Unification with extra dimensions = 고차원 이론에서의 대통일 이론

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We study the gauge unification in higher-dimensional orbifold field theory which is known to be useful for constructing a natural model of gauge unification which is free from difficulties that the conventional 4 dimensional grand unified theories suffer from. We begin with examining the gauge coupling renormalization in orbifold field theory in the context of 4 dimensional effective supergravity. We obtain the 1-loop correction to the gauge coupling in generic 5 dimensional super-Yang-Mills models defined on a slice of AdS5 preserving N=1 supersymmetry. We also calculate the full 1-loop corrections to the low energy coupling of bulk gauge boson in AdS5 due to 5D general scalar, fermion and vector fields with arbitrary $Z_2\times Z^``_2$ orbifold boundary condition. Using these results, we derive the Kaluza-Klein threshold corrections to low energy gauge coupling due to quasi-localized matter fields which generate hierarchical 4 dimensional Yukawa couplings. Applying the results to 5 deminsional orbifold GUT``s, we discuss the conditional for a 5 dimensional grand unified theory to generate hierarchical Yukawa coupling without spoiling successful gauge coupling unification.
Advisors
Choi, Ki-Woonresearcher최기운researcher
Description
한국과학기술원 : 물리학과,
Publisher
한국과학기술원
Issue Date
2006
Identifier
254163/325007  / 020015062
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 물리학과, 2006.2, [ v, 84 p. ]

Keywords

Gauge Coupling Unification; Extra Dimension; Grand Unified Theory; Supersymmetry; 초대칭; 게이지작용상수통일; 부가차원; 대통일이론

URI
http://hdl.handle.net/10203/47383
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=254163&flag=dissertation
Appears in Collection
PH-Theses_Ph.D.(박사논문)
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