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Dualities, Helicity Amplitudes, and Little Conformal Symmetry: Springer Theses

Autor Kitran Macey M. Colwell
en Limba Engleză Hardback – 21 noi 2017
This book develops two exciting areas of particle physics research. It applies the recent new insights about the usefulness of helicity amplitudes in understanding gauge theory to the long-standing effort to understand theories with both electric and magnetic charges. It is known that for some supersymmetric theories there is an exact duality that relates two descriptions of the physics, one where the electric charges are weakly coupled and another where the electric charges are strongly coupled. The calculations in this thesis suggest that this duality can also hold in the low-energy limit of nonsupersymmetric gauge theories. The idea of addressing the hierarchy problem of the standard model Higgs mechanism using conformal symmetry is also explored. Analogously to “Little Higgs” models, where divergences are cancelled only at one-loop order, models are studied that have infrared conformal fixed points which related gauge and Yukawa couplings, allowing for a cancellation between seemingly unrelated quantum loop diagrams.
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Specificații

ISBN-13: 9783319673912
ISBN-10: 3319673912
Pagini: 107
Ilustrații: XV, 107 p. 15 illus., 5 illus. in color.
Dimensiuni: 155 x 235 mm
Greutate: 0.35 kg
Ediția:1st ed. 2017
Editura: Springer International Publishing
Colecția Springer
Seria Springer Theses

Locul publicării:Cham, Switzerland

Cuprins

Chapter1. Electromagnetic Duality.- Chapter2. Spinor Helicity Formalism.- Chapter3. Non-Abelian Monopoles.- Chapter4. Scattering Amplitudes.- Chapter5. Little Conformal Symmetry.

Notă biografică

Dr. Kitran Colwell received a Ph.D. in Physics from the University of California, Davis in 2016, and now has a position at Diablo Valley College, California.

Textul de pe ultima copertă

This thesis develops two exciting areas of particle physics research. It applies the recent new insights about the usefulness of helicity amplitudes in understanding gauge theory to the long-standing effort to understand theories with both electric and magnetic charges. It is known that for some supersymmetric theories there is an exact duality that relates two descriptions of the physics, one where the electric charges are weakly coupled and another where the electric charges are strongly coupled. The calculations in this thesis suggest that this duality can also hold in the low-energy limit of nonsupersymmetric gauge theories. The idea of addressing the hierarchy problem of the standard model Higgs mechanism using conformal symmetry is also explored. Analogously to “Little Higgs” models, where divergences are cancelled only at one-loop order, models are studied that have infrared conformal fixed points which related gauge and Yukawa couplings, allowing for a cancellation between seemingly unrelated quantum loop diagrams.

Caracteristici

Nominated as an outstanding Ph.D. thesis by the University of California, Davis Applies recent discoveries connecting helicity amplitudes and gauge theory to the study of theories with both electric and magnetic charges Presents new insight into low-energy limit of nonsupersymmetric gauge theories Uses conformal symmetry to investigate the hierarchy problem of the standard model Higgs mechanism Includes supplementary material: sn.pub/extras