Pion-pion scattering and the K->3pi decay amplitudes
| dc.creator | Cabibbo, Nicola | |
| dc.creator | Isidori, Gino | |
| dc.date | 2005-02-14 | |
| dc.date.accessioned | 2026-07-07T10:29:25Z | |
| dc.date.available | 2026-07-07T10:29:25Z | |
| dc.description | We revisit the recently proposed method for the determination of the pi-pi scattering length combination a_{0}-a_{2}, based on the study of the pi0 pi0 spectrum in K+ -> pi+ pi0 pi0. In view of a precision measurement, we discuss here the effects due to smaller absorptive contributions to the K+ -> pi+ pi0 pi0 and K+ -> pi+ pi+ pi- amplitudes. We outline a method of analysis that can lead to a precision determination of a_{0}-a_{2} and is based on very general properties of the S matrix. The discussion of final-state rescattering and cusp effects is also extended to the two K_L -> 3pi coupled channels. Thanks to the present work, the theoretical error on the a_{0}-a_{2} combination extracted from the K+ -> pi+ pi0 pi0 spectrum is reduced to about 5%. A further reduction requires the evaluation of the effects arising from radiative corrections. | |
| dc.description | 32 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0502130 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0502130 | |
| dc.identifier | JHEP0503:021,2005 | |
| dc.identifier | doi:10.1088/1126-6708/2005/03/021 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177796 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Pion-pion scattering and the K->3pi decay amplitudes | |
| dc.type | text |