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UBC Theses and Dissertations
Derivation of amplitudes for [pi] - 2[pi] reaction channels using the oset-vicente-vacas model, and calculation of the chiral symmetry breaking parameter Fazel, Neil Behzad
Abstract
The Oset and Vicente-Vacas model for π N --> π πN reaction has ben used to derive
theoretical values of the amplitudes and cross sections for the π - 2π reaction channels.
It is shown that the N* --> N(π π)s—wave mechanism is required in order to obtain
agreement with the world data for the π-ρ --> π-π+ and π-ρ ---> π0 π0 n channels. The
x2 analyses of the world data near threshold for all the channels strongly support the
Weinberg's value of Ƹ = 0 for the chiral symmetry breaking parameter. The value of
C, the factor related to N*Nπ π coupling through the exchange of the scalar meson ε,
was estimated to be C = (-1.97 + 0.11) μ-1.
Item Metadata
| Title |
Derivation of amplitudes for [pi] - 2[pi] reaction channels using the oset-vicente-vacas model, and calculation of the chiral symmetry breaking parameter
|
| Creator | |
| Publisher |
University of British Columbia
|
| Date Issued |
1992
|
| Description |
The Oset and Vicente-Vacas model for π N --> π πN reaction has ben used to derive
theoretical values of the amplitudes and cross sections for the π - 2π reaction channels.
It is shown that the N* --> N(π π)s—wave mechanism is required in order to obtain
agreement with the world data for the π-ρ --> π-π+ and π-ρ ---> π0 π0 n channels. The
x2 analyses of the world data near threshold for all the channels strongly support the
Weinberg's value of Ƹ = 0 for the chiral symmetry breaking parameter. The value of
C, the factor related to N*Nπ π coupling through the exchange of the scalar meson ε,
was estimated to be C = (-1.97 + 0.11) μ-1.
|
| Extent |
3004630 bytes
|
| Genre | |
| Type | |
| File Format |
application/pdf
|
| Language |
eng
|
| Date Available |
2008-12-15
|
| 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 |
10.14288/1.0086505
|
| URI | |
| Degree (Theses) | |
| Program (Theses) | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
|
| Graduation Date |
1992-11
|
| 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.