Measurement of direct CP asymmetry in B± → J/ K± decays produced in pp̅ collisions at √s = 1.96TeV

CP Asymmetry;Collider Detector at Fermilab (CDF);CP (charge particle)

Thompson, Gregory A.

关键词: CP Asymmetry;    Collider Detector at Fermilab (CDF);    CP (charge particle);   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/26162/Thompson_Gregory.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

A measurement of direct CP asymmetry is performed using 6fb−1 of pp̄ collisions at√s = 1.96TeV from theCDF detector at the Fermi National Accelerator Laboratory. Approximately 80,000 B− → J/ K− (and charge conjugate) events were selected on the dimuon trigger and the yields were determined using a simultaneous mass and lifetimefit. After corrections, a measurement of ACP = 0.0034 ± 0.0043(stat.) ± 0.0060(syst.) is obtained, which isconsistent with the SM prediction and previous measurements at DØ and the B factories.