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  • Committer: Marco Zaro
  • Date: 2014-01-27 16:54:10 UTC
  • mfrom: (78.124.55 MG5_aMC_2.1)
  • Revision ID: marco.zaro@gmail.com-20140127165410-5lma8c2hzbzm426j
merged with lp:~maddevelopers/madgraph5/MG5_aMC_2.1 r 267

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Template/NLO/MCatNLO/srcPythia/reweight0.inc
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c Common blocks for NLO or aMC@NLO reweighting
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c Conventions for array relevant to NLO computations:
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c   i=1,2,3,4  -> event, soft, collinear, soft-collinear
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c   ==>  i = icountevts+2 for counterevents
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c The following is introduced since this file may be included in codes
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c that need not know nexternal. Make sure that maxparticles>=nexternal
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      integer maxparticles
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      parameter (maxparticles=20)
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c Reference weight and Ellis-Sexton scales
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      double precision wgtref,wgtqes2(4)
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      common/cwgt0/wgtref,wgtqes2
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c Bjorken x's
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      double precision wgtxbj(2,4)
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      common/cwgt1/wgtxbj
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c Kinematic configurations
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      double precision wgtkinE(0:3,maxparticles,4)
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      common/cwgt2E/wgtkinE
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c Reference renormalization and factorization scales squared
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      double precision wgtmuR2(4),wgtmuF12(4),wgtmuF22(4)
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      common/cwgt2mu/wgtmuR2,wgtmuF12,wgtmuF22
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c Real-emission weights, scale independent
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      double precision wgtwreal(4)
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      common/cwgt3/wgtwreal
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c (n+1)-body degenerate weights, scale independent
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      double precision wgtwdeg(4)
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      common/cwgt4/wgtwdeg
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c (n+1)-body degenerate weights, muF dependence
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      double precision wgtwdegmuf(4)
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      common/cwgt5/wgtwdegmuf
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c n-body weights: Born, n-body NLO scale independent,
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c   n-body NLO scale muF dependence, n-body NLO scale muR dependence
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      double precision wgtwborn(2:2),wgtwns(2:2),
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     #                 wgtwnsmuf(2:2),wgtwnsmur(2:2)
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      common/cwgt6/wgtwborn,wgtwns,wgtwnsmuf,wgtwnsmur
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c MC stuff: MC counterterms proper, and Bjorken x's
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      double precision wgtwmcxsecE(maxparticles),
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     #                 wgtmcxbjE(2,maxparticles)
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      common/cwgt7E/wgtwmcxsecE,wgtmcxbjE
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c MC stuff: number of father's colour partners
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      integer iwgtnumpartn
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      common/cwgt8/iwgtnumpartn
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c Auxiliary quantities used when writing events
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      integer jwgtinfo,mexternal
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      common/cwgtaux0/jwgtinfo,mexternal
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c
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c Cross sections after variations of scales and PDFs
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c
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      integer maxscales,maxPDFs
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      parameter (maxscales=3)
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      parameter (maxPDFs=200)
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c Number of scale factors (for each scale) and PDF error pairs
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      integer numscales,numPDFpairs
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      common/cwgxsec1/numscales,numPDFpairs
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c Cross sections at different scales and PDFs
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      double precision wgtxsecmu(maxscales,maxscales),
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     #                 wgtxsecPDF(0:maxPDFs)
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      common/cwgxsec2/wgtxsecmu,wgtxsecPDF