6533b7dbfe1ef96bd1271357
RESEARCH PRODUCT
Measurement of ππ Scattering Lengths from and Decays
R. Wankesubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsLow energyLarge Hadron ColliderChiral perturbation theoryScatteringMass spectrumAtomic and Molecular Physics and Opticsdescription
In the last few years it has become possible to study low energy ππ scattering with high precision in kaon decays, thanks to the high statistics measurements of K ± → π ± π 0 π 0 ( K 3 π ) and K ± → π + π − e ± ν ( K e 4 ) decays performed by the NA48/2 experiment at the CERN SPS. In K ± → π ± π 0 π 0 , at the π + π − threshold, the π 0 π 0 mass spectrum exhibits a Wigner-cusp, from which the scattering lengths a 0 and a 2 are extracted. From the study of K e 4 decays a similar precision, but quite independent measurement of a 0 and a 2 can be obtained. The combination of both measurements provides one of the most stringent tests of Chiral Perturbation Theory.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | Nuclear Physics B - Proceedings Supplements |