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Communication Dans Un Congrès Année : 2009

Dispersive representation of K -> 3 pi amplitudes and cusps

Résumé

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.

Dates et versions

hal-00329565 , version 1 (13-10-2008)

Identifiants

Citer

Karol Kampf, Marc Knecht, Jiri Novotny, Martin Zdrahal. Dispersive representation of K -> 3 pi amplitudes and cusps. 14th High-Energy Physics International Conference On Quantum ChromoDynamics (QCD 08), Jul 2008, Montpellier, France. pp.334-337, ⟨10.1016/j.nuclphysbps.2008.12.075⟩. ⟨hal-00329565⟩
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