-971c-4081-8704-e397768c7317).html