caf::SRTrueInteraction Class Reference

True interaction of probe particle with detector. Usually neutrinos, but occasionally cosmics etc. More...

#include <SRTrueInteraction.h>

Public Attributes
long int	id = -1
long int	genieIdx = -1
int	pdg = 0
	PDG code of probe particle.
int	pdgorig = 0
	Initial (unoscillated) PDG code of probe neutrino (may be different than pdg if this file is a 'swap' file)
bool	iscc = false
	CC (true) or NC/interference (false)
ScatteringMode	mode = ScatteringMode::kUnknownMode
	Interaction mode.
int	targetPDG = 0
	PDG code of struck target.
int	hitnuc = 0
float	removalE = NaN
	energy expended to remove nucleon from the nucleus, from GENIE
float	E = NaN
	True energy [GeV].
SRVector3D	vtx
	Interaction vertex position in detector coord. [cm].
SRVector3D	momentum
	Neutrino three-momentum.
bool	isvtxcont = false
	Is true vertex is within detector? If not, might be a rock particle or cosmic.
float	time = NaN
	True interaction time.
float	bjorkenX = NaN
	Bjorken x = (k-k')^2/(2*p.q) = Q^2/(2*Mnuc*q0) [Dimensionless].
float	inelasticity = NaN
	Inelasticity y = (p.q) / (k.p) = q0 / Enu.
float	Q2 = NaN
	Invariant four-momentum transfer from lepton to nuclear system, Q^2 = -(nu - lep)^2.
float	q0 = NaN
	Energy transferred from lepton to nuclear system (in lab frame)
float	modq = NaN
	Magnitude of three-momentum transferred from lepton to nuclear system, |q| (in lab frame)
float	W = NaN
	Hadronic invariant mass W [GeV^2]. "Experimental W" in GENIE parlance, W^2 = M^2 + 2*Mnuc*q0 +|q|^2.
float	t = NaN
	Kinematic t.
bool	ischarm = false
	Did neutrino scatter from a charmed quark?
bool	isseaquark = false
	Did neutrino scatter from a sea quark?
int	resnum = 0
	Resonance number, straight from GENIE.
float	xsec = NaN
	xsec for thrown interaction, in 1/GeV^2, straight from GENIE
float	genweight = NaN
	Weight, if any, assigned by the generator.
float	baseline = NaN
	Distance from decay to interaction [m].
SRVector3D	prod_vtx
	Neutrino production vertex [cm; beam coordinates].
SRVector3D	parent_dcy_mom
	Neutrino parent momentum at decay [GeV; beam coordinates].
int	parent_dcy_mode = -1
	Parent hadron/muon decay mode.
int	parent_pdg = 0
	PDG Code of parent particle ID.
float	parent_dcy_E = NaN
	Neutrino parent energy at decay [GeV].
float	imp_weight = NaN
	Importance weight from flux file.
Generator	generator = Generator::kUnknownGenerator
	The generator that created this neutrino interaction.
std::vector< unsigned int >	genVersion
	Version of the generator that created this neutrino interaction.
int	nproton = 0
	number of (post-FSI) primary protons
int	nneutron = 0
	number of (post-FSI) primary neutrons
int	npip = 0
	number of (post-FSI) primary pi+
int	npim = 0
	number of (post-FSI) primary pi-
int	npi0 = 0
	number of (post-FSI) primary pi0
int	nprim = 0
	Number of primary particles (helps SRProxy)
std::vector< SRTrueParticle >	prim
	Primary p. The lepton always comes first in this vector.
int	nprefsi = 0
	How many primary particles there were prior to FSI (helps SRProxy)
std::vector< SRTrueParticle >	prefsi
	Primary particles prior to FSI.
int	nsec = 0
	How many secondaries are in this vector? (helps SRProxy)
std::vector< SRTrueParticle >	sec
	Secondary particles. Note that not all secondaries are kept, only those used in the reco branches.
float	xsec_cvwgt = NaN
	Central value weight for cross section model.

Static Private Attributes
static constexpr float	NaN = std::numeric_limits<float>::signaling_NaN()

Detailed Description

True interaction of probe particle with detector. Usually neutrinos, but occasionally cosmics etc.

Member Data Documentation

genieIdx

long int caf::SRTrueInteraction::genieIdx = -1

Index of interaction in GENIE tree. Note: for ND, check id to determine whether it's the tree for contained nus (<1e9) or rock/hall nus (>1e9)

hitnuc

int caf::SRTrueInteraction::hitnuc = 0

PDG code of struck nucleon (or, in the case of MEC, struck nucleon-nucleon pair). For MEC, the codes are: 2000000200 --> nn, 2000000201 --> np, 2000000202 --> pp

id

long int caf::SRTrueInteraction::id = -1

Interaction ID == 'vertexID' from edep-sim (ND) or GENIE record id (FD). In the ND case, the packing of the VertexID is described in https://github.com/DUNE/2x2_sim/wiki/Production-changes-and-validation-finding

---

The documentation for this class was generated from the following file:

• duneanaobj/StandardRecord/SRTrueInteraction.h