Measurement of ππ Scattering Lengths from Ke4 and K3π Decays

被引：1
|
作者：
Wanke, R. [1 ]
机构：
[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2011年 / 210-11卷
关键词：
D O I：
10.1016/j.nuclphysbps.2010.12.073
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
In the last few years it has become possible to study low energy pi pi scattering with high precision in kaon decays, thanks to the high statistics measurements of K-+/- -> pi(+/-)pi(0)pi(0) (K-3 pi) and K-+/- -> pi(+)pi(-)e(+/-)nu (K-e4) decays performed by the NA48/2 experiment at the CERN SPS. In K-+/- -> pi(+/-)pi(0)pi(0), at the pi(+)pi(-) threshold, the pi(0)pi(0) mass spectrum exhibits a Wigner-cusp, from which the scattering lengths a(0) and a(2) are extracted. From the study of K-e4 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.
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页码：193 / 196
页数：4
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