Details

Autor(en) / Beteiligte

• D'Ambrosio, G.
• Knecht, M.
• Neshatpour, S.

Titel

Determination of the structure of the K → πππ amplitudes from recent data

Ist Teil von

• Physics letters. B, 2022-12, Vol.835, p.137594, Article 137594

Ort / Verlag

Elsevier

Erscheinungsjahr

2022

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• This Letter provides a new determination of the ten real coefficients that describe the structure of the K→πππ amplitudes in the limit where isospin is conserved and complex phases, due to either CP violation or final-state rescattering, are neglected. This determination is obtained through a fit to the data on the Dalitz-plot structures and partial-decay rates collected during the last twenty years by several high-precision experiments. The fitting procedure and the way the experimental data have been handled in the fit are discussed in detail. Our fit leads to a more precise determination of the coefficients describing the linear and quadratic slopes of the K→πππ amplitudes.