Electroweak and flavour structure of a warped extra dimension with custodial protection

Michaela E. Albrecht; Monika Blanke; Andrzej J. Buras; Björn Duling; Katrin Gemmler

doi:10.1088/1126-6708/2009/09/064

Electroweak and flavour structure of a warped extra dimension with custodial protection

Michaela E. Albrecht
, Monika Blanke
, Andrzej J. Buras
, Björn Duling
, Katrin Gemmler

Chair of Theoretical Elementary Particle Physics

Technical University of Munich
Max-Planck-Institut für Physik

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

We present the electroweak and flavour structure of a model with a warped extra dimension and the bulk gauge group SU(3) _c × SU(2) _L × SU(2) _R × P _LR × U(1) _X. The presence of SU(2) _R implies an unbroken custodial symmetry in the Higgs system allowing to eliminate large contributions to the T parameter, whereas the P _LR symmetry and the enlarged fermion representations provide a custodial symmetry for flavour diagonal and flavour changing couplings of the SM Z boson to left-handed down-type quarks. We diagonalise analytically the mass matrices of charged and neutral gauge bosons including the first KK modes. We present the mass matrices for quarks including heavy KK modes and discuss the neutral and charged currents involving light and heavy fields. We give the corresponding complete set of Feynman rules in the unitary gauge.

Original language	English
Article number	064
Journal	Journal of High Energy Physics
Volume	2009
Issue number	9
DOIs	https://doi.org/10.1088/1126-6708/2009/09/064
State	Published - 2009

Keywords

Beyond standard model
Technicolor and composite models

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10.1088/1126-6708/2009/09/064

Cite this

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title = "Electroweak and flavour structure of a warped extra dimension with custodial protection",

abstract = "We present the electroweak and flavour structure of a model with a warped extra dimension and the bulk gauge group SU(3) c {\texttimes} SU(2) L {\texttimes} SU(2) R {\texttimes} P LR {\texttimes} U(1) X. The presence of SU(2) R implies an unbroken custodial symmetry in the Higgs system allowing to eliminate large contributions to the T parameter, whereas the P LR symmetry and the enlarged fermion representations provide a custodial symmetry for flavour diagonal and flavour changing couplings of the SM Z boson to left-handed down-type quarks. We diagonalise analytically the mass matrices of charged and neutral gauge bosons including the first KK modes. We present the mass matrices for quarks including heavy KK modes and discuss the neutral and charged currents involving light and heavy fields. We give the corresponding complete set of Feynman rules in the unitary gauge.",

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T1 - Electroweak and flavour structure of a warped extra dimension with custodial protection

AU - Albrecht, Michaela E.

AU - Blanke, Monika

AU - Buras, Andrzej J.

AU - Duling, Björn

AU - Gemmler, Katrin

PY - 2009

Y1 - 2009

N2 - We present the electroweak and flavour structure of a model with a warped extra dimension and the bulk gauge group SU(3) c × SU(2) L × SU(2) R × P LR × U(1) X. The presence of SU(2) R implies an unbroken custodial symmetry in the Higgs system allowing to eliminate large contributions to the T parameter, whereas the P LR symmetry and the enlarged fermion representations provide a custodial symmetry for flavour diagonal and flavour changing couplings of the SM Z boson to left-handed down-type quarks. We diagonalise analytically the mass matrices of charged and neutral gauge bosons including the first KK modes. We present the mass matrices for quarks including heavy KK modes and discuss the neutral and charged currents involving light and heavy fields. We give the corresponding complete set of Feynman rules in the unitary gauge.

AB - We present the electroweak and flavour structure of a model with a warped extra dimension and the bulk gauge group SU(3) c × SU(2) L × SU(2) R × P LR × U(1) X. The presence of SU(2) R implies an unbroken custodial symmetry in the Higgs system allowing to eliminate large contributions to the T parameter, whereas the P LR symmetry and the enlarged fermion representations provide a custodial symmetry for flavour diagonal and flavour changing couplings of the SM Z boson to left-handed down-type quarks. We diagonalise analytically the mass matrices of charged and neutral gauge bosons including the first KK modes. We present the mass matrices for quarks including heavy KK modes and discuss the neutral and charged currents involving light and heavy fields. We give the corresponding complete set of Feynman rules in the unitary gauge.

KW - Beyond standard model

KW - Technicolor and composite models

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DO - 10.1088/1126-6708/2009/09/064

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AN - SCOPUS:70350009619

SN - 1126-6708

VL - 2009

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 9

M1 - 064

ER -

Electroweak and flavour structure of a warped extra dimension with custodial protection

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Keywords

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