- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Measurement of Vub using b semileptonic decay
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Measurement of Vub using b semileptonic decay Lu, Jiansen
Abstract
The magnitude of the CKM matrix element |V[sub ub]| is determined by measuring the inclusive charmless semileptonic branching fraction of beauty hadrons at OPAL based on b X[sub u]lv event topology and kinematics. This analysis uses OPAL data collected between 1991 and 1995, which correspond to about four million hadronic Z decays. Bv(b X[sub u]lv) is measured to be (1.63 ± 0.53 [sup+0.55][sub -0.62]) x 10 ⁻³. The first uncertainty is the statistical error and the second is the systematic error. From this analysis, |V[sub ub]| is determined to be: |V[sub ub]| = (4.00 ± 0.65 (stat) [sup +0.67][sub -0.76] (sys) ± 0.19 (HQE)) x 10 ⁻³. The last error represents the theoretical uncertainties related to the extraction of |V[sub ub]| from Br(6 —> X[sub u]lv) using the Heavy Quark Expansion.
Item Metadata
Title |
Measurement of Vub using b semileptonic decay
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
2002
|
Description |
The magnitude of the CKM matrix element |V[sub ub]| is determined by measuring the
inclusive charmless semileptonic branching fraction of beauty hadrons at OPAL based
on b X[sub u]lv event topology and kinematics. This analysis uses OPAL data collected
between 1991 and 1995, which correspond to about four million hadronic Z decays.
Bv(b X[sub u]lv) is measured to be (1.63 ± 0.53 [sup+0.55][sub -0.62]) x 10 ⁻³. The first uncertainty is
the statistical error and the second is the systematic error. From this analysis, |V[sub ub]| is
determined to be:
|V[sub ub]| = (4.00 ± 0.65 (stat) [sup +0.67][sub -0.76] (sys) ± 0.19 (HQE)) x 10 ⁻³.
The last error represents the theoretical uncertainties related to the extraction of |V[sub ub]|
from Br(6 —> X[sub u]lv) using the Heavy Quark Expansion.
|
Extent |
10192187 bytes
|
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2009-09-23
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0085500
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
2002-05
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.