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Realistic vertex smearing for 2015 PbPb MC (81X) #15224

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merged 2 commits into from Jul 20, 2016
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Realistic vertex smearing for 2015 PbPb MC (81X) #15224

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969aa5c
Update vertex smearing parameters for 2015 PbPb
mandrenguyen Jul 18, 2016
eec613a
don't use pound sign in comment
mandrenguyen Jul 19, 2016
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2 changes: 1 addition & 1 deletion Configuration/StandardSequences/python/VtxSmeared.py
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Expand Up @@ -38,7 +38,7 @@
'Shifted15mmCollision2015' : 'IOMC.EventVertexGenerators.VtxSmearedShifted15mmCollision2015_cfi',
'NominalCollision2015' : 'IOMC.EventVertexGenerators.VtxSmearedNominalCollision2015_cfi',
'NominalHICollision2015': 'IOMC.EventVertexGenerators.VtxSmearedNominalHICollision2015_cfi',
'UpdatedHICollision2015': 'IOMC.EventVertexGenerators.VtxSmearedUpdatedHICollision2015_cfi',
'RealisticHICollision2015': 'IOMC.EventVertexGenerators.VtxSmearedRealisticHICollision2015_cfi',
'ZeroTeslaRun247324Collision' : 'IOMC.EventVertexGenerators.VtxSmearedZeroTeslaRun247324Collision_cfi',
'Realistic50ns13TeVCollisionZeroTesla': 'IOMC.EventVertexGenerators.VtxSmearedRealistic50ns13TeVCollisionZeroTesla_cfi',
'Realistic50ns13TeVCollision': 'IOMC.EventVertexGenerators.VtxSmearedRealistic50ns13TeVCollision_cfi',
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15 changes: 7 additions & 8 deletions IOMC/EventVertexGenerators/python/VtxSmearedParameters_cfi.py
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Expand Up @@ -537,18 +537,17 @@
Z0 = cms.double(0.)
)

# Update based on latest beta* presented at the WGM
# Beamspot centroid updated to according to the current pp conditions (Realistic50ns13TeVCollisionZeroTesla)
UpdatedHICollision2015VtxSmearingParameters = cms.PSet(
# updated numbers based on beamspot fits to 2015 PbPb data
RealisticHICollision2015VtxSmearingParameters = cms.PSet(
Phi = cms.double(0.0),
BetaStar = cms.double(80.0),
BetaStar = cms.double(60.0),
Emittance = cms.double(1.70e-07),
Alpha = cms.double(0.0),
SigmaZ = cms.double(7.06),
SigmaZ = cms.double(5.2278),
TimeOffset = cms.double(0.0),
X0 = cms.double(0.08533),
Y0 = cms.double(0.16973),
Z0 = cms.double(-1.2230)
X0 = cms.double(0.1025),
Y0 = cms.double(0.1654),
Z0 = cms.double(3.2528)
)

# Estimate for 2015 pp collisions at 5.02 TeV, based on feedback from accelerator: beta* ~ 400cm, normalized emittance = 2.5 um, SigmaZ similar to RunIIWinter15GS
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4 changes: 2 additions & 2 deletions ...n/VtxSmearedUpdatedHICollision2015_cfi.py → ...VtxSmearedRealisticHICollision2015_cfi.py
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@@ -1,8 +1,8 @@
import FWCore.ParameterSet.Config as cms

from IOMC.EventVertexGenerators.VtxSmearedParameters_cfi import UpdatedHICollision2015VtxSmearingParameters,VtxSmearedCommon
from IOMC.EventVertexGenerators.VtxSmearedParameters_cfi import RealisticHICollision2015VtxSmearingParameters,VtxSmearedCommon
VtxSmeared = cms.EDProducer("BetafuncEvtVtxGenerator",
UpdatedHICollision2015VtxSmearingParameters,
RealisticHICollision2015VtxSmearingParameters,
VtxSmearedCommon
)

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