Dispersive representation of K -> 3 pi amplitudes and cusps
- Author(s)
- K Kampf, M Knecht, J Novotný, Martin Zdrahal
- Abstract
The NA48/2 collaboration has shown clear experimental evidence for a cusp in the data for K -> pi pi^0 pi^0. This effect can be used to extract information on the pi-pi scattering lengths. We address this issue using a two-loop dispersive construction of pi pi -> pi pi and K -> pi pi pi amplitudes in the presence of isospin breaking.
- Organisation(s)
- Particle Physics
- External organisation(s)
- Paul Scherrer Institute, Charles University Prague, Aix-Marseille Université
- Pages
- 334-337
- No. of pages
- 4
- Publication date
- 2009
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/dispersive-representation-of-k--3-pi-amplitudes-and-cusps(3fe3a1be-a199-47a8-b783-78a4d07c4b68).html