Running Fermion Masses - Institut fÃ¼r Physik

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Running Fermion Masses: above the EW scaleGoal: running fermion masses m(μ) at the TeV scale, the seesaw scaleand the GUT scale, both in the SM and in the MSSM(1) We adopt the seesaw model for neutrino masses, so neutrinos areassumed to be Majorana particles;(2) Above the EW scale, we define fermion masses as mf = yf v, where yfare the eigenvalues of Yukawa couplings and v is the vev;(3) We use two-loop RGEs for Yu, Yd, Yl, but one-loop RGE for effectiveneutrino coupling matrix κ.mq(Mz)Yu & YdMachack & Vaughn, 1984; Antusch et al.,2002, 2005; Mei & Xing, 2004; Mei, 2005GaugecouplingsYl & κθ12 = 33.8 degθ23 = 45.0 degθ13 ~ 0δ=ρ=σ = 0(A) m1 = 0.001 eV, m1 < m2 < m3(B) m1 = 0.2 eV, m1< m2 < m3
Xing, Zhang & Zhou, Phys. Rev. D 77, 113016 (2008)Mathematica code RunDec, by Chetyrkin, Kuehn & Steinhauser, 2000
Page 5 and 6: Theoretical Predictions of Fermion
Page 7 and 8: Leutwyler, arXiv: 0911.1416
Page 9 and 10: Running Fermion Masses: below the E
Page 11 and 12: Formula: (2) Matching conditions fo
Page 13: Strategy: (1) Input values from the
Page 17 and 18: Xing, Zhang & Zhou, Phys. Rev. D 77
Page 19: Summary1. The origin of fermion mas

Running Fermion Masses - Institut fÃ¼r Physik

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