RichPID doxygen

Contains the Particle Identification information for the RICH detectors.

Data members are :-

• A smart reference to the associated track object. Currently some gymnastics are performed to allow this to be either a TrStoredTrack or a TrgTrack. Eventually, this will be simplified when only one track object is in use.

• A bit packed history code. Contains some information on how the PID result was produced (For example, which radiators were available for the associated track, and which algorithm was used).

• A vector of floats containing the delta log likelihood values (defined to be with respect to the best hypothesis) for each of the 5 mass hypotheses. Users are discouraged from accessing this vector directly but instead should use the accessor methods provided.

• The best mass hypothesis. Internally it is stored as an integer but is converted into an enumeration in the acces methods.