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Title: Flavor at the TeV scale with extra dimensions

Abstract

Theories where the standard model fields reside on a 3-brane, with a low fundamental cutoff and extra dimensions, provide alternative solutions to the gauge hierarchy problem. However, generating flavor at the TeV scale while avoiding flavor-changing difficulties appears prohibitively difficult at first sight. We argue to the contrary that this picture allows us to lower flavor physics close to the TeV scale. Small Yukawa couplings are generated by ''shining'' badly broken flavor symmetries from distant branes, and flavor and CP-violating processes are adequately suppressed by these symmetries. We further show how the extra dimensions avoid four dimensional disasters associated with light fields charged under flavor. We construct elegant and realistic theories of flavor based on the maximal U(3){sup 5} flavor symmetry which naturally generate the simultaneous hierarchy of masses and mixing angles. Finally, we introduce a new framework for predictive theories of flavor, where our 3-brane is embedded within highly symmetrical configurations of higher-dimensional branes. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [1];  [1];  [1]
  1. Department of Physics, University of California, Berkeley, California 94720 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20216478
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 11; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FLAVOR MODEL; UNIFIED GAUGE MODELS; U-3 GROUPS; EXTENDED PARTICLE MODEL; CP INVARIANCE; THEORETICAL DATA

Citation Formats

Arkani-Hamed, Nima, Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Hall, Lawrence, Smith, David, and Weiner, Neal. Flavor at the TeV scale with extra dimensions. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.61.116003.
Arkani-Hamed, Nima, Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Hall, Lawrence, Smith, David, & Weiner, Neal. Flavor at the TeV scale with extra dimensions. United States. doi:10.1103/PhysRevD.61.116003.
Arkani-Hamed, Nima, Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Hall, Lawrence, Smith, David, and Weiner, Neal. Thu . "Flavor at the TeV scale with extra dimensions". United States. doi:10.1103/PhysRevD.61.116003.
@article{osti_20216478,
title = {Flavor at the TeV scale with extra dimensions},
author = {Arkani-Hamed, Nima and Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720 and Hall, Lawrence and Smith, David and Weiner, Neal},
abstractNote = {Theories where the standard model fields reside on a 3-brane, with a low fundamental cutoff and extra dimensions, provide alternative solutions to the gauge hierarchy problem. However, generating flavor at the TeV scale while avoiding flavor-changing difficulties appears prohibitively difficult at first sight. We argue to the contrary that this picture allows us to lower flavor physics close to the TeV scale. Small Yukawa couplings are generated by ''shining'' badly broken flavor symmetries from distant branes, and flavor and CP-violating processes are adequately suppressed by these symmetries. We further show how the extra dimensions avoid four dimensional disasters associated with light fields charged under flavor. We construct elegant and realistic theories of flavor based on the maximal U(3){sup 5} flavor symmetry which naturally generate the simultaneous hierarchy of masses and mixing angles. Finally, we introduce a new framework for predictive theories of flavor, where our 3-brane is embedded within highly symmetrical configurations of higher-dimensional branes. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.61.116003},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}