A study of D*+ π- production in semileptonic B decay

• Main Authors: BUSKULIC, D., THULASIDAS, M.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 1995
• Subjects: Computer Sciences; Databases and Information Systems
• Online Access: https://ink.library.smu.edu.sg/sis_research/5832; https://ink.library.smu.edu.sg/context/sis_research/article/6835/viewcontent/A_study_of_D___production_in_semileptonic_B_decay.pdf
• Institution: Singapore Management University

In a sample of 1.5 million hadronic decays of the Z collected by the ALEPH detector, a search is carried out for the decays B→ D10(2420)l−νX and B→ D2∗0(2460)l−νX. The product branching ratio for D10 production is measured to be Br(b →B) × Br(B→ D10l−νX) × Br(D10→ D∗+π−) = (2.04 ± 0.58stat± 0.34syst) × 10−3, and a 95% confidence level limit of Br(b →B) × Br(B→ D2∗0l−νX) × Br(D2∗0→ D∗+π−) ≤ 0.81 × 10−3 is obtained for D2∗0 production.A topological search sensitive to the processes above, but also to wide resonances that decay to D∗+π− and to non-resonant D∗+π− production is also carried out, yielding Br(b→B) ×Br(B→D∗+π−l−νX)= (3.7 ± 1.0stat± 0.7syst) × 10−3. Direct evidence of D∗π production inconsistent with D10 and D2∗0 in semileptonic B decay is presented.