Flavor hierarchy from extra dimension and gauge threshold correction

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Dynamical quasi-localization of matter fields in extra dimension is an elegant mechanism to generate hierarchical 4-dimensional Yukawa couplings. We point out that a bulk matter field whose zero mode is quasi-localized can give a large Kaluza-Kicin threshold correction to low energy gauge couplings, which is generically of the order of In(Yukawa)/8pi(2), so it can significantly affect gauge coupling unification. We compute such threshold corrections in generic 5-dimensional theories compactified on S-1/Z(2) x Z(2), and apply the result to grand unified theories on orbifold generating small Yukawa couplings through quasi-localization. (C) 2004 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2004-05
Language
English
Article Type
Article
Keywords

STRING UNIFICATION; GRAND UNIFICATION; REGULARIZATION; ORBIFOLDS; ANOMALIES; BREAKING; MASSES; GUT

Citation

NUCLEAR PHYSICS B, v.687, pp.101 - 123

ISSN
0550-3213
DOI
10.1016/j.nuclphysb.2004.03.018
URI
http://hdl.handle.net/10203/82907
Appears in Collection
PH-Journal Papers(저널논문)
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