Percussion notes may be entered in \drummode
mode, which is
similar to the standard mode for entering notes. Each piece of
percussion has a full name and an abbreviated name, and both can be used
in input files
\drums { hihat hh bassdrum bd }
The complete list of drum names is in the init file ly/drumpitch-init.ly.
Program reference: note-event.
This page is for LilyPond-2.6.3 (stable-branch).