Symmetries and spectroscopy

These lecture notes cover two largely distinct topics. Firstly there are the transformations and symmetries of space and time, namely translations, rotations, Lorentz boosts, space and time reversal and charge conjugation as operating on particles and their interactions. Secondly there is the structure of hadrons as composites of quarks (and gluons), largely treated through the building up and classification of explicit quark wave functions. These two topics have some methodological overlap in the unitary group transformations which express the exact colour symmetry of the quarks and gluons as well as those which express what approximate flavour symmetry (such as isospin) exists at the hadron level. (author)