Common integrals in quantum field theory: Difference between revisions

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for the two eigenvectors. Here {{mvar|η}} is a normalizing factor given by

<math display="block">\eta = \sqrt{1 + \left(\frac{a - \lambda_{-}}{c} \right)^2 } = \sqrt{1 + \left(\frac{b - \lambda_{+}}{c} \right)^2}.</math>

It is easily verified that the two eigenvectors are orthogonal to each other.