INVESTIGATION OF SUPERSYMMETRIC LEFT-RIGHT THEORIES OF ELECTROWEAK INTERACTIONS (SUPER GRAVITY).
Item
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Title
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INVESTIGATION OF SUPERSYMMETRIC LEFT-RIGHT THEORIES OF ELECTROWEAK INTERACTIONS (SUPER GRAVITY).
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Identifier
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AAI8601645
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identifier
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8601645
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Creator
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GANGOPADHYAYA, ASIM.
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Contributor
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Rabindra N. Mohapatra
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Date
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1985
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Language
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English
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Publisher
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City University of New York.
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Subject
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Physics, Elementary Particles and High Energy
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Abstract
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We studied supergravity induced radiative breaking of SU(,R)(2)XU(1) group in left-right symmetric theories of electroweak interactions. We find that in order to have a minimum that breaks SU(,R)(2)XU(1) symmetry leaving SU(,L)(2) intact, the parity has to be broken at a scale much above the Tev region. We show that if a parity odd singlet is introduced in the theory that picks up VEV at superheavy scale then SU(,R)(2)XU(1) group breaks down radiatively via a nonzero VEV acquired by right handed s-neutrino. We analyse the resulting mass spectrum of charged and neutral fermions and find that theory does allow two low mass fermionic states that are predominantly tau lepton and the corresponding neutrino.;Then calculating the K(,L)-K(,S) mass difference we find that supersymmetric contributions negate a well known constraint on right handed mass scale (M(,W(,R)) > 1.6TeV). This implies that left-right theories could be a nontrivial alternative to standard model at low energies.;We prescribed a method of deriving renormalisation group equations (RGE) in explicitely broken supersymmetric theories using fully superspace methods. We claim that, to study the divergence structure of the theory efficiently, all supersymmetry breaking terms should be written in D-type form. Since calculating the divergent part is much easier in supergraphs than in component language, our prescriptions drastically reduce the work involved in derivation of RGE's. To corroborate our claims we derive the RGE's for a well known nontrivial model and reproduce all the equations that were obtained by component method.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Physics
