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OK so it's not a question of normalization. My confusion arose because of naïvety. $$\tag{1} u^{(r)\dagger}u^{(s)} = 2E\delta_{rs}$$ $$\tag{2} {\bar{u}^{(s)}}u^{(s)} = 2m.$$ Since the normalization relations $(1)$ and $(2)$ applies to same momenta spinors i.e. $\bar{u}(p)[\cdots]u(p)$ and so on. If one is not as lazy as me, one can easily derive the ...


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In general, bound states in lattice QCD are found by analyzing correlation functions of operators with the appropriate quantum numbers. This works both for baryons and mesons, even for pure-glue states like glueballs. See for example these introductory lecture notes: http://arxiv.org/abs/hep-lat/9807028. Chapter 17 should answer your questions in more ...



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