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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
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1992
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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.
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Extent |
3004630 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2008-12-15
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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 |
10.14288/1.0086505
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1992-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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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.