From 16c8bb0ea9152d941b30d748ec46d1e4f25f6b8b Mon Sep 17 00:00:00 2001
From: SCHOTTER Romain <47983209+romainschotter@users.noreply.github.com>
Date: Tue, 5 May 2026 15:00:41 +0200
Subject: [PATCH] Add new particles to O2DatabasePDG

---
 .../SimulationDataFormat/O2DatabasePDG.h      | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/DataFormats/simulation/include/SimulationDataFormat/O2DatabasePDG.h b/DataFormats/simulation/include/SimulationDataFormat/O2DatabasePDG.h
index 23dc30119aa7a..ef259e5322bb8 100644
--- a/DataFormats/simulation/include/SimulationDataFormat/O2DatabasePDG.h
+++ b/DataFormats/simulation/include/SimulationDataFormat/O2DatabasePDG.h
@@ -524,6 +524,48 @@ inline void O2DatabasePDG::addALICEParticles(TDatabasePDG* db)
     db->AddParticle("f2_1525", "f2_1525", 1.525, kFALSE, 0.073, 0, "Resonance", ionCode);
   }
 
+  // when using hadronic rescattering in Pythia8
+  ionCode = 9000221;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("f0_500", "f0_500", 0.500, kFALSE, 0.350, 0.0, "Resonance", ionCode);
+  }
+  ionCode = -100313;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("K*(1410)bar0", "K*(1410)bar0", 1.414, kFALSE, 0.232, 0, "Resonance", ionCode);
+  }
+  ionCode = 100313;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("K*(1410)0", "K*(1410)0", 1.414, kFALSE, 0.232, 0, "Resonance", ionCode);
+  }
+  ionCode = 100323;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("K*(1410)+", "K*(1410)+", 1.414, kFALSE, 0.232, +1, "Resonance", ionCode);
+  }
+  ionCode = -100323;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("K*(1410)-", "K*(1410)-", 1.414, kFALSE, 0.232, -1, "Resonance", ionCode);
+  }
+  ionCode = 100211;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("pi(1300)+", "pi(1300)+", 1.165, kFALSE, 0.400, +1, "Resonance", ionCode);
+  }
+  ionCode = -100211;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("pi(1300)-", "pi(1300)-", 1.165, kFALSE, 0.400, -1, "Resonance", ionCode);
+  }
+  ionCode = 202112;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("n(1440)0", "n(1440)0", 1.358, kFALSE, 0.350, 0, "Ion", ionCode);
+  }
+  ionCode = -202212;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("p(1440)bar-", "p(1440)bar-", 1.793, kFALSE, 0.350, -1, "Ion", ionCode);
+  }
+  ionCode = 202212;
+  if (!db->GetParticle(ionCode)) {
+    db->AddParticle("p(1440)+", "p(1440)+", 1.793, kFALSE, 0.350, 1, "Ion", ionCode);
+  }
+
   // Xi-/+ (1820)
   ionCode = 123314;
   if (!db->GetParticle(ionCode)) {