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
收藏
页数：4
相关论文
共 21 条
  • [21] Mass measurements for the Tz =-2 fp-shell nuclei 40Ti, 44Cr, 46Mn, 48Fe, 50Co, and 52Ni
    Fu, C. Y.
    Zhang, Y. H.
    Wang, M.
    Zhou, X. H.
    Litvinov, Yu A.
    Blaum, K.
    Xu, H. S.
    Xu, X.
    Shuai, P.
    Lam, Y. H.
    Chen, R. J.
    Yan, X. L.
    Chen, X. C.
    He, J. J.
    Kubono, S.
    Sun, M. Z.
    Tu, X. L.
    Xing, Y. M.
    Zeng, Q.
    Zhou, X.
    Zhan, W. L.
    Litvinov, S.
    Audi, G.
    Uesaka, T.
    Yamaguchi, T.
    Ozawa, A.
    Sun, B. H.
    Sun, Y.
    Xu, F. R.
    PHYSICAL REVIEW C, 2020, 102 (05)
123