/[PAMELA software]/PamCut/TofCuts/TofDedxHeCut/TofDedxHeCut.h
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revision 1.1 by pam-fi, Wed Aug 5 14:03:21 2009 UTC revision 1.3 by pam-fi, Tue Sep 22 10:24:25 2009 UTC
# Line 16  Line 16 
16   * This cut discards events where TOF dE/dx vs. Beta are outside the helium "corridor". This corridor is currently   * This cut discards events where TOF dE/dx vs. Beta are outside the helium "corridor". This corridor is currently
17   * defined by:   * defined by:
18   *   *
19   * dE/dx > 1 / (0.2 * (beta - 0.05)) - 2.   * dE/dx > 1 / (p[0] * pow(beta, p[4]) + p[1]) + p[2] + p[3]*beta
20   * dE/dx < 1 / (0.25 * (beta - 0.1))   * dE/dx < 1 / (p[5] * pow((*beta), p[9]) + p[6]) + p[7] + p[8]*(*beta);
  * dE/dx > 11. * beta - 7.7  
21   *   *
22   * dE/dx is the mean of the energy releases on S11, S12, S21, S22.   * where p[i] are calibration parameters. Currently, they are available for each single layer; the beta used is the beta[12] corresponding
23     * to the TOF standalone track or to the TRK physical track, depending on the value of the standAlone parameter of the constructor. The
24     * cut parameters have been obtained using the standalone beta, but they have proven to be good also for beta from tracker, so a single
25     * set of parameter will be used for both cases.
26     * If the required combination of planes has no available calibration, the one for S21 will be used (but it probably won't work well...).
27     * In particular, there's no currently available calibration for combinations of layers.
28   */   */
29  class TofDedxHeCut: public PamCut {  class TofDedxHeCut: public PamCut {
30    
# Line 28  public: Line 32  public:
32    /*! @brief Constructor.    /*! @brief Constructor.
33     *     *
34     * @param cutName The cut's name.     * @param cutName The cut's name.
35       * @param layer The layer to use. Select it using values like #S11 (for single layers) or S11+S12 (for the mean of many layers).
36       * @param standAlone If true, the cut will use the standalone measure of beta; otherwise it will use the
37       *                   physical track.
38     */     */
39    TofDedxHeCut(const char *cutName) :    TofDedxHeCut(const char *cutName, unsigned int layer, bool standAlone = true);
     PamCut(cutName) {  
   }  
40    /*! @brief Destructor. */    /*! @brief Destructor. */
41    ~TofDedxHeCut() {    ~TofDedxHeCut() {
42    
43    }    }
44    
45    /*! @brief The dE/dx vs. beta Helium check.    /*! @brief The dE/dx vs. beta helium check.
46     *     *
47     * @param event The event to analyze.     * @param event The event to analyze.
48     * @return #CUTOK if event is inside helium "corridor".     * @return #CUTOK if event is inside helium "corridor".
# Line 47  public: Line 52  public:
52    
53  private:  private:
54    
55      unsigned int _layer;
56      bool _standAlone;
57      const float *_p;
58      // Single layers standalone
59      static const float _S11_SA_params[10], _S12_SA_params[10], _S21_SA_params[10], _S22_SA_params[10], _S31_SA_params[10],
60          _S32_SA_params[10];
61  };  };
62    
63  #endif /* TOFDEDXHECUT_H_ */  #endif /* TOFDEDXHECUT_H_ */
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