A measurement of the Λ$$0\atop{b}$$ lifetime at the D0 experiment
- Lancaster Univ. (United Kingdom)
This thesis describes a measurement of the lifetime of the Λ$$0\atop{b}$$ baryon, performed using data from proton-antiproton collisions at a centre of mass energy of 1.96 TeV. The decay Λ$$0\atop{b}$$ → Λ$$+\atop{c}$$μ-$$\bar{v}$$μX was reconstructed in approximately 1.3 fbμ-1 of data recorded by the D0 detector in 2002-2006 during Run II of the Fermilab Tevatron collider. A signal of 4437 ± 329 Λ$$+\atop{c}$$μ- pairs was obtained, and the Λ$$0\atop{b}$$ lifetime was measured using a binned X2 fit, which gives a value {tau}(Λ$$0\atop{b}$$) = 1.290$$+0.091\atop{-1.110}$$(stat)$$+0.085\atop{-0.091}$$(syst) ps. This result is consistent with the world average and is one of the most precise measurements of this quantity.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 924920
- Report Number(s):
- FERMILAB-THESIS-2007-56; TRN: US0802999
- Country of Publication:
- United States
- Language:
- English
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