- #1
earth2
- 86
- 0
Hi folks,
I just read some stuff about Susy and encountered superfields and their expansion in terms of the supercoords [tex]x^\mu, \theta, \bar{\theta}[/tex]. Reading that (e.g. in the script of Lykken), I found general expansions like
[tex]S(x,\theta,\bar{\theta})=...+ \theta\theta \psi + ...+\theta\theta\bar{\theta}\bar{\theta} D[/tex]
But how can terms quadratic in theta/theta bar appear if theta and theta bar are grassmann numbers? Their square should vanish!
I don't get it and any help would be appreciated :)
Thanks,
earth2
I just read some stuff about Susy and encountered superfields and their expansion in terms of the supercoords [tex]x^\mu, \theta, \bar{\theta}[/tex]. Reading that (e.g. in the script of Lykken), I found general expansions like
[tex]S(x,\theta,\bar{\theta})=...+ \theta\theta \psi + ...+\theta\theta\bar{\theta}\bar{\theta} D[/tex]
But how can terms quadratic in theta/theta bar appear if theta and theta bar are grassmann numbers? Their square should vanish!
I don't get it and any help would be appreciated :)
Thanks,
earth2