Measurement of the life-time of Kπatom and its Lamb-shift-Test of QCD in the non-perturvative region by extended DIRAC experiment

本研究的主要目的是在CERN PS上进行DIRAC实验，直接测量ππ和k π强子原子的寿命，推导ππ和π k对的散射长度。将这些值与手性摄动理论计算的高精度值进行比较，应该允许我们在非摄动区域对QCD进行测试。在此基础上，进一步研究了ππ和k π强子原子的激发态，测量了兰姆位移。

The main aim of the study is to execute the DIRAC experiment at CERN PS, measure directly the life times ofππand Kπhadronic atoms, and deduce the scattering lengths ofππandπK pairs. A comparison of those values with those calculated with a high precision by the chiral perturbation theory should allow us to make a test of QCD in the non-perturvative region. Also we aim at the extension of the study in order to investigate the excited states ofππand Kπhadronic atoms, and measure the Lamb shifts.