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Scale-independent mixing angles | | J.R. Espinosa
; I. Navarro
; | | Date: |
14 Sep 2001 | | Journal: | Phys.Rev. D66 (2002) 016004 | | Subject: | hep-ph | | Abstract: | A radiatively-corrected mixing angle has to be independent of the choice of renormalization scale to be a physical observable. At one-loop in MS-bar, this only occurs for a particular value, p*, of the external momentum in the two-point functions used to define the mixing angle: p*^2=(M1^2+M2^2)/2, where M1, M2 are the physical masses of the two mixed particles. We examine two important applications of this to the Minimal Supersymmetric Standard Model: the mixing angle for a) neutral Higgs bosons and b) stops. We find that this choice of external momentum improves the scale independence (and therefore provides a more reliable determination) of these mixing angles. | | Source: | arXiv, hep-ph/0109126 | | Services: | Forum | Review | PDF | Favorites | |
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