diff --git a/Generators/share/egconfig/pythia8_HeO.cfg b/Generators/share/egconfig/pythia8_HeO.cfg
new file mode 100644
index 0000000000000..6b5b01269fd5d
--- /dev/null
+++ b/Generators/share/egconfig/pythia8_HeO.cfg
@@ -0,0 +1,10 @@
+### beams
+Beams:frameType 2       # back-to-back beams of different energies and particles
+Beams:idA 1000020040    # Helium
+Beams:idB 1000080160    # Oxygen
+Beams:eA 3400.          # Energy in GeV per Helium nucleon (6.8 Z TeV) moving in the +z direction
+Beams:eB 3400.          # Energy in GeV per Oxygen nucleon (6.8 Z TeV) moving in the -z direction
+
+### decays
+ParticleDecays:limitTau0 on
+ParticleDecays:tau0Max 10.
\ No newline at end of file
diff --git a/Generators/share/egconfig/pythia8_OHe.cfg b/Generators/share/egconfig/pythia8_OHe.cfg
new file mode 100644
index 0000000000000..90f3c06a74d8c
--- /dev/null
+++ b/Generators/share/egconfig/pythia8_OHe.cfg
@@ -0,0 +1,10 @@
+### beams
+Beams:frameType 2       # back-to-back beams of different energies and particles
+Beams:idA 1000080160    # Oxygen
+Beams:idB 1000020040    # Helium
+Beams:eA 3400.          # Energy in GeV per Oxygen nucleon (6.8 Z TeV) moving in the +z direction
+Beams:eB 3400.          # Energy in GeV per Helium nucleon (6.8 Z TeV) moving in the -z direction
+
+### decays
+ParticleDecays:limitTau0 on
+ParticleDecays:tau0Max 10.
\ No newline at end of file