Both "Quantum Field Theory" by Mark Srednicki and "An Introduction to Quantum Field Theory" by Michael E. Peskin and Daniel V. Schroeder are widely recognized as excellent textbooks for studying quantum field theory (QFT). However, the choice between them depends on your background, learning style, and personal preferences.
Srednicki's book, "Quantum Field Theory," is known for its clear and comprehensive approach to teaching QFT. It covers a wide range of topics, including classical field theory, canonical quantization, path integrals, renormalization, and more advanced concepts like spontaneous symmetry breaking. Srednicki's explanations are detailed and his writing style is accessible, making it a popular choice for self-study.
On the other hand, Peskin and Schroeder's book, "An Introduction to Quantum Field Theory," is often considered a standard reference for learning QFT at the graduate level. It provides a thorough treatment of essential topics in QFT, such as Feynman diagrams, gauge theories, renormalization, and the Standard Model. It also includes many detailed calculations and exercises that help build a solid understanding of the subject. The book assumes a solid background in quantum mechanics and special relativity.
In summary, both books are highly regarded and have their own strengths. If you prefer a more comprehensive and accessible approach, Srednicki's book might be a good choice. If you prefer a slightly more advanced and rigorous treatment, Peskin and Schroeder's book is a popular option. It can also be beneficial to consult both books or use them as complementary resources, depending on your needs and preferences. Ultimately, it's advisable to skim through sample chapters or reviews of both books to see which one resonates better with your learning style and background knowledge.