Root Ntuple

Contents
MC
ACD
CAL
TKR
General

Reading the ntuple
Example

Item	Description
Run_Number	Run number
Event_ID	event number in file
Elapsed_Time	Event time in seconds from the start of the run.
MC_Energy	kinetic energy of incident particle
MC_LogE	log10(energy) of inc. particle
MC_Src_Id	flux generator ID
MC_xDir	x direction cosine of inc. particle
MC_yDir
MC_zDir
MC_X0	position of inc. particle.
MC_Y0
MC_Z0
MC_Gamma_Xdir_Err	difference between "gamma" fit and MC direction cosines
MC_Gamma_Ydir_Err	difference between "gamma" fit and MC direction cosines
MC_Gamma_Err	angle between incoming and fit direction

ACD

*Item*	*Description*
ACD_TotEnergy	Total energy deposited in all ACD tiles
ACD_TileCount	Number of Tiles above threshold.
ACD_Acd_Dist	New DOCA=Distance of Closest Approach calculation that determines the minimum distance between all tracks and the edge of hit tiles.
ACD_DOCA	DOCA = Distance of Closest Approach, for all tiles, using all tracks found
ACD_GammaDOCA	DOCA, for all tiles, using the reconstructed gamma trajectory
ACD_TopDOCA	DOCA, for top tiles, using all tracks found
ACD_S0DOCA... ACD_SnDOCA	DOCA for side tiles in row n, using all tracks found
ACD_No_Face0.. ACD_No_Face4	Number of hit ACD tiles (above threshold), on a particular face.
ACD_No_SideRow0... ACD_No_SideRown	Number hit ACD Tiles, above threshold, in a particular side row.
ACD_Throttle_Bits	Bits denote ACD tile type and possible track intersections. 0x0001 denotes a front tile 0x0010 denotes the first side row 0x0020 denotes the 2nd side row 0x0030 denotes the 3rd side row 0x0040 denotes the 4th side row

CAL

*Item*	*Description*
Cal_Energy_Inc_Prof
Cal_Energy_Inc_LeakCorr
Cal_Energy_Incident
Cal_Energy_Incident_CalTkr
Cal_Energy_Deposit	total energy (MeV) as reconstructed by the CAL
Cal_eLayer1- Cal_eLayer8	energy deposited (MeV) in each CAL layer
Cal_X, Cal_Y, Cal_Z	z position of the shower center...this would be equivalent to CalCluster::Position.z()?
Cal_transv_rms
Cal_long_rms
Cal_theta, Cal_phi
Cal_No_Xtals	total number of logs with any energy deposition
Cal_No_Xtals_Trunc	number of logs with an energy deposit > 1% of total energy deposited in the CAL
Cal_Xtal_ratio	derived from Cal_No_Xtals_trunc and the number of logs hit AO: computed in EnergyCorrection

TKR

*Item*	*Description*
TKR_No_Tracks	total number of tracks found by TKR recon
TKR_No_X_Trks TKR_No_Y_Trks	Number of tracks found in X and Y
TKR_NCnv_Lyr_Hits	Number of "planes" with clusters
TKR_Cnv_Lyr_Hits	Total number of clusters
TKR_Max_controller_hits	= 0 (I think)
TKR_Fst_Cnv_Lyr	"Plane" number of first clusters
TKR_Chisq	For gamma, sum of best X and Y track Xi^2
TKR_XChisq TKR_YChisq	For gamma, best track Xi^2, for X track and Y track
TKR_XChisq_1st TKR_YChisq_1st	For gamma, best track first segment Xi^2, for X and Y tracks
TKR_First_XHit	Layer number of the first hit associated with the best X track.
TKR_Zbottom	Z coordinate of the last hit (X or Y) of the Best track in the gamma
TKR_t_Angle	sin of the angle between the best track and the gamma direction.
TKR_Gamma_xdir, TKR_Gamma_ydir, TKR_Gamma_zdir	direction cosines for gamma
TKR_Gamma_x0, TKR_Gamma_y0, TKR_Gamma_z0	position (0,0,0) for the gamma currently in centimeters
TKR_Diff_1st_Hit	Difference in layer numbers between the first hit associated with the best X track and the best Y track.
TKR_Chisq_1st	For gamma, sum of best X and Y track initial segment Xi^2
TKR_Fit_Topo	Is supposed to say something about association of gamma tracks in X and Y but yet to be deciphered
TKR_Fit_Type	RC-best track : Flag indicating the type of reconstructed track:Best track = 0 Additional tracks around best track +1 Pair track +10 RC-Pair Fit : Xtracks + 10*Ytracks of the RC gamma
TKR_Fit_Kink	measure of the angle between the first couple hits in the "best" track
TKR_First_Fit_Gaps	Number of gaps of the best track initial segments
TKR_Fit_xdir, TKR_Fit_ydir, TKR_Fit_zdir	Components of the unitary directional vector of the best track.
TKR_Fit_x0, TKR_Fit_y0, TKR_Fit_z0	Coordinate of the RC initial vertex of the best track. currently in centimeters
TKR_Pair_xdir TKR_Pair_ydir TKR_Pair_zdir	Components of the unitary directional vector of the "pair" track.
TKR_Pair_x0 TKR_Pair_y0 TKR_Pair_z0	Coordinate of the RC initial vertex of the "pair" track. currently in centimeters
TKR_XKalEne TKR_YKalEne	Kalman fit guess at track energy for "pair" track, for X and Y tracks
TKR_Fit_Gaps	Number of "gaps" in best track summed over X and Y projections
TKR_No_Noise	Number of noise hits - not filled now
TKR_No_Noise_1st	Not filled now
TKR_Fit_XNHits TKR_Fit_YNHits	Number of hits on best track, for X and Y tracks
TKR_Pair_XNHits TKR_Pair_YNHits	Number of hits on pair track, for X and Y tracks
TKR_Fit_XChisq TKR_Fit_YChisq	Xi^2 of best track in X and Y projections
TKR_Fit_XChisq_1st TKR_Fit_YChisq_1st	Xi^2 of initial segment of best track, in X and Y projections
TKR_Fit_XKalThetaMS TKR_Fit_YKalThetaMS	Kalman Filter derived estimate of the multiple scattering angles for the best track in X and Y projections
TKR_Fit_XKalEne TKR_Fit_YKalEne	Kalman fit guess at track energy for "best" track, for X and Y tracks
TKR_qual_X TKR_qual_Y TKR_qual	Best track quality factors, X and Y projections and sum of two
TKR_Hits_in_Lyr_0... TKR_Hits_In_Lyr_n	Sum of number of X and Y clusters in each layer

General

Trig_Bits	Definition of trigger bits: 1, set if cover or side veto, low threshold 2, cover or side veto, high threshold 4, 3 consecutive x-y layers hit 8, single log above low threshold 16, 3 cal layers in a row above high threshold
REC_Conv_Twr_Dist
REC_Fit_xV
REC_Fit_yV
REC_Active_Dist	Distance to the nearest edge of the converter dice of the estimated conversion point. Negative distance indicate conversions outside the converter. AO: computed in ActiveDistance.cxx NOTE: Not calculated for PDR
REC_fst_Hit_Count
REC_Surplus_Hit_Ratio	Average number of hits within 5 sigma of the best primary track fit. AO: computed in ExtraHits
REC_Outside_Hit_Ratio	Average number of hits outside 5 sigma of the best primary track fi
REC_ShowerHits1
REC_Tkr_SkirtX	x coordinate of the projection of the best gamma track to the plane containing the face of the calorimeter
REC_Tkr_SkirtY	y coordinate of the projection of the best gamma track to the plane containing the face of the calorimeter
REC_ShowerHits2
REC_Sum_Hits
REC_CsI_Corr_energy