Some current problems in particle physics beyond the standard model

Thesis/Dissertation · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5796188

Rohm, R M

In this thesis several problems are addressed in trying to extend particle physics beyond the standard model. In chapter 1, the cross section for fermions scattering from cosmic string solitons which are left from symmetry-breaking phase transitions in the early universe are computed, and the consequences for the possibility of observing the strings are discussed. In chapter 2, the form of the Wess-Zumino anomalous interaction term for the 2-dimensional supersymmetric nonlinear sigma-model was derived; in chapter 3, a similar technique is applied to the 4-dimensional supersymmetric nonlinear sigma-model, and constraints are obtained on the form of low-energy effective actions of supersymmetric gauge theories. In particular, it is shown that sigma-models on compact manifolds cannot have a Wess-Zumino interaction with unbroken supersymmetry. In chapter 4, a mechanism for breaking supersymmetry in supersymmetric string theories is analyzed, which have the potential to provide unification of gauge interactions with gravity in a consistent quantum theory.

• Research Organization: Princeton Univ., NJ (USA)
• OSTI ID: 5796188
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SIGMA MODEL
SYMMETRY BREAKING
STRING MODELS
FERMIONS
NONLINEAR PROBLEMS
PHASE TRANSFORMATIONS
SCATTERING
SOLITONS
SUPERSYMMETRY
COMPOSITE MODELS
EXTENDED PARTICLE MODEL
MATHEMATICAL MODELS
PARTICLE MODELS
QUARK MODEL
QUASI PARTICLES
SYMMETRY
645400* - High Energy Physics- Field Theory