Quantcast
Channel: Why does the QCD vacuum have zero momentum? - Physics Stack Exchange
Browsing latest articles
Browse All 3 View Live

Answer by AccidentalFourierTransform for Why does the QCD vacuum have zero...

@ACuriousMind 's answer is pretty straightforward. As an alternate proof consider the following:Note that $\hat P^\mu$ is time-independent$^1$, which means that it commutes with $\hat H$. So it...

View Article


Answer by ACuriousMind for Why does the QCD vacuum have zero momentum?

It's by definition. A vacuum state is defined to be Poincaré invariant, since it should not depend on the frame (in special relativistic QFT; you get frame-dependent vacua in QFT in curved...

View Article


Why does the QCD vacuum have zero momentum?

Today in the hadron physics tutorial we were talking about the Fabri-Picasso theorem where one step in the proof involves $\hat P |0\rangle$ which is the four-momentum operator on the vacuum. And from...

View Article
Browsing latest articles
Browse All 3 View Live


<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>