TrkCuts/TrkNucleiZCut/TrkNucleiZCut.h

/*
 * TrkNucleiZCut.h
 *
 *  Created on: 10-mag-2009
 *      Author: Nicola Mori
 */

/*! @file TrkNucleiZCut.h The TofNucleiZCut class definition file */

#ifndef NO_TRKNUCLEI

#ifndef TRKNUCLEIZCUT_H_
#define TRKNUCLEIZCUT_H_

#include "../../PamCutBase/PamCutBase.h"
#include <TrkNuclei.h>

#include <TH2F.h>

/*! @enum TrkNucleiZ_Return Return values for rejected events */
enum TrkNucleiZ_Return {
  TRKNUCLEIZ_OUTOFBOUNDS, ///< Discarded because charge is out of bounds
  TRKNUCLEIZ_TOOFEWLAYERS, ///< Discarded because charge can be measured in too few layers.
  TRKNUCLEIZ_ILLEGALZ
///< Discarded because charge is not between 1 and 8
};

/*! @enum TrkNucleiZ_method Method to use to measure Z. */
enum TrkNucleiZ_method {
  TRKNUCLEIZ_BETA, ///< Tracker dE/dx Vs. ToF beta
  TRKNUCLEIZ_RIG,
///< Tracker standalon e: dE/dx Vs. rigidity
};

/*! @enum TrkNucleiZ_Check Handy aliases to set check mean */
enum TrkNucleiZ_Check {
  TRKNUCLEIZ_CHECKMEAN, ///< Check the mean value.
  TRKNUCLEIZ_CHECKSINGLEVALUES
///< Check each single charge from each layer.
};

/*! @brief The TrkNuclei charge cut.
 *
 * This cut uses the TrkNuclei library to cut events depending on particle's charge value.
 *
 */

class TrkNucleiZCut: public PamCut {

public:
  /*! @brief Constructor.
   *
   * The charge to look for is passed to the TrkNucleiZCut 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.
   *
   * @param cutName The cut's name.
   * @param Z The charge value.
   * @param lowerLimit The lower bound (in units of sigma_Z) of the desired charge range, defined as Zmean - lowerBound*sigmaZ.
   * @param upperLimit The upper bound (in units of sigma_Z) of the desired charge range, defined as Zmean + upperBound*sigmaZ.
   * @param minLayers The minimum required number of layers which give a valid charge information.
   * @param howToCheck Flag to set the check by mean release or by release in single planes (see #TrkNucleiZ_Check).
   * @param method The method to use to measure the particle's charge (see #TrkNucleiZ_method).
   * @return
   */
  TrkNucleiZCut(const char *cutName, unsigned int Z, float lowerLimit, float upperLimit, unsigned int minLayers = 1,
      unsigned int howToCheck = TRKNUCLEIZ_CHECKMEAN, unsigned int method = TRKNUCLEIZ_RIG) :
    PamCut(cutName), _Z(Z), _lowerLimit(lowerLimit), _upperLimit(upperLimit), _trkNuclei(NULL), _minLayers(minLayers),
        _howToCheck(howToCheck), _method(method) {

  }
  /*! @brief Destructor. */
  ~TrkNucleiZCut() {
    delete _trkNuclei;
  }

  /*! @brief The TrkNucleiZ check.
   *
   * The routine selects events whose value of Zmean obtained from the TrkNuclei Class 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 TrkNuclei.
   * In current implementation, calibrations for Z=1 and Z=2 for mean dE/dx Vs. rigidity are:
   *
   *  Z=1 |   mean     sigma
   *  ------------------------
   *      |  0.992      0.06
   *
   *
   *  Z=2 |   mean     sigma
   *  ------------------------
   *      |  1.99       0.1
   *
   * For all other cases (Z>2 or single plane releases or dE/dx Vs. beta), means are taken to be equal to the charge value (Zmean = Z) and sigmas are:
   *
   *   Z |  sigma
   *   -----------
   *   1 |  0.09
   *   2 |  0.10
   *   3 |  0.17
   *   4 |  0.34
   *   5 |  0.44
   *   6 |  0.59
   *
   * The TofNuclei calibrations used are the standard ones (from Wolfgang, see TrkNuclei.cpp).
   * First of all, the number of layers giving a valid charge information is checked to be greater than minLayers; if it's not so,
   * the routine will return #TRKNUCLEIZ_TOOFEWLAYERS. Next, it will check if the charge obtained considering the mean dE/dx in the tracker's
   * layers is in the validity range if the constructor's flag howToCheckMean was set to TRKNUCLEIZ_CHECKMEAN; otherwise, it will check each
   * single valid charge value (mean for X and Y views) obtained from each layer. In the latter case, it will return #CUTOK only if all
   * valid layers (ie., those tagged as good for both X and Y in traccker level 2 routines) give a charge inside the bounds, regardless of
   * the value of minLayers.
   *
   * @param event The event to analyze.
   * @return #CUTOK if the charge from mean dE/dx(if howToCheck == #TRKNUCLEIZ_CHECKMEAN) or all the single layer charges
   *         (if howToCheck == #TRKNUCLEIZ_CHECKSINGLEVALUES) obtained from TrkNuclei are in the range [Z - sigma*lowerBound, Z + sigma*upperBound].
   * @return #TRKNUCLEIZ_OUTOFBOUNDS if the charge from mean dE/dx(if howToCheck == #TRKNUCLEIZ_CHECKMEAN) or at least one valid single layer
   *         charge (if howToCheck == #TRKNUCLEIZ_CHECKSINGLEVALUES) is out of bounds.
   * @return #TRKNUCLEIZ_TOOFEWLAYERS if charge information is available for a number of layers lesser than minLayers.
   * @return #TRKNUCLEIZ_OUTOFBOUNDS if Z < 1 or Z > 6.
   *
   */
  int Check(PamLevel2 *event);

private:

  unsigned int _Z;

  static const float _meanRigMean[]; //Means for mean dE/dx Vs. rigidity
  static const float _sigmaRigMean[];//Sigmas for mean dE/dx Vs. rigidity
  static const float _meanBetaMean[]; //Means for mean dE/dx Vs. beta
  static const float _sigmaBetaMean[];//Sigmas for mean dE/dx Vs. beta

  float _lowerLimit;
  float _upperLimit;
  TrkNuclei *_trkNuclei;
  unsigned int _minLayers;
  unsigned int _howToCheck;
  unsigned int _method;
};
#endif /* TRKNUCLEIZCUT_H_ */

#endif /* NO_TRKNUCLEI */
1	/*
2	* TrkNucleiZCut.h
3	*
4	* Created on: 10-mag-2009
5	* Author: Nicola Mori
6	*/
7
8	/! @file TrkNucleiZCut.h The TofNucleiZCut class definition file /
9
10	#ifndef NO_TRKNUCLEI
11
12	#ifndef TRKNUCLEIZCUT_H_
13	#define TRKNUCLEIZCUT_H_
14
15	#include "../../PamCutBase/PamCutBase.h"
16	#include <TrkNuclei.h>
17
18	#include <TH2F.h>
19
20	/! @enum TrkNucleiZ_Return Return values for rejected events /
21	enum TrkNucleiZ_Return {
22	TRKNUCLEIZ_OUTOFBOUNDS, ///< Discarded because charge is out of bounds
23	TRKNUCLEIZ_TOOFEWLAYERS, ///< Discarded because charge can be measured in too few layers.
24	TRKNUCLEIZ_ILLEGALZ
25	///< Discarded because charge is not between 1 and 8
26	};
27
28	/! @enum TrkNucleiZ_method Method to use to measure Z. /
29	enum TrkNucleiZ_method {
30	TRKNUCLEIZ_BETA, ///< Tracker dE/dx Vs. ToF beta
31	TRKNUCLEIZ_RIG,
32	///< Tracker standalon e: dE/dx Vs. rigidity
33	};
34
35	/! @enum TrkNucleiZ_Check Handy aliases to set check mean /
36	enum TrkNucleiZ_Check {
37	TRKNUCLEIZ_CHECKMEAN, ///< Check the mean value.
38	TRKNUCLEIZ_CHECKSINGLEVALUES
39	///< Check each single charge from each layer.
40	};
41
42	/*! @brief The TrkNuclei charge cut.
43	*
44	* This cut uses the TrkNuclei library to cut events depending on particle's charge value.
45	*
46	*/
47
48	class TrkNucleiZCut: public PamCut {
49
50	public:
51	/*! @brief Constructor.
52	*
53	* The charge to look for is passed to the TrkNucleiZCut object as Z. For each charge, there is an associated distribution of
54	* events, with mean Zmean and standard deviation sigmaZ. These values will be used to check the events.
55	*
56	* @param cutName The cut's name.
57	* @param Z The charge value.
58	* @param lowerLimit The lower bound (in units of sigma_Z) of the desired charge range, defined as Zmean - lowerBound*sigmaZ.
59	* @param upperLimit The upper bound (in units of sigma_Z) of the desired charge range, defined as Zmean + upperBound*sigmaZ.
60	* @param minLayers The minimum required number of layers which give a valid charge information.
61	* @param howToCheck Flag to set the check by mean release or by release in single planes (see #TrkNucleiZ_Check).
62	* @param method The method to use to measure the particle's charge (see #TrkNucleiZ_method).
63	* @return
64	*/
65	TrkNucleiZCut(const char *cutName, unsigned int Z, float lowerLimit, float upperLimit, unsigned int minLayers = 1,
66	unsigned int howToCheck = TRKNUCLEIZ_CHECKMEAN, unsigned int method = TRKNUCLEIZ_RIG) :
67	PamCut(cutName), _Z(Z), _lowerLimit(lowerLimit), _upperLimit(upperLimit), _trkNuclei(NULL), _minLayers(minLayers),
68	_howToCheck(howToCheck), _method(method) {
69
70	}
71	/! @brief Destructor. /
72	~TrkNucleiZCut() {
73	delete _trkNuclei;
74	}
75
76	/*! @brief The TrkNucleiZ check.
77	*
78	* The routine selects events whose value of Zmean obtained from the TrkNuclei Class is in the range [Zmean - sigmalowerBound, Zmean + sigmaupperBound].
79	* Zmean and sigma are defined respectively as the mean and the standard deviation of the charge distributions obtained using TrkNuclei.
80	* In current implementation, calibrations for Z=1 and Z=2 for mean dE/dx Vs. rigidity are:
81	*
82	* Z=1 \| mean sigma
83	* ------------------------
84	* \| 0.992 0.06
85	*
86	*
87	* Z=2 \| mean sigma
88	* ------------------------
89	* \| 1.99 0.1
90	*
91	* For all other cases (Z>2 or single plane releases or dE/dx Vs. beta), means are taken to be equal to the charge value (Zmean = Z) and sigmas are:
92	*
93	* Z \| sigma
94	* -----------
95	* 1 \| 0.09
96	* 2 \| 0.10
97	* 3 \| 0.17
98	* 4 \| 0.34
99	* 5 \| 0.44
100	* 6 \| 0.59
101	*
102	* The TofNuclei calibrations used are the standard ones (from Wolfgang, see TrkNuclei.cpp).
103	* First of all, the number of layers giving a valid charge information is checked to be greater than minLayers; if it's not so,
104	* the routine will return #TRKNUCLEIZ_TOOFEWLAYERS. Next, it will check if the charge obtained considering the mean dE/dx in the tracker's
105	* layers is in the validity range if the constructor's flag howToCheckMean was set to TRKNUCLEIZ_CHECKMEAN; otherwise, it will check each
106	* single valid charge value (mean for X and Y views) obtained from each layer. In the latter case, it will return #CUTOK only if all
107	* valid layers (ie., those tagged as good for both X and Y in traccker level 2 routines) give a charge inside the bounds, regardless of
108	* the value of minLayers.
109	*
110	* @param event The event to analyze.
111	* @return #CUTOK if the charge from mean dE/dx(if howToCheck == #TRKNUCLEIZ_CHECKMEAN) or all the single layer charges
112	* (if howToCheck == #TRKNUCLEIZ_CHECKSINGLEVALUES) obtained from TrkNuclei are in the range [Z - sigmalowerBound, Z + sigmaupperBound].
113	* @return #TRKNUCLEIZ_OUTOFBOUNDS if the charge from mean dE/dx(if howToCheck == #TRKNUCLEIZ_CHECKMEAN) or at least one valid single layer
114	* charge (if howToCheck == #TRKNUCLEIZ_CHECKSINGLEVALUES) is out of bounds.
115	* @return #TRKNUCLEIZ_TOOFEWLAYERS if charge information is available for a number of layers lesser than minLayers.
116	* @return #TRKNUCLEIZ_OUTOFBOUNDS if Z < 1 or Z > 6.
117	*
118	*/
119	int Check(PamLevel2 *event);
120
121	private:
122
123	unsigned int _Z;
124
125	static const float _meanRigMean[]; //Means for mean dE/dx Vs. rigidity
126	static const float _sigmaRigMean[];//Sigmas for mean dE/dx Vs. rigidity
127	static const float _meanBetaMean[]; //Means for mean dE/dx Vs. beta
128	static const float _sigmaBetaMean[];//Sigmas for mean dE/dx Vs. beta
129
130	float _lowerLimit;
131	float _upperLimit;
132	TrkNuclei *_trkNuclei;
133	unsigned int _minLayers;
134	unsigned int _howToCheck;
135	unsigned int _method;
136	};
137	#endif /* TRKNUCLEIZCUT_H_ */
138
139	#endif /* NO_TRKNUCLEI */