Yukawa hierarchies from extra dimensions with small FCNC

Technical Report · Tue Aug 26 04:00:00 EDT 2003

DOI:https://doi.org/10.2172/815242· OSTI ID:815242

Lillie, Ben ^[1]

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1. SLAC

We investigate a class of extra dimensional models where all of the Standard Model fermions are localized to a single fixed point in an S{sub 1}/Z{sub 2} orbifold, and each species is localized with an exponential wavefunction with a different width. We show that this naturally generates Yukawa hierarchies of the size present in the Standard Model, and we find a set of model parameters that reproduces the observed masses and mixings to experimental accuracy. In addition, the dominant constraints, arising from flavor changing neutral currents, are shown to restrict the compactification scale to be 1/R {>=} 2 - 5TeV, which is a much less stringent constraint than in similar extra dimensional models of the Yukawa hierarchy.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 815242
• Report Number(s): SLAC-PUB-10094
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
COMPACTIFICATION
DIMENSIONS
FERMIONS
NEUTRAL CURRENTS
STANDARD MODEL