Graduate Understanding Counter Term Renormalization in Quantum Field Theory

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Counter term renormalization in quantum field theory (QFT) is essential for addressing infinities in loop calculations. The discussion highlights that inserting mass counter terms in one-loop diagrams is equivalent to taking the derivative of the diagram multiplied by the mass counter term. Reference materials, including a QFT manuscript and Mccomb's textbook, provide further insights into perturbative renormalization theory and the renormalization group. The importance of understanding different renormalization schemes is emphasized, particularly in relation to defining counter terms. This foundational knowledge is crucial for anyone studying QFT.
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Currently, I am reading about counter term renormalization used to eliminate the infinities in the loop calculations involved in QFT calculations. I found somewhere that the insertion of mass counter terms in one loop diagrams is equivalent to the derivative of one loop diagram multiplied with mass counter term. I am not getting this point.. If anybody can help me with that it would be very helpful.. Thanks..
For reference : arXiv:hep-ph/9406431 equation no. (3.6 ) in this..
Currently, I am reading about counter term renormalization used to eliminate the infinities in the loop calculations involved in QFT calculations. I found somewhere that the insertion of mass counter terms in one loop diagrams is equivalent to the derivative of one loop diagram multiplied with mass counter term. I am not getting this point.. If anybody can help me with that it would be very helpful.. Thanks..
For reference : arXiv:hep-ph/9406431 equation no. (3.6 ) in this..
 

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Have a look at my QFT manuscript:

https://itp.uni-frankfurt.de/~hees/publ/lect.pdf

In Chpt. 5 you find perturbative renormalization theory. The discussion of different renormalization schemes and how the derivatives wrt. mass to define the counter terms come into the game is in Sect. 5.11 about the renormalization group.
 
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vanhees71 said:
Have a look at my QFT manuscript:

https://itp.uni-frankfurt.de/~hees/publ/lect.pdf

In Chpt. 5 you find perturbative renormalization theory. The discussion of different renormalization schemes and how the derivatives wrt. mass to define the counter terms come into the game is in Sect. 5.11 about the renormalization group.
Thanks... I will surely take a look...
 
Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?

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