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Anomalous Magnetic Moment of the W Boson in Different Models Couture, Gilles
Abstract
We consider the anomalous magnetic moment of the W boson, ĸ, from an experimental and from a theoretical point of view. In the first chapter,we consider five experiments where this parameter could in principle be measured. Our results show that the W pair-production remains the best process to measure ĸ. Single W production is very sensitive to ĸ, but it is plagued by very small cross-sections. Photon-electron colliders can also be valuable for measuring ĸ through single W production. In the second chapter, we consider a composite model where ĸ is essentially free. We found that it is impossible to rule out such a model from a single measurement of ĸ. We give detailed production rates for these processes. In the second half of the thesis, we set limits on the corrections to ĸ at the one loop level; first in the minimal SM and then in a two-Higgs-doublet model. The main results are that measured corrections of 0.1 would clearly indicate non-perturbative physics while the minimal SM can accommodate corrections up to 0.02. Possible extensions of the SM cannot increase this figure by much: unless one is willing to introduce several extra weakly interacting families, it remains that 75%, or more, of the corrections will arise from the minimal SM.
Item Metadata
Title |
Anomalous Magnetic Moment of the W Boson in Different Models
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1987
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Description |
We consider the anomalous magnetic moment of the W boson, ĸ, from an experimental and from a theoretical point of view. In the first chapter,we consider five experiments where this parameter could in principle be measured. Our results show that the W pair-production remains the best process to measure ĸ. Single W production is very sensitive to ĸ, but it is plagued by very small cross-sections. Photon-electron colliders can also be valuable for measuring ĸ through single W production. In the second chapter, we consider a composite model where ĸ is essentially free. We found that it is impossible to rule out such a model from a single measurement of ĸ. We give detailed production rates for these processes.
In the second half of the thesis, we set limits on the corrections to ĸ at the one loop level; first in the minimal SM and then in a two-Higgs-doublet model. The main results are that measured corrections of 0.1 would clearly indicate non-perturbative physics while the minimal SM can accommodate corrections up to 0.02. Possible extensions of the SM cannot increase this figure by much: unless one is willing to introduce several extra weakly interacting families, it remains that 75%, or more, of the corrections will arise from the minimal SM.
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Type | |
Language |
eng
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Date Available |
2010-07-28
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Provider |
Vancouver : University of British Columbia Library
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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.
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DOI |
10.14288/1.0085244
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Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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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.