Warped/composite phenomenology simplified

This is the first of two papers aimed at economically capturing the colliderphenomenology of warped extra dimensions with bulk Standard Model fields, wherethe hierarchy problem is solved non-supersymmetrically. This scenario isrelated via the AdS/CFT correspondence to that of partial compositeness of theStandard Model. We present a purely four-dimensional, two-sector effectivefield theory describing the Standard Model fields and just their firstKaluza-Klein/composite excitations. This truncation, while losing some of theexplanatory power and precision of the full higher-dimensional warped theory,greatly simplifies phenomenological considerations and computations. Wedescribe the philosophy and explicit construction of our two-sector model, andalso derive formulas for residual Higgs fine tuning and electroweak and flavorprecision variables to help identify the most motivated parts of the parameterspace. We highlight several of the most promising channels for LHC exploration.The present paper focusses on the most minimal scenario, while the companionpaper addresses the even richer phenomenology of the minimal scenario ofprecision gauge coupling unification.Comment: 41 pages, 8 figures. v2: minor corrections, a few comments and one reference added. v3: minor errors in eq.(32), (42) and (58) corrected, conclusions unchange