The process e+e- --> W+W- provides a valuable laboratory to test the StandardModel (SM) and to search for new physics. The most general helicity amplitudesfor this process require the introduction of nine form-factors which wecalculate in the context of SU(2) X U(1) gauge-invariant extensions of the SM.The contributions of new physics are parametrized via an effective Lagrangianconstructed from the light fields. Because the mechanism of electroweaksymmetry-breaking remains an open problem we consider both the effectiveLagrangian with a linearly realized Higgs sector, i.e. with a light physicalHiggs boson, and the effective Lagrangian which utilizes a nonlinearrealization of the Higgs mechanism. The use of an effective Lagrangian allowsone to calculate consistently nonstandard contributions to e+e- --> W+W-amplitudes as well as the nonstandard contributions to other processes. Westudy the interplay of the low-energy and Z-pole measurements with measurementsvia the processes e+e- --> fermion pairs and e+e- --> W+W- at LEP II or afuture linear e+e- collider. Concrete relationships between operators of thelinear and nonlinear realizations are presented where possible.
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机译：e + e--> W + W-过程提供了一个有价值的实验室，用于测试StandardModel（SM）并寻找新的物理学。此过程最一般的螺旋振幅需要引入九个形状因数，这些形状因数在SM的SU（2）XU（1）尺度不变扩展的情况下计算得出。新物理学的贡献是通过有效拉格朗日方程构造的，该拉格朗日方程由光场。因为电弱对称破坏的机理仍然是一个悬而未决的问题，所以我们既考虑具有线性实现的希格斯扇形（即具有轻物理希格斯玻色子）的有效拉格朗日，也考虑利用希格斯机制的非线性实现的有效拉格朗日。使用有效的拉格朗日函数可以计算出对e + e-> W + W幅度的一致非标准贡献，以及对其他过程的非标准贡献。通过LEP II或未来线性e + e-collider的过程e + e->费米子对和e + e-> W + W-的过程，验证了低能和Z极测量与测量之间的相互作用。在可能的地方，给出了线性和非线性实现的算子之间的具体关系。
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