Measurement of the Bs0 lifetime and production rate with Ds- ℓ+ combinations in Z decays

• 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/5813; https://ink.library.smu.edu.sg/context/sis_research/article/6816/viewcontent/Measurement_of_the_B0_s_lifetime_and_production_rate_with_D__s_l__combinations_in_Z_decays.pdf
• Institution: Singapore Management University

A precise determination of the effective Bs0→K+K− lifetime can be used to constrain contributions from physics beyond the Standard Model in the Bs0 meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0fb−1 of data recorded by the LHCb experiment, the effective Bs0→K+K− lifetime is measured as 1.455±0.046(stat.)±0.006(syst.)ps.