Test of the Heavy Top Expansion in the Evaluation of MW and sin^2theta_eff

Details Test of the Heavy Top Expansion in the Evaluation of MW and sin^2theta_eff Test of the Heavy Top Expansion in the Evaluation of MW and sin^2theta_eff

1999-03-03

arxiv.org/abs/hep-ph/9903249v1

JHEP 9904 (1999) 025

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figure

Scientific paper

10.1088/1126-6708/1999/04/025

In order to test the accuracy of the Heavy Top-mass Expansion (HTE) employed in recent two-loop calculations of MW and sin^2theta_eff, we consider their contributions to subtracted quantities of the form MW_sub=MW(mh)-MW(mh0), where mh0 is a reference point. The results are compared with those obtained by a precise numerical evaluation of all the two-loop contributions involving both the Higgs boson and a fermion loop. For the choice mh0=65 GeV, and over the large range 65 GeV

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