Ja n 20 07 Rare K Decays Contribution to the proceedings of HQL 06 , Munich , October 16 th - 20 th 2006
نویسنده
چکیده
Here we give a brief description of the KTeV experiment [1] [2] . There were two configurations, E832 and E799, shown respectively in Fig. 1 and Fig. 2. . E832 was designed primarily to measure the direct CP violation parameter ǫ/ǫ, while E799 was devoted to rare KL decays. Two KL beams were generated by 800 GeV/c protons on a target. In E832 a regenerator in one of the beams converted KL to KS. In E799 the regenerator was removed to have two KL beams. The beams were run at higher intensity in E799. The decays took place in a large vacuum decay region. In both configurations a magnetic spectrometer consisting of two sets of x and y drift chambers before and after an analysing magnet measured charged particles. Photons were measured in a 3100 element array of pure CsI blocks which had energy resolution of σ(E)/E = 0.45%+2%/ √
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