Analysis of B [sigma] flavor oscillations at CDF

The search for and the study of flavor oscillations in the neutral B,B, meson system is an experimentally challenging endeavor. This constitutes a flagship analysis of the Tevatron proton-antiproton collider physics program. In this dissertation we develop such an analysis of the time-dependent B, flavor oscillations using data collected with the CDF detector. The data samples are formed of both fully and partially reconstructed B meson decays, B, -+ D7r(irir) and B8 -- Dalv. A likelihood fitting framework is implemented and appropriate models and techniques developed for describing the mass, proper decay time, and flavor tagging characteristics of the data samples. The analysis is extended to samples of B+ and Bo mesons, which are further used for algorithm calibration and method validation. The B mesons lifetimes are extracted. The measurement of the Bo oscillation frequency yields Amd = 0.522 ± 0.017 ps-1. The search for B, oscillations is performed using an amplitude method based on a frequency scanning procedure. Applying a combination of lepton and jet charge flavor tagging algorithms, with a total tagging power ED2 of 1.6%, to a data sample of 355 pb-1, a sensitivity of 13.0 ps-1 is achieved.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Physics.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2007

Author dc:creator

• Leonardo, Nuno Teotónio Viegas Guerreiro

Advisor dc:contributor.advisor

• Christoph M. E. Paus.

• Physics.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/39293

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/39293