Solving Problem 10.3 from Peskin's QFT Book

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The forum discussion focuses on solving Problem 10.3 from Peskin's "An Introduction to Quantum Field Theory," specifically evaluating the 2-loop sunset diagram in massless φ⁴ theory. The user is encountering difficulties with integrating over the second loop using standard Feynman parameter and dimensional regularization techniques. Another participant suggests posting the troublesome integral and inquires about the use of generalized zeta Riemann regularization as a potential solution.

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phinlamp
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Hi,

I'm stuck with problem 10.3 from Peskin's QFT book. I'm trying to evaluate the 2-loop sunset diagram in massless phi^4 theory however I keep running into trouble. I'm trying to use standard feynman parameter + dimensional regularisation techniques however i keep getting stuck when it comes to integrating over the 2nd loop.

Can anyone help me?

Phin
 
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How about you post the integral which gives u headaches...?Do u use a generalized zeta Riemann regularization...?

Daniel.
 

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