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Indirect methods for determining heavy-neutrino masses

机译:间接测定重中微子质量的方法

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Within the two-flavor approximation, equations that relate the oscillation parameters for both light and heavy neutrinos to the Yukawa coupling constants and the Vacuum expectation values of the Higgs fields are derived within the left-right model. The contributions from Higgs bosons to the muon anomalous magnetic moment, to the cross sections for lepton-flavor-violating processes, and to the cross sections for low-energy light-neutrino scattering are Studied in order to determine the Yukawa coupling constants. It is shown that the heavy-neutrino masses mN(1,2) can be expressed in terms of only the triplet Yukawa Coupling constants and the mass of the gauge boson W-2. Data on direct and inverse muon decay and constraints on the masses of the (delta) over bar(-), Delta(1,2)((--)), and W-2 bosons are used to obtain bounds on m(N1,2), both in the absence of degeneracy and in the presence of mass degeneracy in the sector of heavy neutrinos. Only in the case of degeneracy are data concerning the explanation of the (g - 2)(mu) anomaly used to determine bounds on m(N,1,2). (C) 2005 Pleiades Publishing, Inc.
机译:在二味近似中,将轻中微子和重中微子的振荡参数与汤川耦合常数相关联的方程式,并在左右模型中导出了希格斯场的真空期望值。为了确定汤河耦合常数,研究了希格斯玻色子对μ子异常磁矩,对违反轻子味的过程的截面以及对低能光中微子散射的截面的贡献。结果表明,重中微子质量mN(1,2)只能用三重态汤川耦合常数和标准玻色子W-2的质量表示。关于bar(-),Delta(1,2)((-))和W-2玻色子的直接和反向μ子衰变数据以及对δ质量的约束,用于获得m(N1)的边界,2),在重中微子领域既不存在简并又存在大规模简并。仅在简并的情况下,才涉及用于确定m(N,1,2)范围的(g-2)(mu)异常的解释的数据。 (C)2005年Pleiades Publishing,Inc.

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