[12.6.X] Ensure that egamma picks up 2023 HB thresholds for 12_6_X MC production

Configuration/Eras/python/Era_Run3_2023_cff.py

@@ -0,0 +1,20 @@
+import FWCore.ParameterSet.Config as cms
+
+from Configuration.Eras.Era_Run2_2018_cff import Run2_2018
+from Configuration.Eras.Modifier_run3_common_cff import run3_common
+from Configuration.Eras.Modifier_run3_GEM_cff import run3_GEM
+from Configuration.Eras.Modifier_run3_HB_cff import run3_HB
+from Configuration.Eras.Modifier_run3_HFSL_cff import run3_HFSL
+from Configuration.Eras.Modifier_run2_GEM_2017_cff import run2_GEM_2017
+from Configuration.Eras.Modifier_stage2L1Trigger_2021_cff import stage2L1Trigger_2021
+from Configuration.Eras.Modifier_ctpps_2018_cff import ctpps_2018
+from Configuration.Eras.Modifier_ctpps_2022_cff import ctpps_2022
+from Configuration.ProcessModifiers.dd4hep_cff import dd4hep
+from Configuration.Eras.Modifier_run3_egamma_cff import run3_egamma
+from Configuration.Eras.Modifier_run2_egamma_2018_cff import run2_egamma_2018
+from Configuration.Eras.Modifier_run3_RPC_cff import run3_RPC
+from Configuration.Eras.Modifier_run3_egamma_2023_cff import run3_egamma_2023
+
+Run3_2023 = cms.ModifierChain(Run2_2018.copyAndExclude([run2_GEM_2017, ctpps_2018, run2_egamma_2018]),
+                         run3_common, run3_egamma, run3_egamma_2023, run3_GEM, run3_HB, run3_HFSL, stage2L1Trigger_2021, ctpps_2022, dd4hep, run3_RPC)
+

Configuration/Eras/python/Modifier_run3_egamma_2023_cff.py

@@ -0,0 +1,3 @@
+import FWCore.ParameterSet.Config as cms
+
+run3_egamma_2023 =cms.Modifier()

Configuration/StandardSequences/python/Eras.py

@@ -34,6 +34,7 @@ def __init__(self):
                  'Run2_2018_highBetaStar',
                  'Run2_2018_noMkFit',
                  'Run3',
+                 'Run3_2023',
                  'Run3_noMkFit',
                  'Run3_pp_on_PbPb',
                  'Run3_pp_on_PbPb_approxSiStripClusters',

RecoEgamma/EgammaIsolationAlgos/python/egammaHBHERecHitThreshold_cff.py

@@ -1,10 +1,17 @@
 import FWCore.ParameterSet.Config as cms
 
-from RecoParticleFlow.PFClusterProducer.particleFlowRecHitHBHE_cfi import _thresholdsHBphase1, _thresholdsHEphase1
+from RecoParticleFlow.PFClusterProducer.particleFlowRecHitHBHE_cfi import _thresholdsHBphase1, _thresholdsHEphase1, _thresholdsHBphase1_2023
 
 egammaHBHERecHit = cms.PSet(
     hbheRecHits = cms.InputTag('hbhereco'),
     recHitEThresholdHB = _thresholdsHBphase1,
     recHitEThresholdHE = _thresholdsHEphase1,
     maxHcalRecHitSeverity = cms.int32(9),
 )
+
+egammaHBHERecHit_2023 = egammaHBHERecHit.clone(
+    recHitEThresholdHB = _thresholdsHBphase1_2023
+)
+
+from Configuration.Eras.Modifier_run3_egamma_2023_cff import run3_egamma_2023
+run3_egamma_2023.toReplaceWith(egammaHBHERecHit,egammaHBHERecHit_2023)

RecoParticleFlow/PFClusterProducer/python/particleFlowRecHitHBHE_cfi.py

@@ -4,6 +4,8 @@
 _thresholdsHE = cms.vdouble(0.8, 0.8, 0.8, 0.8, 0.8, 0.8, 0.8)
 _thresholdsHBphase1 = cms.vdouble(0.1, 0.2, 0.3, 0.3)
 _thresholdsHEphase1 = cms.vdouble(0.1, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2)
+#updated HB RecHit threshold for 2023
+_thresholdsHBphase1_2023 = cms.vdouble(0.4, 0.3, 0.3, 0.3)
 
 particleFlowRecHitHBHE = cms.EDProducer("PFRecHitProducer",
     navigator = cms.PSet(