Wednesday, July 17, 2013

1307.4226 (Fred Jegerlehner et al.)

About the EW contribution to the relation between pole and MS-masses of
the top-quark in the Standard Model

Fred Jegerlehner, Mikhail Yu. Kalmykov, Bernd A. Kniehl
Results of our recent re-analysis of the electroweak contribution to the relation between pole and running masses of top-quark within the Standard Model is reviewed. We argue, that if vacuum of SM is stable, then there exists an optimal value of renormalization group scale (IR-point), at which the radiative corrections to the matching condition between parameters of Higgs sector and pole masses is minimal or equal to zero. Within the available accuracy, we find the IR-point to lie in an interval between value of Z-boson mass and twice the value of W-boson mass. The value of scale is relevant for extraction of Higgs self-coupling from cross-section as well as for construction of effective Lagrangian.
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