Abstract
We now construct an effective field theory whose Feynman rules directly yield the hard, collinear, and soft integrals for the Sudakov form factor that were considered in the previous section. Initially we restrict our discussion to the case of a scalar ϕ 3 theory. The procedure outlined in the following will be applied to QCD in Chap. 4; however, since the different components of the quark and gluon fields scale differently, the effective Lagrangian derived from QCD will look more complicated than the one that we will derive in this section for a scalar theory.
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References
M. Beneke, T. Feldmann, Multipole-expanded soft-collinear effective theory with non-abelian gauge symmetry. Phys. Lett. B553, 267–276 (2003) [hep-ph/0211358]
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Becher, T., Broggio, A., Ferroglia, A. (2015). Scalar SCET. In: Introduction to Soft-Collinear Effective Theory. Lecture Notes in Physics, vol 896. Springer, Cham. https://doi.org/10.1007/978-3-319-14848-9_3
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DOI: https://doi.org/10.1007/978-3-319-14848-9_3
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