Timeline for Majorana mass vs Dirac Mass
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Oct 7, 2018 at 18:17 | comment | added | tparker | The OP has asked a separate follow-up question here. | |
| May 19, 2017 at 4:15 | comment | added | Luboš Motl | Yup, that's a completely equivalent way of showing that the Majorana field has $Q=0$. Note that even your equation actually showed $2Q=0$. So a Majorana field can carry and often does carry a nontrivial charge under some $Z_2$ discrete group (or another discrete group with that subgroup). | |
| May 17, 2017 at 15:21 | comment | added | SRS | Dear @Lubos I have a question regarding U(1) charges of Majorana fields and is related to your answer. You said that if the Majorana field $\chi$ carried a charge $Q$, then the Majorana mass would violate that charge by 2Q units. I agree. However, if the field $\psi$ is assigned a charge $Q$ under some U(1), $\psi^c$ would have a charge $-Q$. Now for Majorana fields, $\psi=\psi^c$ which implies $Q=-Q\Rightarrow Q=0$. Then there is no question of violation. Am I wrong? | |
| Mar 1, 2014 at 16:30 | vote | accept | SRS | ||
| Mar 1, 2014 at 6:25 | history | answered | Luboš Motl | CC BY-SA 3.0 |