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The Minimal Set of Electroweak Precision Parameters | | G. Cacciapaglia
; C. Csáki
; G. Marandella
; A. Strumia
; | | Date: |
12 Apr 2006 | | Abstract: | We present a simple method for analyzing the impact of precision electroweak data above and below the Z-peak on flavour-conserving heavy new physics. We find that experiments have probed about ten combinations of new physics effects, which to a good approximation can be condensed into the effective oblique parameters Shat, That, Uhat, V, X, W, Y (we prove positivity constraints W, Y >= 0) and three combinations of quark couplings (including a distinct parameter for the bottom). We apply our method to generic extra Z’ vectors. | | Source: | arXiv, hep-ph/0604111 | | Services: | Forum | Review | PDF | Favorites | |
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