Currently partially copied from NOvA's CAF File Structure wiki. This will be updated over time but eventually Doxygen will be a better resource as it'll be should be up to date.

The StandardRecord provides the structure for the object that make up the SBN Ana Files.

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The header branch is called "hdr." It contains information helpful in identifying the slice and event.

Type	Variable Name	Short description
unsigned int	run	run number
unsigned int	subrun	subrun number
unsigned int	evt	art event number
unsigned short	subevt	slice number within spill
bool	ismc	MC = true, data = false
Det_t	det	detector: 1 = SBND, 2 = MicroBooNE, 3 = ICARUS

The slice branch is called "slc." This branch stores variables resulting from the slicer module. Slicer is designed to cluster hits in time.

Type	Variable Name	Short description
unsigned int	id
float	charge
TVector3	vertex	vertex position in detector coordinates [cm]

The track branch, named "trk," contains multiple vectors of SRTrack objects. These objects are sorted by descending track length; i.e. the longest track comes first and the shortest track comes last. (@check@)

Type	Variable Name	Short description
TVector3	start	start position in detector coordinates [cm]
TVector3	end	end position in detector coordinates [cm]
float	len	track length [cm]
std::vector

The shower branch, named "shw," contains multiple vectors of SRShower objects.

Type	Variable Name	Short description
int	bestplane	best reconstructed plane: 1= , 2 =, 3 =,
float	density	density = best shower energy / best shower length [MeV/cm]
float	len	length [cm]
float	energy	energy [MeV]
float	open_angle	opening angle [rad]
std::vector	dEdx	calculated didx at each plane []
std::vector	energy	calculated didx at each plane [MeV]
SRVector3D	dir	direction cosines at the start of the shower
SRVector3D	start	start point in detector coordinates [cm]