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update an estimate vertex smearing parameters for 2025 OO MC #48101

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Merged
cmsbuild merged 2 commits into from
May 17, 2025
Merged

update an estimate vertex smearing parameters for 2025 OO MC #48101

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7bd85f3
update vertex smearing parameters for 2025 OO collsion
ashleyahram May 16, 2025
b5c8562
update vertex smearing parameters for 2025 OO collsion
ashleyahram May 16, 2025
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1 change: 1 addition & 0 deletions Configuration/StandardSequences/python/VtxSmeared.py
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Original file line number Diff line number Diff line change
Expand Up @@ -75,5 +75,6 @@
'Realistic2023PbPbCollision' : 'IOMC.EventVertexGenerators.VtxSmearedRealistic2023PbPbCollision_cfi',
'Realistic2024ppRefCollision' : 'IOMC.EventVertexGenerators.VtxSmearedRealistic2024ppRefCollision_cfi',
'Realistic2024PbPbCollision' : 'IOMC.EventVertexGenerators.VtxSmearedRealistic2024PbPbCollision_cfi',
'Nominal2025OOCollision' : 'IOMC.EventVertexGenerators.VtxSmearedNominal2025OOCollision_cfi',
}
VtxSmearedDefaultKey='DBrealistic'
7 changes: 7 additions & 0 deletions IOMC/EventVertexGenerators/python/VtxSmearedNominal2025OOCollision_cfi.py
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@@ -0,0 +1,7 @@
import FWCore.ParameterSet.Config as cms

from IOMC.EventVertexGenerators.VtxSmearedParameters_cfi import Nominal2025OOCollisionVtxSmearingParameters,VtxSmearedCommon
VtxSmeared = cms.EDProducer("BetafuncEvtVtxGenerator",
Nominal2025OOCollisionVtxSmearingParameters,
VtxSmearedCommon
)
13 changes: 13 additions & 0 deletions IOMC/EventVertexGenerators/python/VtxSmearedParameters_cfi.py
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Expand Up @@ -1097,6 +1097,19 @@
Z0 = cms.double(0.2290316)
)

# Estimate for the 2025 OO beam conditions, based on the 2024 PbPb beam width parameters from Realistic2024PbPbCollisionVtxSmearingParameters with the pp beam centroid from runs 392109 and 392112
Nominal2025OOCollisionVtxSmearingParameters = cms.PSet(
Phi = cms.double(0.0),
BetaStar = cms.double(50),
Emittance = cms.double(6.684e-08),
Alpha = cms.double(0.0),
SigmaZ = cms.double(4.9068349),
TimeOffset = cms.double(0.0),
X0 = cms.double(0.0184194),
Y0 = cms.double(-0.0141852),
Z0 = cms.double(0.3423956)
)

# Parameters for HL-LHC operation at 13TeV
HLLHCVtxSmearingParameters = cms.PSet(
MeanXIncm = cms.double(0.),
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