TY - JOUR
T1 - Soft Yukawa couplings in supersymmetric theories
AU - Borzumati, Francesca
AU - Farrar, Glennys R.
AU - Polonsky, Nir
AU - Thomas, Scott
N1 - Funding Information:
The authors thank A. Djouadi, C. Greub, H. Haber, U. Nierste, G.J. van Oldenborgh, and D. Wyler for discussions, and M. Dress for comments on the manuscript. F.B. and S.T. acknowledge the hospitality of the high-energy group at Rutgers University and N.P. that of the CERN theory group. F.B., N.P., and S.T. are also grateful to the Aspen Center for Physics, where parts of this work were done. F.B. and G.E respectively acknowledge the support of the Schweizerischer Nationalfonds and Rutgers University throughout most of this research. This work was supported by the US Department of Energy under grant DE-FG02-96ER40559, the US National Science Foundation under grants PHY-94-23002 and PHY-98-70115, the Alfred P. Sloan Foundation, and Stanford University through a Fredrick E. Terman Fellowship.
PY - 1999/8/23
Y1 - 1999/8/23
N2 - The possibility of radiatively generated fermion masses arising from chiral flavor violation in soft supersymmetry-breaking terms is explored. Vacuum stability constraints are considered in various classes of models, and allow in principle all of the first-and second-generation quarks and leptons and the b-quark to obtain masses radiatively. Radiatively induced Higgs-fermion couplings have non-trivial momentum-dependent form factors, which at low momentum are enhanced with respect to the case of tree-level Yukawa couplings. These form factors may be probed by various sum rules and relations among Higgs boson decay widths and branching ratios to fermion final states. An apparent, large, hard violation of supersymmetry also results for Higgsino couplings. Mixing between left-and right-handed scalar superpartners is enhanced. A radiative muon mass is shown to lead to a relatively large and potentially measurable contribution to the muon anomalous magnetic moment. If the light-quark masses arise radiatively, the neutron electric dipole moment is suppressed by a natural phase alignment between the masses and dipole moment, and is below the current experimental bound. The possibility of neutrino masses arising from softly broken lepton number, and concomitant enhanced sneutrino-antisneutrino oscillations, is briefly discussed.
AB - The possibility of radiatively generated fermion masses arising from chiral flavor violation in soft supersymmetry-breaking terms is explored. Vacuum stability constraints are considered in various classes of models, and allow in principle all of the first-and second-generation quarks and leptons and the b-quark to obtain masses radiatively. Radiatively induced Higgs-fermion couplings have non-trivial momentum-dependent form factors, which at low momentum are enhanced with respect to the case of tree-level Yukawa couplings. These form factors may be probed by various sum rules and relations among Higgs boson decay widths and branching ratios to fermion final states. An apparent, large, hard violation of supersymmetry also results for Higgsino couplings. Mixing between left-and right-handed scalar superpartners is enhanced. A radiative muon mass is shown to lead to a relatively large and potentially measurable contribution to the muon anomalous magnetic moment. If the light-quark masses arise radiatively, the neutron electric dipole moment is suppressed by a natural phase alignment between the masses and dipole moment, and is below the current experimental bound. The possibility of neutrino masses arising from softly broken lepton number, and concomitant enhanced sneutrino-antisneutrino oscillations, is briefly discussed.
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U2 - 10.1016/S0550-3213(99)00328-4
DO - 10.1016/S0550-3213(99)00328-4
M3 - Article
AN - SCOPUS:0033598060
SN - 0550-3213
VL - 555
SP - 53
EP - 115
JO - Nuclear Physics B
JF - Nuclear Physics B
IS - 1-2
ER -