quantum field theory - Is there a mistake in a QFT textbook

I tried to calculate one of the problems in the textbook Gauge Theory of Elementary Particle Physics by Ta-Pei Cheng and Ling-Fong Li. On page 248 you can find the following calculation of a loop

The pragmatic QFT measurement problem and the need for a Heisenberg-like cut in QFT

Quantum Field Theory, Mark Srednicki

Problems in Quantum Field Theory

These are the QFT textbooks list for beginners and advanced users. Any suggestions or textbook recommendations are very welcome. : r/QuantumPhysics

Sabine Hossenfelder: Backreaction: Book review: “The Theoretical Minimum – Quantum Mechanics” By Susskind and Friedman

Used Book in Good Condition Highlight, take notes, and search in the book In this edition, page numbers are just like the physical edition

Quantum Field Theory

Casimir effect - Wikipedia

20 Best Quantum Field Theory Books of All Time - BookAuthority

Quantum Field Theory, as Simply as Possible: Zee, Anthony: 9780691174297: : Books

Quantum Field Theory, String Theory and Predictions (Part 3) – Of Particular Significance

Quantum Field Theory ✓ Applications and Implications

Modern Functional Quantum Field Theory: Summing Feynman Graphs eBook by Herbert Martin Fried - EPUB Book