--- PamCut/CommonDefs.h	2010/03/10 08:54:44	1.7
+++ PamCut/CommonDefs.h	2010/05/28 14:41:16	1.9.2.1
@@ -14,6 +14,9 @@
 /*! @brief The implementations of PamCut::Check() must return this value if the event satisfy the cut*/
 const int CUTOK = -1;
 
+const float POSITIVE = 1.0; ///< Positive sign alias
+const float NEGATIVE = -1.0; ///< Negative sign alias
+
 /*! @enum DETECTORCODE
  * The values for each detector correspond to a binary code associated to that detector.
  * These can be arithmetically added to create a binary code for a set of detectors.
@@ -31,7 +34,7 @@
 ///< Code for Calorimeter level1
 };
 
-/*! @enum TOFLAYERS Flags to identify layers. */
+/*! @enum TOFLAYERS Flags to identify TOF layers. */
 enum TOFLAYERS {
   S11 = 1, ///< S11.
   S12 = 2, ///< S12.
@@ -42,6 +45,24 @@
 ///< S32.
 };
 
+/*! @enum TRKLAYERS Flags to identify Tracker layers. */
+enum TRKLAYERS {
+  T1X = 1, ///< T1X.
+  T2X = 2, ///< T2X.
+  T3X = 4, ///< T3X.
+  T4X = 8, ///< T4X.
+  T5X = 16, ///< T5X.
+  T6X = 32, ///< T6X.
+  TX = 63, ///< All the X layers
+  T1Y = 64, ///< T1Y.
+  T2Y = 128, ///< T2Y.
+  T3Y = 256, ///< T3Y.
+  T4Y = 512, ///< T4Y.
+  T5Y = 1024, ///< T5Y.
+  T6Y = 2048, ///< T6Y.
+  TY = 4032
+///< All the Y layers
+};
 /*! @var TOFNPADLAYER
  * The number of pads in each ToF layer. S11 corresponds to element 0, S12 to element 1 and so on.
  */
@@ -50,22 +71,22 @@
 /*! @var H_MASS
  * Proton mass
  */
-const Float_t H_MASS = 0.93827203; // GeV (pdg.web.cern.ch)
+const float H_MASS = 0.93827203; // GeV (pdg.web.cern.ch)
 
 /*! @var HE4_MASS
  * Helium 4 mass
  */
-const Float_t HE4_MASS = 3.7274; // GeV (http://hyperphysics.phy-astr.gsu.edu/Hbase/pertab/He.html)
+const float HE4_MASS = 3.7274; // GeV (http://hyperphysics.phy-astr.gsu.edu/Hbase/pertab/He.html)
 
 /*! @var HE3_MASS
  * Helium 3 mass
  */
-const Float_t HE3_MASS = 2.8084; // GeV (http://hyperphysics.phy-astr.gsu.edu/Hbase/pertab/He.html)
+const float HE3_MASS = 2.8084; // GeV (http://hyperphysics.phy-astr.gsu.edu/Hbase/pertab/He.html)
 
 /*! @var E_MASS
  * Electron mass
  */
-const Float_t E_MASS = 0.000510998; // GeV (from PDG)
+const float E_MASS = 0.000510998; // GeV (from PDG)
 
 /*! @brief A simple matrix class.
  *