UBXSec Tree Variables

This page describes the variables that are stored in the UBXSec tree.

Please find the most up-to-date version here.

General

These are general variables relative to each event.

Type	Name	Description
int	run	Run number
int	subrun	Subrun number
int	event	Event number
int	fv	Is 1 is the true neutrino vertex is in the fiducial volume
int	ccnc	Is 0 if CC, 1 if NC
int	nupdg	Neutrino flavour (pdg code)
double	nu_e	Neutrino energy

TPCObject Information

Information are saved in a vector. Each entry of a vector is one TPCObject. TPCObject is basically one reconstructed object, it can be on cosmic track with its delta rays, or a neutrino-induced muon track together with other proton tracks coming out from the neutrino interaction. In an event selection, you would take one event, then loop over the TPCObjects in the vector to see if one of those is a potential neutrino candidate.

Type	Name	Description
int	nslices	Number of TPCObjects in the event
std::vector<double>	slc_origin	Origin of the slice (0: neutrino, 1: cosmic, 2: mixed)
std::vector<double>	slc_flsmatch_score	Flash matching score (-9999 means failed to match)
std::vector<double>	slc_flsmatch_qllx	Estimated X position given by flash matching
std::vector<double>	slc_flsmatch_tpcx	TPC X position given by the flash time
std::vector<double>	slc_flsmatch_hypoz	Z center of the hypothesis flash
std::vector<double>	slc_nuvtx_x(y,z)	Reconstructed neutrino vertex (cm)
std::vector<double>	slc_longesttrack_length	Length of the longest track in the TPCObject
std::vector<double>	slc_longesttrack_phi	Phi angle of the longest track in the TPCObject
std::vector<double>	slc_longesttrack_theta	Theta angle of the longest track in the TPCObject
std::vector<bool>	slc_longesttrack_iscontained	True if the longest track in the TPCObject is contained
std::vector<bool>	slc_iscontained	True if the whole TPCObject is contained
std::vector<int>	slc_npfp	Number of PFParticles in the TPCObject
std::vector<int>	slc_ntrack	Number of Tracks in the TPCObject
std::vector<int>	slc_nshower	Number of Showers in the TPCObject
std::vector<int>	slc_mult_pfp	Multiplicity in terms of number of PFParticles
std::vector<int>	slc_mult_track	Multiplicity in terms of number of Tracks
std::vector<int>	slc_mult_shower	Multiplicity in terms of number of Shower
std::vector<int>	slc_mult_track_tolerance	Multiplicity in terms of number of Tracks close to 5cm to reco nu vtx.

Example

Print the flash matching score for each TPCObject in one event

for (size_t tpc_obj = 0; tpc_obj < nslices; tpcobj++) {

  std::cout << "TPCObject " << tpc_obj << ", flash matching score is " << slc_flsmatch_score.at(tpc_obj) << std::endl;

}

Flash information

Information are saved in a vector. To select the beam flash used for flash matching, use a time window of [3.2, 4.8] us. If there are more than two flashes in this window, reject the event.

Type	Name	Description
int	nbeamfls	Number of beam flashes in the event
std::vector<double>	beamfls_time	Time of the beam flash
std::vector<double>	beamfls_pe	PE of the beam flash
std::vector<double>	beamfls_z	Z centre of the beam flash