Measurement of the cp violation parameter sin 2β

Thesis/Dissertation · Mon Feb 01 04:00:00 EST 1999

DOI:https://doi.org/10.2172/3124· OSTI ID:3124

Kelley, Kenneth Francis ^[1]

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1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Fermilab

This thesis presents a measurement of the time-dependent asymmetry in the rate of $$\bar{B}$$$$0\atop{d}$$ versus B$$0\atop{d}$$ decays to J/ΨK$$0\atop{s}$$. In the context of the Standard Model this is interpreted as a measurement of the CP violation parameter sin(2β). A total of 198{+-}17 B$$0\atop{d}$$/$$\bar{B}$$$$0\atop{d}$$ decays were observed in p$$\bar{p}$$ collisions at √s=1.8 TeV by the CDF detector at the Fermilab Tevatron. The initial B flavor (whether B⁰ or $$\bar{B}$$⁰) is determined by a same-side flavor tagging technique. The analysis results in sin(2β)=1.8±1.1(stat.)±0.3(syst.). This analysis demonstrates the feasibility of studying CP violation in the B⁰-$$\bar{B}$$⁰ system at a hadron collider. By applying the methods used in this analysis, future, higher-statistics experiments should be able to tightly constrain the parameters of the Standard Model.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER)
• OSTI ID: 3124
• Report Number(s): FERMILAB-THESIS--1998-40; ON: DE00003124
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
HADRONS
STANDARD MODEL