Monte Carlo distributions.

These are distributions of quantities stored in the full MC tree.

General Quantities:

Histogram

Description

PARTCOUNTMC

number of McParticles

INTCOUNTMC

Number of integrating hits

POSCOUNTMC

Number of Position hits

MC Particle quantities:

Histogram

Description

ENERGYMC

Inital energy of each MC particle (recently changed to just
be for the primary particle)

MCTERMZ

Final z position of each MC particle.

MCX

Initial x position of each MC particle.

MCY

Initial y position of each MC particle.

MCPARTBITS

MC particle status bits (do we really need this?)

MC position hits:

Histogram

Description

POSENERGYDEP

Deposited energy of each position hit.

POSMCTYPE

Particle id for each position hit (is this the particle id
that generated the position hit?)

POSMCZ

z of position hit.

POSMCTKRTRAY

The tracker tray number that contains each position hit.

MC Integrating hits:

At the moment INTCOUNTMC is all integrating hits, all the
other integrating hit distributions only consider hits in the Cal.
At the moment all integrating hits are hits in the Cal.

Histogram

Description

INTENERGYDEPCAL

energy of each single integrating hit in the Cal

INTSEGMENT

Segment number of Cal integrating hit (each xtal
is divided into 12 segments)

INTMOMPOS

Position calculated from segment and moment. I am
not sure what this is. It is calculated as
float momPos = 326.*(segn+0.5)/12 + moment - 163.;

INTENERGYTOT

Total energy deposited in active volumes in the Cal.

Trigger related distributions:

These are obtained from evt->getL1T();

Histogram

Description

TRGBITS

Trigger bit that were set.

TRGWORD

Trigger word

Digitization Quantities

Cal Digi Distributions:

These are obtained from the digi root tree.

Histogram

Description

CALDIGICOUNT

The number of CAL digis in each event.

CALADC

The ADC value from both faces of each xtal.

CALADCN

The ADC value from negetive face of each xtal.

CALADCP

The ADC value from positive face of each xtal.

CALRANGE

The range for each xtal end. There are 4, high and
low gain for the small and large diodes.

CALEAVE

Sum of the ADC on each face/2. We are not accounting for the different ranges here, so this does not quite
correspond to an energy.

CALEAVETOTAL

This is the sum of all the CALEAVE for each event. We should make this be the actual digi energy. This will not be the same as theMC integrating hit total energy because we should see the effect of noise and direct hits to diodes.

CALLAYER

The layer (in the Cal) of this digi.

CALTOWER

The tower of this digi.

CALCOLUMN

The column of this digi.

CALNLAYERx

The number of cal digi hits in layer x

CALELAYERx

The sum of CALEAVE in layer x

ACD Digi Distributions:

These are obtained from the digi root tree.

Histogram

Description

ACDDIGICOUNT

The number of ACD digis.

ACDADC

The ADC value of each hit pmt in the ACD.

ACDADCTOT

The sum of ADC values over all pmts.

Reconstruction quantities

Tracker Recon distributions:

The prefix TKR means that the distribution come from TkrRecon in the
recon root tree. If the prefix is TKRTRK then the distribution is for
all tracks. If the prefix is TKRHIT then the distribution is filled in
a loop over all recon hits (this is a loop over all tracks and all hits
with each track – so hits can be counted more than once). If the prefix
is TKRVTX then the distribution is for all vertices in each event.

Histogram

Description

TKRNUMTRACKS

The number of fit tracks per event.

TKRNUMVERTICES

The number of vertices per event.

TKRTRKNHITS

The number of hits per track.

TKRTRKQUALITY

The track quality.

TKRTRKSTARTZ

The z position of the first hit of each track.

TKRTRKSTARTX

The x position of the first hit of each track.

TKRTRKSTARTY

The y position of the first hit of each track.

TKRTRKSLOPEX

The x slope of each track.

TKRTRKSLOPEY

The y slope of each track.

TKRTRKENERGY

The track energy (track->getKalEnergy)

Cal Recon distributions:

Histogram

Description

CALCLUSCOUNT

The number of reconstructed clusters

CALRMSTRANS

The spread of each cluster in the transverse direction.

CALRMSLONG

The spread of each cluster in the longitudinal direction.

CALTRANSVOFFSET

The ransverse offset of average position in the calorimeter with respect to the position predicted from tracker information

CALXPOS

Cal Cluster x position

CALYPOS

Cal Cluster y position

CALZPOS

Cal Cluster z position

CALDRC

Cal Cluster direction cosine

CALRECESUM

Raw energy sum. This should be renamed CalEnergySum

CALRECELEAK

This should be renamed CALENERGYLLCORR

CALRECECORR

Energy from CalValsTool. This should be renames CALENERGYCORR

CALRECEFIT

Profile fit corrected energy

ACD Recon Distributions:

Histogram

Description

ACDTILECOUNT

Number of hit tiles.

ACDENERGY

Total Energy deposited in the ACD (not including ribbons?)

ACDDOCA

Minimum distance between a track and the center of all ACD tiles.

ACDACTDIST

Minimum distance between a track and the edges of ACD tiles.

ACDGAMMADOCA

Distance of vertex extrapolation to the center of the closest tile

Ntuple-derived histograms

Variables which have a name that is a mixture of upper and lower case
letters are drawn from the merit tuple, which is documented
elsewhere. Some cuts have been applied to clean the
distributions. "GltWord > 3 && TkrNumTracks>0" for all
distributions. There is an additional cut of "CalEnergySum>0.5" for
CalEnergyCorr, CalEnergyLLCorr, EvtMcEnergySigma, EvtEnergySumOpt,
Tkr1PhiErr and Tkr1ThetaErr. These cuts, and the choice of distributions
is still under review.

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