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[12_2_X] Add VtxSmearing scenario for 2021 PilotBeams #36440

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Dec 12, 2021
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[12_2_X] Add VtxSmearing scenario for 2021 PilotBeams #36440

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1 change: 1 addition & 0 deletions Configuration/StandardSequences/python/VtxSmeared.py
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Expand Up @@ -65,6 +65,7 @@
'Run3RoundOptics25ns13TeVHighSigmaZ' : 'IOMC.EventVertexGenerators.VtxSmearedRun3RoundOptics25ns13TeVHighSigmaZ_cfi',
'Run3FlatOpticsGaussSigmaZ4p2cm' : 'IOMC.EventVertexGenerators.VtxSmearedRun3FlatOpticsGaussSigmaZ4p2cm_cfi',
'Run3FlatOpticsGaussSigmaZ5p3cm' : 'IOMC.EventVertexGenerators.VtxSmearedRun3FlatOpticsGaussSigmaZ5p3cm_cfi',
'Realistic25ns900GeV2021Collision' : 'IOMC.EventVertexGenerators.VtxSmearedRealistic25ns900GeV2021Collision_cfi',
}
VtxSmearedDefaultKey='Realistic50ns13TeVCollision'
VtxSmearedHIDefaultKey='RealisticPbPbCollision2018'
32 changes: 32 additions & 0 deletions IOMC/EventVertexGenerators/python/VtxSmearedParameters_cfi.py
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Expand Up @@ -748,6 +748,38 @@
Z0 = cms.double(0.035748 )
)

# From Run3 PilotBeams 2021 3.8T data
# BS parameters extracted from run 346512, fill 7531 (from ExpressPhysics FEVT, Legacy BS):
# X0 = 0.174282 [cm]
# Y0 = -0.187132 [cm]
# Z0 = 0.167616 [cm]
# sigmaZ0 = 6.80728 [cm]
# BeamWidthX 0.0142174
# BeamWidthY 0.0150789
#
# set SigmaZ0 = 6.8 [cm]
# set BeamWidthX = BeamWidthY = 150.0 [um]
# set beta* = 1100 cm
# energy = 900 GeV
# From LHC calculator, emittance is 4.762e-8 cm
# https://lpc.web.cern.ch/lpc/lumi2.html
#
# BPIX absolute position (https://twiki.cern.ch/twiki/bin/view/CMS/TkAlignmentPixelPosition?rev=40#2021):
# X = 0.06076 cm
# Y = -0.14702 cm
# Z = -0.25616 cm
Realistic25ns900GeV2021CollisionVtxSmearingParameters = cms.PSet(
Phi = cms.double(0.0),
BetaStar = cms.double(1100.0),
Emittance = cms.double(4.169e-7),
Alpha = cms.double(0.0),
SigmaZ = cms.double(6.8),
TimeOffset = cms.double(0.0),
X0 = cms.double(0.113522),
Y0 = cms.double(-0.040112),
Z0 = cms.double(0.423776)
)

# Test HF offset
ShiftedCollision2015VtxSmearingParameters = cms.PSet(
Phi = cms.double(0.0),
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7 changes: 7 additions & 0 deletions IOMC/EventVertexGenerators/python/VtxSmearedRealistic25ns900GeV2021Collision_cfi.py
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@@ -0,0 +1,7 @@
import FWCore.ParameterSet.Config as cms

from IOMC.EventVertexGenerators.VtxSmearedParameters_cfi import Realistic25ns900GeV2021CollisionVtxSmearingParameters,VtxSmearedCommon
VtxSmeared = cms.EDProducer("BetafuncEvtVtxGenerator",
Realistic25ns900GeV2021CollisionVtxSmearingParameters,
VtxSmearedCommon
)