A Feynman diagram showing sigma decay. I had used this diagram in One of my particle Physics homework.  ```tex \begin{tikzpicture} …
A feynman diagram for neutrinoless double beta decay $0\nu\beta\beta$. Refer to [this better version](./0nbb)  ```tex \begin{tikzpicture} …
A feynman diagram for neutrinoless double beta decay $0\nu\beta\beta$. Time obviously points upwards rather than sideways from left to right. As my professor said, "I don't understand why people …
A feynman diagram for two neutrino double beta decay $2\nu\beta\beta$. Time obviously points upwards rather than sideways from left to right. As my professor said, "I don't understand why people …