Cusps in KL→3π decays

✍ Scribed by M. Bissegger; A. Fuhrer; J. Gasser; B. Kubis; A. Rusetsky

• Book ID: 104089440
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 163 KB
• Volume: 61
• Category: Article
• ISSN: 0146-6410
• DOI: 10.1016/j.ppnp.2007.12.011

✦ Synopsis

The pronounced cusp in K → 3π decays which is generated by the pion mass difference is directly related to the ππ S-wave scattering lengths. We apply a nonrelativistic effective field theory framework to evaluate the amplitudes for K L → 3π decays in a systematic manner. Electromagnetic effects in the neutral channel K L → 3π 0 are also discussed.