Fermion Definition and 104 Threads

Is a baryonium baryon or meson? For example, deutorium, a n-p bound-state, has total spin 0 pr 1, so it is boson, then, it is meson? But it has baryon number (3+3)/3=2. For another example, bound-state of \Lambda_c - \bar{\Lambda_c}, has total spin 0 or 1, so again it is boson, it is meson...

Since we have anticommuting relations for the quantum Dirac fields, this will bring us to the similar classical correspondance but result in Grassmann spinor field function instead. (such as path integral) So when we consider an arbitrary interaction term that like (\bar{\psi} \psi)^n, if...

an atom consists of an electron (spin 1/2) and a positively charged spin 2 particle at the nucleus (in place of the proton). is this 'atom' a boson or a fermion?

One thing is bothering me from "the beginning". Let's take one fermion. It has spin, charge and mass (of course). This particle is surrounded with static magnetic field (becouse of it's spin), and with static electric field (becouse of it's charge). Both field (separately) are...