Effective Lagrangian for a Technicolor Model without Exact Custodial Symmetry

Details Effective Lagrangian for a Technicolor Model without Exact Custodial Symmetry Effective Lagrangian for a Technicolor Model without Exact Custodial Symmetry

1994-03-23

arxiv.org/abs/hep-ph/9403343v2

Prog.Theor.Phys. 92 (1994) 353-376

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages plus 1 table and 4 figures (7 postscript files append.), Latex, (HUPD-9406)

Scientific paper

10.1143/PTP.92.353

Effective Lagrangian including technimesons is constructed for a realistic one-family Technicolor model without exact custodial symmetry. Tree level contribution to oblique correction parameters $S$ and $U$ due to spin 1 technimesons are computed with the effective Lagrangian. An isospin breaking term which is associated with technilepton vector mesons gives a negative contribution to the electroweak radiative correction parameter $S$ due to mixing between $I=0$ and $I=1$ vector mesons. $U$ receives non-zero contribution due to exotic left-handed charged vector mesons and its sign can be both negative and positive.

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