SUMMARY
A Lagrangian is considered renormalizable if it includes only triple and quadruple vertices or a maximum of four powers of the fields. The renormalizability of a theory is contingent upon the dimensionality of the fields involved. For instance, a 4-fermion interaction, exemplified by the Fermi theory of weak interactions, is definitively non-renormalizable. Standard references for further reading include the textbook "An Introduction to Quantum Field Theory" by Peskin & Schröder.
PREREQUISITES
- Understanding of Quantum Field Theory (QFT)
- Familiarity with Lagrangian mechanics
- Knowledge of renormalization concepts
- Basic grasp of particle interactions and dimensional analysis
NEXT STEPS
- Study the renormalization process in Quantum Field Theory
- Read "An Introduction to Quantum Field Theory" by Peskin & Schröder
- Explore the implications of dimensionality on field theories
- Investigate examples of non-renormalizable interactions in QFT
USEFUL FOR
Physicists, particularly those specializing in theoretical physics, quantum field theorists, and students seeking to deepen their understanding of renormalization and particle interactions.