applied gain calibration scheme update at HLT as well

HLTrigger/Configuration/python/customizeHLTforCMSSW.py

@@ -170,10 +170,25 @@ def customiseFor2017DtUnpacking(process):
 
     return process
 
+
+# Update Pixel Gain calibration scheme for Run3 (PR #29333)
+def customiseFor29333(process):
+    for producer in producers_by_type(process, "SiPixelClusterProducer"):
+        # For Run3, change in the gain calibration scheme,
+        # to include the VCal conversion factors directly in the SiPixelGainCalibration DB object
+        # full details at: https://indico.cern.ch/event/879470/contributions/3796405/attachments/2009273/3356603/pix_off_25_3_gain_calibration_mc.pdf
+        producer.VCaltoElectronGain      = cms.int32(1) # all gains=1, pedestals=0
+        producer.VCaltoElectronGain_L1   = cms.int32(1)
+        producer.VCaltoElectronOffset    = cms.int32(0)
+        producer.VCaltoElectronOffset_L1 = cms.int32(0)
+
+    return process
+
 # CMSSW version specific customizations
 def customizeHLTforCMSSW(process, menuType="GRun"):
 
     # add call to action function in proper order: newest last!
     # process = customiseFor12718(process)
+    process = customiseFor29333(process)
 
     return process