TY - JOUR

T1 - Two-loop renormalization of tan β and its gauge dependence

AU - Yamada, Youichi

N1 - Funding Information:
This work was supported in part by the Grant-in-aid for Scientific Research from Japan Society for the Promotion of Science, No. 12740131.

PY - 2002/3/28

Y1 - 2002/3/28

N2 - Renormalization of two-loop divergent corrections to the vacuum expectation values (v1, v2) of the two Higgs doublets in the minimal supersymmetric standard model, and their ratio tan β = v2/v1, is discussed for general Rξ gauge fixings. When the renormalized (v1, v2) are defined to give the minimum of the loop-corrected effective potential, it is shown that, beyond the one-loop level, the dimensionful parameters in the Rξ gauge fixing term generate gauge dependence of the renormalized tan β. Additional shifts of the Higgs fields are necessary to realize the gauge-independent renormalization of tan β.

AB - Renormalization of two-loop divergent corrections to the vacuum expectation values (v1, v2) of the two Higgs doublets in the minimal supersymmetric standard model, and their ratio tan β = v2/v1, is discussed for general Rξ gauge fixings. When the renormalized (v1, v2) are defined to give the minimum of the loop-corrected effective potential, it is shown that, beyond the one-loop level, the dimensionful parameters in the Rξ gauge fixing term generate gauge dependence of the renormalized tan β. Additional shifts of the Higgs fields are necessary to realize the gauge-independent renormalization of tan β.

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U2 - 10.1016/S0370-2693(02)01324-2

DO - 10.1016/S0370-2693(02)01324-2

M3 - Article

AN - SCOPUS:0037187754

VL - 530

SP - 174

EP - 178

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-4

ER -