Measurement of CP Content and Time-Dependent CP Violation in B0 --> D*+D*- Decays.

Anderson, J. M.

Technical Information Center Oak Ridge Tennessee

关键词: Decay;    CP Invariance;    Accelerators;    Measurement;    Standard model;   

RP-ID  :  DE2009945291

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

This dissertation presents the measurement of the Cp-odd fraction and time-dependent CP violation parameters for the B(sup 0) (yields) D*(sup +) D*(sup -) decay. These results are based on the full BABAR dataset of (467 (+-) 5) x 10(sup 6) B(bar B) pairs collected at the PEP-II B Factory at the Stanford Linear Accelerator Center. An angular analysis finds that the CP-odd fraction of the B(sup 0) (yields) D*(sup +) D*(sup -) decay is R(sub (perpendicular)) = 0.158 (+-) 0.028 (+-) 0.006, where the first uncertainty is statistical, and the second is systematic. A fit to the flavor-tagged, time-dependent, angular decay rate yields C(sub +) = 0.02 (+-) 0.12 (+-) 0.02; C(sub (perpendicular)) = 0.41 (+-) 0.50 (+-) 0.08; S(sub +) = -0.76 (+-) 0.16 (+-) 0.04; S(sub (perpendicular)) = -1.81 (+-) 0.71 (+-) 0.16, for the CP-odd ((perpendicular)) and CP-even (+) contributions. Constraining these two contributions to be the same results in C = 0.047 (+-) 0.091 (+-) 0.019; S = -0.71 (+-) 0.16 (+-) 0.03. These measurements are consistent with the Standard Model and with measurements of sin2(beta) from B(sup 0) (yields) (c(bar c))K(sup 0) decays.