Electroweak Chiral Lagrangian from TC2 Model with nontrivial TC fermion condensation and walking

Details Electroweak Chiral Lagrangian from TC2 Model with nontrivial TC fermion condensation and walking Electroweak Chiral Lagrangian from TC2 Model with nontrivial TC fermion condensation and walking

2011-02-17

arxiv.org/abs/1102.3557v3

Phys.Rev.D84:015009,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

52 pages, 27 figures

Scientific paper

10.1103/PhysRevD.84.015009

The electroweak chiral Lagrangian for the topcolor assisted technicolor model proposed by K. Lane, which uses nontrivial patterns of techniquark condensation and walking, was investigated in this study. We found that the features of the model are qualitatively similar to those of Lane's previous natural TC2 prototype model, but there is no limit on the upper bound of the Z' mass. We discuss the phase structure and possible walking behavior of the model. We obtained the values of all coefficients of the electroweak chiral Lagrangian up to an order of p4. We show that although the walking effect reduces the S parameter to half its original value, it maintains an order of 2. Moreover, a special hyper-charge arrangement is needed to achieve further reductions in its value.

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