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| ITS |[`PIDResponseITS.h`](https://github.com/AliceO2Group/O2Physics/blob/master/Common/DataModel/PIDResponseITS.h)|`#include "Common/DataModel/PIDResponseITS.h"`| ITS PID information |
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| TPC |[`PIDResponseTPC.h`](https://github.com/AliceO2Group/O2Physics/blob/master/Common/DataModel/PIDResponseTPC.h)|`#include "Common/DataModel/PIDResponseTPC.h"`| TPC PID information |
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| TOF |[`PIDResponseTOF.h`](https://github.com/AliceO2Group/O2Physics/blob/master/Common/DataModel/PIDResponseTOF.h)|`#include "Common/DataModel/PIDResponseTOF.h"`| TOF PID information |
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## Available PID Information
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The following table shows the available PID methods for each detector and particle species:
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| Information Type | Description | TOF Methods | TPC Methods | ITS Methods |
|**Beta**| Velocity as fraction of speed of light |`beta()`, `tofBeta()`| β = v/c, fundamental for mass calculation |
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|**Beta Error**| Uncertainty on beta measurement |`betaerror()`| Statistical uncertainty on β |
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|**TOF Mass**| Reconstructed particle mass |`mass()`, `tofMass()`| Calculated from momentum and β |
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```
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**Components:**
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-[`o2-analysis-pid-tof-merge`](https://github.com/AliceO2Group/O2Physics/tree/master/Common/TableProducer/PID/pidTOFMerge.cxx): Main TOF PID task
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-`o2-analysis-pid-tof-qa`: Optional QA histograms
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```
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**Components:**
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-[`o2-analysis-pid-tpc`](https://github.com/AliceO2Group/O2Physics/tree/master/Common/TableProducer/PID/pidTPC.cxx): Main TPC PID task
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-`o2-analysis-pid-tpc-base`: Base TPC PID processing
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-`o2-analysis-pid-tpc-qa`: Optional QA histograms
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### ITS PID Workflow
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Complete workflow including QA:
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```
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**Components:**
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-[`o2-analysis-pid-its`](https://github.com/AliceO2Group/O2Physics/tree/master/Common/TableProducer/PID/pidITS.cxx): Main ITS PID task (needed only to set the ITS PID Response parameters)
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-`o2-analysis-pid-its-qa`: Optional QA histograms
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**Note:** The `...` represents other tasks in your analysis workflow.
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## Enabling QA histograms
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### Enabling QA Tasks
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**TOF QA histograms:**
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```bash
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... | o2-analysis-pid-tof-qa | ...
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```
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**TPC QA histograms:**
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```bash
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... | o2-analysis-pid-tpc-qa | ...
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```
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### QA Output
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The QA tasks provide:
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- nSigma distributions for each particle species
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- Detector response monitoring
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- Calibration validation plots
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Beyond the basic PID functionality, the O2 Analysis Framework provides several advanced features for sophisticated particle identification workflows. These features are designed for users who need more control over PID calculations, better performance optimization, or specialized analysis requirements.
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### Key Advanced Features:
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### Key Advanced Features
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1.**Dynamic Columns**: Compute PID quantities on-the-fly without storing pre-calculated tables
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2.**Custom Parameterizations**: Use detector-specific response parameterizations from CCDB
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5.**Binned Storage**: Use compressed storage formats for large-scale analyses
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These advanced features are particularly useful for:
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