Precision measurements of ππ scattering lengths at NA48/2

被引：1

作者：

Bizzeti, Andrea ^{[1
]}

机构：

[1] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy

来源：

12TH INTERNATIONAL CONFERENCE ON MESON-NUCLEON PHYSICS AND THE STRUCTURE OF THE NUCLEON (MENU 2010) | 2011年 / 1374卷

关键词：

Kaon decays; pion; scattering length; PHASE-SHIFTS; KE4; DECAYS; EQUATION;

D O I：

10.1063/1.3647221

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Low energy pp scattering has been studied with high precision by the NA48/2 experiment at the CERN SPS using large data samples of K-+/- -> pi(+/-)pi(0)pi(0) and K-+/- -> pi(+)pi(-)e(+/-)v . (K-e4) decays. The pi(0)pi(0) invariant mass distribution in the K-+/- -> pi(+/-)pi(0)pi(0) decay exhibits a Wigner cusp at the pi(+)pi(-) threshold, from which the scattering lengths a(0) and a(2) are extracted. The measurement of a(0) and a(2) is also performed from K-e4 decay, with similar precision. The combination of these measurement provides a stringent test of Chiral Perturbation Theory.

引用

页数：4

共 21 条

[1] ππ SCATTERING LENGTHS FROM MEASUREMENTS OF Ke4 AND K± → π±π0π0 DECAYS AT NA48/2
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[10] Rare kaon decay measurements with NA48/NA62 minumum bias data
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