Search for a Lifetime Difference in D(sup 0) Decays. The BABAR Collaboration.

Technical Information Center Oak Ridge Tennessee

关键词: Lifetime;    Particle decay;    Particle identification;    Pions plus;    Kaons minus;   

RP-ID  :  DE2004826711

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The D(sup 0) mixing parameter y = (Delta)(Lambda)/2(Lambda) was determined by measuring the D(sup 0) lifetime separately for the K(sup -)(pi)(sup +) decay mode and the K(sup -)K(sup +) decay mode with 12.4 fb(sup -1) of data collected by the BABAR experiment in 2001. Backgrounds were suppressed with the D* (yields) D(sup 0)(pi)(sup +) decay and particle identification. The following preliminary result was obtained: y = (-1.0 (+-) 2.2(stat) (+-) 1.7(syst))%.