Grid Development and a Study of B-flavour tagging at D0
- Imperial College, London (United Kingdom)
Run IIa of the D0 experiment at the Tevatron took place between Spring 2002 and Spring 2006, collecting approximately 1.2 fb-1 of data. A fundamental principal of the D0 computing model is the utilization of globally distributed computing resources as part of a grid. In particular use is made of the 'SAMGrid'. The first part of this thesis describes the work undertaken at Imperial College on several D0 distributed computing projects. These included the deployment and development of parts of the SAMGrid software suite, and participation in the Winter 2003/2004 data reprocessing effort. One of the major goals of the D0 experiment is the observation of mixing in the B$$0\atop{s}$$-meson system. The measurement of the mixing frequency is important as it can be used to constrain the CKM matrix, which describes CP violation in the Standard Model. The second part of this thesis describes the development of an opposite side flavour tagging algorithm and its calibration using B+ and B$$0\atop{d}$$ meson decays. The application of this algorithm to an analysis of the B$$0\atop{s}$$ meson system is then described, which lead to the world's first two-sided limit on the B$$0\atop{s}$$ meson oscillation frequency (Δms) which was measured to lie in the interval between 17 ps-1 and 21 ps-1 at the 90% confidence level.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 948185
- Report Number(s):
- FERMILAB-THESIS-2006-76; TRN: US0901589
- Country of Publication:
- United States
- Language:
- English
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