From ae66610050ac7aea096c78f12306ea5aa093afbc Mon Sep 17 00:00:00 2001
From: hristov <hristov@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Thu, 3 May 2007 17:15:21 +0000
Subject: [PATCH] Additional protection when the energy loss cannot be treated
 using Bethe-Bloch formula

---
 STEER/AliExternalTrackParam.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/STEER/AliExternalTrackParam.cxx b/STEER/AliExternalTrackParam.cxx
index 2f4eeda5cc6..c64e0d6d74e 100644
--- 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)
-- 
2.43.0