diff --git a/Kernel/PartProp/CMakeLists.txt b/Kernel/PartProp/CMakeLists.txt
index 839807b28b5a4239a5f9c6f3987e197779427b0f..4faad328b3f4a273ddfbc188dee3ee72eb02778e 100644
--- a/Kernel/PartProp/CMakeLists.txt
+++ b/Kernel/PartProp/CMakeLists.txt
@@ -23,7 +23,6 @@ gaudi_add_library(PartPropLib
         src/ParticleID.cpp
         src/ParticleProperty.cpp
         src/Symbols.cpp
-        src/TrackDefaultParticles.cpp
         src/iNode.cpp
     LINK
         PUBLIC
diff --git a/Kernel/PartProp/include/Kernel/TrackDefaultParticles.h b/Kernel/PartProp/include/Kernel/TrackDefaultParticles.h
index 98b725f207feb0650ba89acbc01acccff8bce153..209a3821dabf0d5bd3fced7d366e581ca28f4945 100644
--- a/Kernel/PartProp/include/Kernel/TrackDefaultParticles.h
+++ b/Kernel/PartProp/include/Kernel/TrackDefaultParticles.h
@@ -20,9 +20,9 @@
 namespace LHCb {
   namespace Tr {
     class PID {
-      enum class validated_pid_t { Electron = 0, Muon, Pion, Kaon, Proton, Xi, Omega, hypertriton };
-      static constexpr std::array<double, 8> s_mass = { 0.51099891, 105.65837, 139.57018, 493.677,
-                                                        938.27203,  1321.71,   1672.45,   2991.17 };
+      enum class validated_pid_t { Electron = 0, Muon, Pion, Kaon, Proton, Sigmap, Sigmam, Xi, Omega, hypertriton };
+      inline static constexpr auto s_mass = std::array<double, 10>{
+          0.51099891, 105.65837, 139.57018, 493.677, 938.27203, 1197.449, 1189.37, 1321.71, 1672.45, 2991.17 };
 
       validated_pid_t m_value;
 
@@ -38,6 +38,10 @@ namespace LHCb {
           return validated_pid_t::Kaon;
         case 2212:
           return validated_pid_t::Proton;
+        case 3112:
+          return validated_pid_t::Sigmam;
+        case 3222:
+          return validated_pid_t::Sigmap;
         case 3312:
           return validated_pid_t::Xi;
         case 3334:
@@ -67,6 +71,10 @@ namespace LHCb {
 
       static constexpr PID Proton() { return PID{ validated_pid_t::Proton }; }
 
+      static constexpr PID Sigmap() { return PID{ validated_pid_t::Sigmap }; }
+
+      static constexpr PID Sigmam() { return PID{ validated_pid_t::Sigmam }; }
+
       static constexpr PID Xi() { return PID{ validated_pid_t::Xi }; }
 
       static constexpr PID Omega() { return PID{ validated_pid_t::Omega }; }
@@ -86,6 +94,10 @@ namespace LHCb {
           return "Kaon";
         case validated_pid_t::Proton:
           return "Proton";
+        case validated_pid_t::Sigmap:
+          return "Sigma+";
+        case validated_pid_t::Sigmam:
+          return "Sigma-";
         case validated_pid_t::Xi:
           return "Xi";
         case validated_pid_t::Omega:
@@ -103,7 +115,8 @@ namespace LHCb {
       friend std::ostream& operator<<( std::ostream& os, const PID& pid ) { return toStream( pid, os ); }
 
       friend StatusCode parse( PID& pid, const std::string& in ) {
-        for ( PID ref : { Electron(), Muon(), Pion(), Kaon(), Proton(), Xi(), Omega(), hypertriton() } ) {
+        for ( PID ref :
+              { Electron(), Muon(), Pion(), Kaon(), Proton(), Sigmap(), Sigmam(), Xi(), Omega(), hypertriton() } ) {
           if ( in != toString( ref ) ) continue;
           pid = ref;
           return StatusCode::SUCCESS;
@@ -124,6 +137,10 @@ namespace LHCb {
 
       constexpr bool isProton() const { return validated_pid_t::Proton == m_value; }
 
+      constexpr bool isSigmap() const { return validated_pid_t::Sigmap == m_value; }
+
+      constexpr bool isSigmam() const { return validated_pid_t::Sigmam == m_value; }
+
       constexpr bool isXi() const { return validated_pid_t::Xi == m_value; }
 
       constexpr bool isOmega() const { return validated_pid_t::Omega == m_value; }
diff --git a/Kernel/PartProp/src/TrackDefaultParticles.cpp b/Kernel/PartProp/src/TrackDefaultParticles.cpp
deleted file mode 100644
index 7721503c8a6c12a0516cf4055a3293ac688e94e4..0000000000000000000000000000000000000000
--- a/Kernel/PartProp/src/TrackDefaultParticles.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-/*****************************************************************************\
-* (c) Copyright 2000-2018 CERN for the benefit of the LHCb Collaboration      *
-*                                                                             *
-* This software is distributed under the terms of the GNU General Public      *
-* Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   *
-*                                                                             *
-* In applying this licence, CERN does not waive the privileges and immunities *
-* granted to it by virtue of its status as an Intergovernmental Organization  *
-* or submit itself to any jurisdiction.                                       *
-\*****************************************************************************/
-#include "Kernel/TrackDefaultParticles.h"
-
-constexpr std::array<double, 8> LHCb::Tr::PID::s_mass;