Varying alpha, mass generation and extra dimensions

Details Varying alpha, mass generation and extra dimensions Varying alpha, mass generation and extra dimensions

2003-10-30

arxiv.org/abs/hep-ph/0310349v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

String Phenomenology 2003 Durham proceedings, space limited to 8 pages. World Scientific macro, amssymb, bm

Scientific paper

We consider variation of coupling strengths and mass ratios in and beyond the Standard Model, in the light of various mechanisms of mass generation. In four-dimensional unified models, variations in charged particle thresholds, light quark masses and the electron mass can completely alter the (testable) relation between Delta ln alpha and Delta ln mu, where mu equiv m_p/m_e. In extra-dimensional models where a compactification scale below the fundamental scale is varying, definite predictions may result even without unification; we examine some models with Scherk-Schwarz supersymmetry-breaking.

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