diff --git a/MC/GeneratorConfig.C b/MC/GeneratorConfig.C
index 48d1f88c..de399b68 100644
--- a/MC/GeneratorConfig.C
+++ b/MC/GeneratorConfig.C
@@ -126,14 +126,14 @@ GeneratorConfig(Int_t tag, Int_t run)
   Float_t sigmaxy = TMath::Sqrt(eps * betast / gamma) / TMath::Sqrt(2.) * 100.;  // LHC period specific
   if (gSystem->Getenv("CONFIG_PERIOD")) {
     TString periodName = gSystem->Getenv("CONFIG_PERIOD");
-    if (periodName.EqualTo("LHC10h")) sigmaxy =  90.e-4;
-    if (periodName.EqualTo("LHC11a")) sigmaxy = 130.e-4;
-    if (periodName.EqualTo("LHC11h")) sigmaxy = 120.e-4;
-    if (periodName.EqualTo("LHC13b")) sigmaxy =  40.e-4;
-    if (periodName.EqualTo("LHC13c")) sigmaxy =  40.e-4;
-    if (periodName.EqualTo("LHC13d")) sigmaxy =  40.e-4;
-    if (periodName.EqualTo("LHC13e")) sigmaxy =  40.e-4;
-    if (periodName.EqualTo("LHC15n")) sigmaxy = 100.e-4;
+    if (periodName.EqualTo("LHC10h")) sigmaxy =  80.e-4;
+    if (periodName.EqualTo("LHC11a")) sigmaxy = 120.e-4;
+    if (periodName.EqualTo("LHC11h")) sigmaxy = 110.e-4;
+    if (periodName.EqualTo("LHC13b")) sigmaxy =  35.e-4;
+    if (periodName.EqualTo("LHC13c")) sigmaxy =  35.e-4;
+    if (periodName.EqualTo("LHC13d")) sigmaxy =  35.e-4;
+    if (periodName.EqualTo("LHC13e")) sigmaxy =  35.e-4;
+    if (periodName.EqualTo("LHC15n")) sigmaxy =  90.e-4;
     if (periodName.EqualTo("LHC15o")) sigmaxy =  30.e-4;
   }