Simulation free measurement of the B+ → $$\bar{D}$$0π+ lifetime using decays selected using displaced tracks
- St. Anne's College, Oxford (United Kingdom)
The lifetime of the B± meson is measured using the decay channel B+ → $$\bar{D}$$0π+. The measurement is made using approximately 1.0 fb-1 of Tevatron proton-anti-proton collision data at √s = 1.96 TeV collected by the CDF detector. The data were collected using impact parameter based triggers that were designed to select events with a secondary vertex. The trigger selection criteria result in data rich in a variety of B hadron decays, but intrinsically bias the lifetime distribution of the collected signal events. The traditional way to compensate for the bias is to use information from simulation. Presented here is a new method for correction of the lifetime bias using an analytical technique that uses information from the data only. This eliminates measurement uncertainty due to data and simulation agreement, ultimately resulting in a smaller systematic measurement uncertainty. The B± lifetime measurement is the first measurement using this new technique and demonstrates its potential for use in future measurements. The B± lifetime is measured to be τ(B±) = 1.662 ± 0.023(stat) ± 0.015(syst)ps.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 950872
- Report Number(s):
- FERMILAB-THESIS-2009-06; TRN: US0902069
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the $B^-$ lifetime using a simulation free approach for trigger bias correction
A Measurement of the Lifetime of the Λb Baryon with the CDF Detector at the Tevatron Run II