HowToWriteaDST < LHCb

########################################################################<br />from Gaudi.Configuration import *<br />from Configurables import DecayTreeTuple, PhysDesktop<br />from Configurables import CombineParticles, FilterDesktop<br />from Configurables import TupleToolTrigger, BackgroundCategory, TupleToolTISTOS<br />from Configurables import DaVinci,HltSelReportsDecoder,HltVertexReportsDecoder,HltDecReportsDecoder<br />from Configurables import CombineParticles, PhysDesktop<br />from PhysSelPython.Wrappers import Selection, SelectionSequence, DataOnDemand<br /><br />#<br /># MC matching<br />#<br /><br />matchkaonFromD0 = "(mcMatch('[D0 -&gt; ^K- pi+]CC'))"<br />matchpionFromD0 = "(mcMatch('[D0 -&gt; K- ^pi+]CC'))"<br />matchkaonFromKst = "(mcMatch('[K*(892)0 -&gt; ^K+ pi-]CC'))"<br />matchpionFromKst = "(mcMatch('[K*(892)0 -&gt; K+ ^pi-]CC'))"<br />matchD0 = "(mcMatch('Beauty =&gt; =^D0 K*(892)~0'))"<br />matchD0bar = "(mcMatch('Beauty =&gt; ^D~0 K*(892)0'))"<br />matchKst = "(mcMatch('Beauty =&gt; D~0 ^K*(892)0'))"<br />matchKstbar = "(mcMatch('Beauty =&gt; D0 ^K*(892)~0'))"<br /><br />#<br /># Create selection sequence<br />#<br /><br />_pions = DataOnDemand(Location='Phys/StdNoPIDsPions')<br />_kaons = DataOnDemand(Location='Phys/StdNoPIDsKaons')<br /><br />_d2hh = CombineParticles("d2hh")<br />_d2hh.DecayDescriptor = "[D0 -&gt; K- pi+]cc"<br />_d2hh.DaughtersCuts = { "K-" : matchkaonFromD0 , "pi+" : matchpionFromD0 }<br />_d2hh.MotherCut = "(VFASPF(VCHI2/VDOF)&lt;100)"<br />_d2hh.Preambulo = [<br /> "from LoKiPhysMC.decorators import *",<br /> "from PartProp.Nodes import CC" ]<br /><br />SelD2hh = Selection( "SelD2hh",<br /> Algorithm== _d2hh,<br /> RequiredSelections=[_pions,_kaons] ) <br /><br />_kst2hh = CombineParticles("kst2hh")<br />_kst2hh.DecayDescriptor = "[K*(892)0 -&gt; K+ pi-]cc"<br />_kst2hh.DaughtersCuts = { "K-" : matchkaonFromKst , "pi+" : matchpionFromKst }<br />_kst2hh.MotherCut = "(VFASPF(VCHI2/VDOF)&lt;100)"<br />_kst2hh.Preambulo = [<br /> "from LoKiPhysMC.decorators import *",<br /> "from PartProp.Nodes import CC" ]<br /><br />SelKst2hh = Selection( "SelKst2hh",<br /> Algorithm= _kst2hh,<br /> RequiredSelections=[_pions,_kaons] )<br /><br />_b2dkst = CombineParticles("b2dkst")<br />_b2dkst.DecayDescriptor = "[B0 -&gt; D~0 K*(892)0]cc"<br />_b2dkst.DaughtersCuts = { "D0" : "("+matchD0+" | "+matchD0bar+")" , "K*(892)0" : "("+matchKst+" | "+matchKstbar+")" }<br />_b2dkst.MotherCut = "(VFASPF(VCHI2/VDOF)&lt;100)"<br />_b2dkst.Preambulo = [<br /> "from LoKiPhysMC.decorators import *",<br /> "from PartProp.Nodes import CC" ]<br /><br />SelB2D0Kst = Selection( "SelB2D0Kst",<br /> Algorithm = _b2dkst,<br /> RequiredSelections=[SelD2hh,SelKst2hh] )<br /><br />SeqB2D0Kst = SelectionSequence('SeqB2D0Kst',TopSelection = SelB2D0Kst) <br /><br />#<br /># Make the tuple for validation<br />#<br /><br />B2D0Kst_FromMC_Tree = DecayTreeTuple("B2D0Kst_FromMC_Tree")<br />B2D0Kst_FromMC_Tree.InputLocations = ["/Event/Phys/B2D0Kstar"]<br />B2D0Kst_FromMC_Tree.Decay = "[[B0]cc =&gt; (^D~0 =&gt; ^K+ ^pi-) (^K*(892)0 =&gt; ^K+ ^pi-)]cc"<br />B2D0Kst_FromMC_Tree.ToolList = ["TupleToolKinematic",<br /> "TupleToolPid",<br /> "TupleToolGeometry",<br /> "TupleToolPrimaries",<br /> "TupleToolTrackInfo",<br /> "TupleToolPropertime"]<br />B2D0Kst_FromMC_Tree.UseLabXSyntax = True<br />B2D0Kst_FromMC_Tree.RevertToPositiveID = False<br /><br />#<br /># Write DST<br />#<br /><br />from Configurables import SelDSTWriter, DaVinci<br /><br />dstWriter = SelDSTWriter("B2D0Kst_FromMC_Writer",<br /> SelectionSequences = [SeqB2D0Kst],<br /> OutputFileSuffix = '/tmp/edsmith/B02D0Kst_MC2010magdown11164011') %RED%#actually a prefix, will be followed by ".SeqB2D0Kst.dst" %ENDCOLOR%

#<br /># Configure DaVinci<br />#<br /><br />from Configurables import DaVinci<br />DaVinci().EvtMax = -1 # Number of events<br />DaVinci().SkipEvents = 0 # Events to skip<br />DaVinci().PrintFreq = 1000<br />DaVinci().DataType = "2010" # Default is "DC06"<br />DaVinci().Simulation = True<br />DaVinci().HistogramFile = "dummy_histos.root" # Histogram file<br />DaVinci().TupleFile = "dummy_tuple.root" # Ntuple<br />DaVinci().UserAlgorithms = [SeqB2D0Kst.sequence(),B2D0Kst_FromMC_Tree,dstWriter.sequence()]<br />#DaVinci().UserAlgorithms = [SeqB2D0Kst.sequence(),dstWriter.sequence()]<br />DaVinci().RedoMCLinks = True<br />DaVinci().EnableUnpack = True <br />DaVinci().CondDBtag = "sim-20100831-vc-mu100"<br />DaVinci().DDDBtag = "head-20100119"<br />DaVinci().MainOptions = '&lt;DATA&gt;.py' %RED%#here you put the data you want to make a dst from%ENDCOLOR%

# Use the CondDB to get the right database tags <br />from Configurables import CondDB<br />CondDB(UseOracle = False, DisableLFC = True, IgnoreHeartBeat = True)

-- Main.EdmundSmith - 2010-12-09
This topic: LHCb > WebHome > ComputingResources > HowTos > HowToWriteaDST
Topic revision: r1 - 2010-12-09 - EdmundSmith