Electroweak and Flavour Structure of a Warped Extra Dimension with Custodial Protection

Details Electroweak and Flavour Structure of a Warped Extra Dimension with Custodial Protection Electroweak and Flavour Structure of a Warped Extra Dimension with Custodial Protection

2009-03-13

arxiv.org/abs/0903.2415v2

JHEP 09 (2009) 064

Physics

High Energy Physics

High Energy Physics - Phenomenology

74 pages, 2 figures. clarifying comments and references added, version to be published in JHEP

Scientific paper

We present the electroweak and flavour structure of a model with a warped extra dimension and the bulk gauge group SU(3) x SU(2)_L x SU(2)_R x P_LR x 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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