Unification of the Fundamental Particle Interactions II (eBook, PDF)

Redaktion: Ellis, John

• Format: PDF

Produktbeschreibung

Work on the unification of the fundamental particle interac tions has continued vigorously since the first Europhysics study Conference on this subject. At that time we emphasized the exis tence of two main approaches, one based on supersymmetry and pos sibly its local version, supergravity, and the other approach based on grand unified gauge theories. Discussion of the possible tests of these theoretical speculations included experiments on baryon decay and neutrino oscillations. In view of the uncertainties surrounding the observability of such phenomena, the early Universe was welcomed as a possible Laboratory for testing new theoretical ideas. At that time, we expressed the hope that the different gauge and super symmetry approaches would cross-fertilize each other" and it is appropriate to ask now how much of that hope has been realized. We believe there has recently been considerable theoretical rapprochement, which is amply reflected in these Proceedings. On the one hand it has been realized that many of the technical pro blems in grand unified gauge theories, such as arranging the hierarchy of different mass scales, may be alleviated using simple global supersymmetry. On the other hand there has been growing interest in the possibility that extended supergravity theories may furnish a suitable framework for the unification of all the fundamental particle interactions. Many physicists in fact now question actively whether the known "fundamental" particles are in deed elementary, or whether they are composite.

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Produktdetails

• Verlag: Springer US
• Seitenzahl: 527
• Erscheinungstermin: 6. Dezember 2012
• Englisch
• ISBN-13: 9781461592990
• Artikelnr.: 44182058

Inhaltsangabe

GUTs versus Susy GUTs.- Relations between Grand Unified and Monopole Theories.- Kaluza-Klein-Kounterterms.- Local SO(8) × SU(8) Invariance in N = 8 Supergravity and its Implication for Superunification.- Recent Developments in the Group Manifold Approach.- Supercurrent and Anomalies in supersymmetrical Yang-Mills theories.- Grand Unification in Extended Supergravity.- Bound State Regge Trajectories in N = 8 Supergravity.- New Results in Conformal Supergravity.- Unitary Realizations of the Non-Compact Symmetry Groups of Supergravity.- Towards Unification with just Fundamental Fermions.- Baryon Stability and Neutrino Oscillations.- The Universe Strikes Back.- Supersymmetry in Nuclei.- Axions.- CP Violation, Cosmological Baryon Asymmetry and Neutrino Masses - the Effect of Intermediate Mass Scales.- Some Aspects of Supersymmetry Breaking.- Fermion Masses, Global Symmetries and the Strong CP Problem.- Supersymmetry Breaking Through a Cosmological Constant.- Symmetry Breaking in Supersymmetric GUTs.- Quantization and Auxiliary Fields in 11 Dimensions.- Geometrical Constraints on Supergravity Coupling.- On Kaluza-Klein Theories.- Gravity as a Dynamical Consequence of the Strong, Weak and Electromagnetic Interactions.- Unification of Gauge and Gravity Interactions from Compositeness.- Some Remarks about Quantum Gravity.- From Quantum Cosmology to Quantum Gravity.- Minimal Hypotheses for Particle Definition in Curved Space-Time.- Fermions in the Desert.- The Weak Interaction as an Indirect Manifestation of Hypercolour.- Constraints on Composite Models of Quarks and Leptons.- Instantons in Supersymmetric Quantum Mechanics.- Galilean Approximation of Massless Supersymmetric Theories.