Additional protection when the energy loss cannot be treated using Bethe-Bloch formula

diff --git a/STEER/AliExternalTrackParam.cxx b/STEER/AliExternalTrackParam.cxx
index 2f4eeda5cc61390424b90b689f5fb946d686ff7e..c64e0d6d74ec73b300e5d8d91bd22b94af781110 100644 (file)
--- a/STEER/AliExternalTrackParam.cxx
+++ b/STEER/AliExternalTrackParam.cxx
@@ -215,6 +215,7 @@ Bool_t AliExternalTrackParam::CorrectForMaterial
      d*=x0;
      Double_t dE=Bethe(beta2)*d;
      Double_t e=TMath::Sqrt(p2 + mass*mass);
+     if ( TMath::Abs(dE) > 0.3*e ) return kFALSE; //30% energy loss is too much!
      fP4*=(1.- e/p2*dE);
 
      // Approximate energy loss fluctuation (M.Ivanov)