English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We revisit the recently proposed method for the determination of the pi-piscattering length combination a_{0}-a_{2}, based on the study of the pi0 pi0spectrum in K+ -> pi+ pi0 pi0. In view of a precision measurement, we discusshere the effects due to smaller absorptive contributions to the K+ -> pi+ pi0pi0 and K+ -> pi+ pi+ pi- amplitudes. We outline a method of analysis that canlead to a precision determination of a_{0}-a_{2} and is based on very generalproperties of the S matrix. The discussion of final-state rescattering and cuspeffects is also extended to the two K_L -> 3pi coupled channels. Thanks to thepresent work, the theoretical error on the a_{0}-a_{2} combination extractedfrom the K+ -> pi+ pi0 pi0 spectrum is reduced to about 5%. A further reductionrequires the evaluation of the effects arising from radiative corrections.Comment: 32 pages, 6 figure

Pion-pion scattering and the K→3π decay amplitudes