TofNucleiZCut Class Reference
The TofNuclei charge cut. More...
#include <TofNucleiZCut.h>
Public Member Functions | |
| TofNucleiZCut (const char *cutName, unsigned int Z, float lowerLimit, float upperLimit, unsigned int minLayers=6, unsigned int layersMask=0) | |
| Constructor. | |
| ~TofNucleiZCut () | |
| Destructor. | |
| int | Check (PamLevel2 *event) |
| The TofNucleiZ check. | |
Private Attributes | |
| unsigned int | _Z |
| SimpleMatrix< float > | _mean |
| SimpleMatrix< float > | _sigma |
| float | _lowerLimit |
| float | _upperLimit |
| unsigned int | _minLayers |
| unsigned int | _layersMask |
| ToFNuclei * | _tofNuclei |
Static Private Attributes | |
| static const float | _sigmaZdefault [8] = { 0.12, 0.15, 0.20, 0.25, 0.32, 0.40, 0.45, 0.50 } |
| static const unsigned int | _maskArray [6] |
Detailed Description
The TofNuclei charge cut.This cut uses the TofNuclei library (with only TOF standalone track information) to cut events depending on particle's charge value.
Definition at line 47 of file TofNucleiZCut.h.
Constructor & Destructor Documentation
| TofNucleiZCut::TofNucleiZCut | ( | const char * | cutName, | |
| unsigned int | Z, | |||
| float | lowerLimit, | |||
| float | upperLimit, | |||
| unsigned int | minLayers = 6, |
|||
| unsigned int | layersMask = 0 | |||
| ) |
Constructor.
The charge to look for is passed to the TofNucleiZCut object as Z. For each charge, there is an associated distribution of events, with mean Zmean and standard deviation sigmaZ. These values will be used to check the events.
- Parameters:
-
cutName The cut's name. Z The charge value. lowerLimit The lower bound (in units of sigmaZ) of the desired charge range, defined as Zmean - lowerBound*sigmaZ. upperLimit The upper bound (in units of sigmaZ) of the desired charge range, defined as Zmean + upperBound*sigmaZ. minLayers The minimum number of layers for which Z must have been measured. layersMask The masked layers (see TofNucleiZ_Layers). These will be ignored throughout all the TofNucleiZCut analysis.
- See also:
- Check
Definition at line 19 of file TofNucleiZCut.cpp.
References _mean, _sigma, and _sigmaZdefault.
| TofNucleiZCut::~TofNucleiZCut | ( | ) | [inline] |
Member Function Documentation
| int TofNucleiZCut::Check | ( | PamLevel2 * | event | ) | [virtual] |
The TofNucleiZ check.
The routine selects events whose value of Zmean obtained from the ToF is in the range [Zmean - sigma*lowerBound, Zmean + sigma*upperBound]. Zmean and sigma are defined respectively as the mean and the standard deviation of the charge distributions obtained using ToFNuclei. The calibration values used in this routine (for all energies) are:
Z=1 | Zmean sigma ------------------------ S11 | 0.987 0.11 S12 | 0.988 0.12 S21 | 0.961 0.083 S22 | 0.966 0.10 S31 | 0.981 0.092 S32 | 0.979 0.095
Z=2 | Zmean sigma ------------------------ S11 | 1.96 0.12 S12 | 1.95 0.14 S21 | 1.95 0.13 S22 | 1.96 0.14 S31 | 1.99 0.14 S32 | 2.00 0.15
In current implementation, heavier nuclei up to oxygen are partially calibrated; means are taken equal to the particle's charge (Zmean = Z) and a single sigma is used for all ToF layers:
Z | sigma ----------- 3 | 0.20 4 | 0.25 5 | 0.32 6 | 0.40 7 | 0.45 8 | 0.50
The charge of the particle is detrmined by calling ToFNuclei::Get_Charge_ToF_std_layer(). First of all, the number of non-masked layers giving a valid charge information is checked to be greater than minLayers; then the bound on the charge value is checked for all valid planes. If at least one of the valid, non-masked planes gives a charge outside the bounds the routine will return TOFNUCLEIZ_OUTOFBOUNDS. Note that this happens even if more than minLayers give a charge inside boundaries; for example, if minLayers = 5 and we have 6 good charge measurement of which only 5 are inside the boundaries, the check will fail. Notice that masking a layer has the net effect of reducing the number of layers: asking minLayers = 5 and masking two planes will result in return value of TOFNUCLEIZ_TOOFEWLAYERS for all events, since the "effective ToF" has only 4 layers.
- Parameters:
-
event The event to analyze.
- Returns:
- CUTOK if the charge obtained from TofNuclei is in the range [Z - sigma*lowerBound, Z + sigma*upperBound] in at least minLayers (apart from eventual masked layers).
TOFNUCLEIZ_OUTOFBOUNDS if charge is out of bounds in at least one non-masked layer.
TOFNUCLEIZ_TOOFEWLAYERS if charge information is available for a number of layers lesser than minLayers.
TRKNUCLEIZ_OUTOFBOUNDS if Z < 1 or Z > 8.
Implements PamCut.
Definition at line 78 of file TofNucleiZCut.cpp.
References _layersMask, _lowerLimit, _maskArray, _mean, _minLayers, _sigma, _tofNuclei, _upperLimit, _Z, CUTOK, TOFNUCLEIZ_ILLEGALZ, TOFNUCLEIZ_OUTOFBOUNDS, and TOFNUCLEIZ_TOOFEWLAYERS.
Member Data Documentation
unsigned int TofNucleiZCut::_layersMask [private] |
float TofNucleiZCut::_lowerLimit [private] |
const unsigned int TofNucleiZCut::_maskArray [static, private] |
SimpleMatrix<float> TofNucleiZCut::_mean [private] |
unsigned int TofNucleiZCut::_minLayers [private] |
SimpleMatrix<float> TofNucleiZCut::_sigma [private] |
const float TofNucleiZCut::_sigmaZdefault = { 0.12, 0.15, 0.20, 0.25, 0.32, 0.40, 0.45, 0.50 } [static, private] |
ToFNuclei* TofNucleiZCut::_tofNuclei [private] |
float TofNucleiZCut::_upperLimit [private] |
unsigned int TofNucleiZCut::_Z [private] |
The documentation for this class was generated from the following files:
- TofCuts/TofNucleiZCut/TofNucleiZCut.h
- TofCuts/TofNucleiZCut/TofNucleiZCut.cpp
