hi, my notes say that a meson is a quark anti quark pair and that all quarks are spin half fermions. fair enough. it then says that mesons are bosons with spin [itex]0, 1 \hbar, 2 \hbar \dots [/itex] this i don't get. apparantly, antimatter has the same mass, opposite electric charge and also the opposite of any additive quantum number of its corresponding matter particle. spin is an additive quantum number so surely this means that all antiquarks have spin -1/2 therefore the total spin of the meson is either 1 or 0 (by the angular momentum addition theorem). how would it ever be possible to have a meson with spin 2 for example? or are my notes wrong here? thanks.