+//////////////////////////////////////////////////
+// Base response class for ITS //
+// It is used to set static data members //
+// connected to parameters equal for all //
+// the SSD modules //
+//////////////////////////////////////////////////
+
+
+const Float_t AliITSresponseSSD::fgkDiffCoeffDefault = 0.;
+const Double_t AliITSresponseSSD::fgkfCouplingPR = 0.01;
+const Double_t AliITSresponseSSD::fgkfCouplingPL = 0.01;
+const Double_t AliITSresponseSSD::fgkfCouplingNR = 0.01;
+const Double_t AliITSresponseSSD::fgkfCouplingNL = 0.01;
+const Int_t AliITSresponseSSD::fgkZSThreshold = 3;
+