Measurements of A_b, R_b and the B^±,0 lifetimes at the Z⁰ resonance by SLD

详细信息    查看全文

• 作者：Richard Dubois ; Representing the SLD Collaboration
• 刊名：Nuclear Physics B - Proceedings Supplements
• 出版年：1997
• 出版时间：April 1997
• 年：1997
• 卷：55
• 期：1
• 页码：302-309
• 全文大小：545 K

文摘

R_b, A_b and the lifetimes of the B⁺ (B_u) and B⁰ (B_d) mesons have been measured using a sample of 150,000 hadronic Z⁰ decays collected by the SLD experiment at the SLC between 1993 and 1995. The analyses make use of a novel topological vertexing technique to obtain charge, decay length and vertex mass. The asymmetry A_b is measured with a self-calibrating technique employing momentum-weighted track charge from both hemispheres in the tagged events as well as by using the polar angle dependency of the Z⁰— pole polarized cross section and tagging the bottom and charmed hadrons in the semileptonic decay channel.