Recent content by nidnus

Doesn't really matter. The integral is as stated above. If you want to you can think about it as phi four theory in 2D.

Hi, Can anyone point me to a reference where the complete amplitude for a sunrise diagram in 2D with generally different masses is written down. That is, I want the value of the following integral $$ \int d^2k d^2l \frac{1}{(k^2-m_1^2)(l^2-m_2^2)((p-k-l)^2-m_3^2)} $$ where p is the...

Hi Chris, Thanks for your answer. Indeed, the terms I find correspond to mass renormalization. However, I would expect ##\delta m^2 ## to be zero since its a susy model. What is more, the ##\delta m^2## in hard cutoff is different for boson and fermions implying that susy is broken which should...

Hi everyone, I have a 2D sigma model with supersymmetry on the worldsheet. It has both cubic and quartic interactions and I'm interested in the one loop correction to the worldsheet masses. When I calculate this with dimensional regularization I find that everything is zero as expected. In...