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double precision function testamp(p)
c*****************************************************************************
c Approximates matrix element by propagators
c*****************************************************************************
implicit none
c
c Constants
c
include 'genps.inc'
include 'maxconfigs.inc'
include 'nexternal.inc'
double precision zero
parameter (zero = 0d0)
c
c Arguments
c
double precision p(0:3,nexternal)
c integer iconfig
c
c Local
c
double precision xp(0:3,-nexternal:nexternal)
double precision mpole(-nexternal:0),shat,tsgn
integer i,j,iconfig
double precision prmass(-nexternal:0,lmaxconfigs)
double precision prwidth(-nexternal:0,lmaxconfigs)
integer pow(-nexternal:0,lmaxconfigs)
logical first_time
c
c Global
c
integer iforest(2,-max_branch:-1,lmaxconfigs)
common/to_forest/ iforest
integer mapconfig(0:lmaxconfigs), this_config
common/to_mconfigs/mapconfig, this_config
include 'coupl.inc'
c
c External
c
double precision dot
save prmass,prwidth,pow
data first_time /.true./
c-----
c Begin Code
c-----
iconfig = this_config
if (first_time) then
c include 'props.inc'
first_time=.false.
endif
do i=1,nexternal
mpole(-i)=0d0
do j=0,3
xp(j,i)=p(j,i)
enddo
enddo
c mpole(-3) = 174**2
c shat = dot(p(0,1),p(0,2))/(1800)**2
shat = dot(p(0,1),p(0,2))/(10)**2
c shat = 1d0
testamp = 1d0
tsgn = +1d0
do i=-1,-(nexternal-3),-1 !Find all the propagotors
if (iforest(1,i,iconfig) .eq. 1) tsgn=-1d0
do j=0,3
xp(j,i) = xp(j,iforest(1,i,iconfig))
$ +tsgn*xp(j,iforest(2,i,iconfig))
enddo
if (prwidth(i,iconfig) .ne. 0d0 .and. .false.) then
testamp=testamp/((dot(xp(0,i),xp(0,i))
$ -prmass(i,iconfig)**2)**2
$ -(prmass(i,iconfig)*prwidth(i,iconfig))**2)
else
testamp = testamp/((dot(xp(0,i),xp(0,i)) -
$ prmass(i,iconfig)**2)
$ **(pow(i,iconfig)))
endif
testamp=testamp*shat**(pow(i,iconfig))
c write(*,*) i,iconfig,pow(i,iconfig),prmass(i,iconfig)
enddo
c testamp = 1d0/dot(xp(0,-1),xp(0,-1))
testamp=abs(testamp)
c testamp = 1d0
end
logical function cut_bw(p)
c*****************************************************************************
c Approximates matrix element by propagators
c*****************************************************************************
implicit none
c
c Constants
c
include 'genps.inc'
include 'maxconfigs.inc'
include 'nexternal.inc'
double precision zero
parameter (zero = 0d0)
include 'run.inc'
c
c Arguments
c
double precision p(0:3,nexternal)
c
c Local
c
double precision xp(0:3,-nexternal:nexternal)
double precision mpole(-nexternal:0),shat,tsgn
integer i,j,iconfig,iproc
double precision prmass(-nexternal:0,lmaxconfigs)
double precision prwidth(-nexternal:0,lmaxconfigs)
integer pow(-nexternal:0,lmaxconfigs)
logical first_time, onshell
double precision xmass
integer nbw
integer ida(2),idenpart
c
c Global
c
include 'maxamps.inc'
integer iforest(2,-max_branch:-1,lmaxconfigs)
common/to_forest/ iforest
integer sprop(maxsproc,-max_branch:-1,lmaxconfigs)
integer tprid(-max_branch:-1,lmaxconfigs)
common/to_sprop/sprop,tprid
integer mapconfig(0:lmaxconfigs), this_config
common/to_mconfigs/mapconfig, this_config
integer lbw(0:nexternal) !Use of B.W.
common /to_BW/ lbw
logical OnBW(-nexternal:0) !Set if event is on B.W.
common/to_BWEvents/ OnBW
include 'coupl.inc'
integer idup(nexternal,maxproc,maxsproc)
integer mothup(2,nexternal)
integer icolup(2,nexternal,maxflow,maxsproc)
include 'leshouche.inc'
integer gForceBW(-max_branch:-1,lmaxconfigs) ! Forced BW
include 'decayBW.inc'
c
c External
c
double precision dot
save prmass,prwidth,pow
data first_time /.true./
c-----
c Begin Code
c-----
cut_bw = .false. !Default is we passed the cut
iconfig = this_config
if (first_time) then
include 'props.inc'
nbw = 0
do i=-1,-(nexternal-3),-1
if (iforest(1,i,iconfig) .eq. 1 .or. prwidth(i,iconfig).le.0) then
cycle
endif
nbw=nbw+1
if (lbw(nbw) .eq. 1) then
write(*,*) 'Requiring BW ',i,nbw
elseif(lbw(nbw) .eq. 2) then
write(*,*) 'Excluding BW ',i,nbw
else
write(*,*) 'No cut BW ',i,nbw
endif
enddo
first_time=.false.
endif
do i=1,nexternal
mpole(-i)=0d0
do j=0,3
xp(j,i)=p(j,i)
enddo
enddo
nbw = 0
tsgn = +1d0
c Find non-zero process number
do iproc=1,maxsproc
if(sprop(iproc,-1,iconfig).ne.0) goto 10
enddo
10 continue
c If no non-zero sprop, set iproc to 1
if(iproc.gt.maxsproc) iproc=1
c Start loop over propagators
do i=-1,-(nexternal-3),-1
onbw(i) = .false.
if (iforest(1,i,iconfig) .eq. 1) tsgn=-1d0
do j=0,3
xp(j,i) = xp(j,iforest(1,i,iconfig))
$ +tsgn*xp(j,iforest(2,i,iconfig))
enddo
if (tsgn .lt. 0d0) cycle
if (prwidth(i,iconfig) .gt. 0d0 ) then !This is B.W.
nbw=nbw+1
c write(*,*) 'Checking BW',nbw
xmass = sqrt(dot(xp(0,i),xp(0,i)))
c write(*,*) 'xmass',xmass,prmass(i,iconfig)
c
c Here we set if the BW is "on-shell" for LesHouches
c
onshell = (abs(xmass - prmass(i,iconfig)) .lt.
$ bwcutoff*prwidth(i,iconfig))
if(onshell)then
c Remove on-shell forbidden s-channels (gForceBW=2) (JA 2/10/11)
if(gForceBW(i,iconfig).eq.2) then
cut_bw = .true.
return
endif
c Only allow OnBW if no "decay" to identical particle
OnBW(i) = .true.
idenpart=0
do j=1,2
ida(j)=iforest(j,i,iconfig)
if(ida(j).lt.0) then
if(sprop(iproc,i,iconfig).eq.sprop(iproc,ida(j),iconfig))
$ idenpart=ida(j)
elseif (ida(j).gt.0) then
if(sprop(iproc,i,iconfig).eq.IDUP(ida(j),1,iproc))
$ idenpart=ida(j)
endif
enddo
c Always remove if daughter final-state
if(idenpart.gt.0) then
OnBW(i)=.false.
c Else remove if daughter forced to be onshell
elseif(idenpart.lt.0)then
if(gForceBW(idenpart, iconfig).eq.1) then
OnBW(i)=.false.
c Else remove daughter if forced to be onshell
elseif(gForceBW(i, iconfig).eq.1) then
OnBW(idenpart)=.false.
c Else remove either this resonance or daughter, which is closer to mass shell
elseif(abs(xmass-prmass(i,iconfig)).gt.
$ abs(sqrt(dot(xp(0,idenpart),xp(0,idenpart)))-
$ prmass(i,iconfig))) then
OnBW(i)=.false.
c Else remove OnBW for daughter
else
OnBW(idenpart)=.false.
endif
endif
else if (gForceBW(i, iconfig).eq.1) then ! .not. onshell
c Check if we are supposed to cut forced bw (JA 4/8/11)
cut_bw = .true.
c write(*,*) 'cut_bw: ',i,gForceBW(i,iconfig),OnBW(i),cut_bw
return
endif
c
c Here we set onshell for phase space integration (JA 4/8/11)
c
onshell = (abs(xmass - prmass(i,iconfig)) .lt.
$ 5d0*prwidth(i,iconfig))
if (onshell .and. (lbw(nbw).eq. 2) .or.
$ .not. onshell .and. (lbw(nbw).eq. 1)) then
cut_bw=.true.
c write(*,*) 'cut_bw: ',nbw,xmass,onshell,lbw(nbw),cut_bw
return
endif
endif
c write(*,*) 'final cut_bw: ',nbw,lbw(nbw),xmass,onshell,OnBW(i),cut_bw
enddo
end
subroutine set_peaks
c*****************************************************************************
c Attempts to determine peaks for this configuration
c*****************************************************************************
implicit none
c
c Constants
c
include 'genps.inc'
include 'maxconfigs.inc'
include 'nexternal.inc'
include 'maxamps.inc'
double precision zero
parameter (zero = 0d0)
c
c Arguments
c
c
c Local
c
double precision xm(-nexternal:nexternal)
double precision xe(-nexternal:nexternal)
double precision tsgn, xo, a
double precision x1,x2,xk(nexternal)
double precision dr,mtot,etot,xqfact
double precision spmass
integer i, iconfig, l1, l2, j, nt, nbw, iproc
integer iden_part(-nexternal+1:nexternal)
double precision prmass(-nexternal:0,lmaxconfigs)
double precision prwidth(-nexternal:0,lmaxconfigs)
integer pow(-nexternal:0,lmaxconfigs)
integer idup(nexternal,maxproc,maxsproc)
integer mothup(2,nexternal)
integer icolup(2,nexternal,maxflow,maxsproc)
include 'leshouche.inc'
integer gForceBW(-max_branch:-1,lmaxconfigs) ! Forced BW
include 'decayBW.inc'
c
c Global
c
integer iforest(2,-max_branch:-1,lmaxconfigs)
common/to_forest/ iforest
integer sprop(maxsproc,-max_branch:-1,lmaxconfigs)
integer tprid(-max_branch:-1,lmaxconfigs)
common/to_sprop/sprop,tprid
integer mapconfig(0:lmaxconfigs), this_config
common/to_mconfigs/mapconfig, this_config
real*8 emass(nexternal)
common/to_mass/emass
include 'run.inc'
double precision etmin(nincoming+1:nexternal),etamax(nincoming+1:nexternal)
double precision emin(nincoming+1:nexternal)
double precision r2min(nincoming+1:nexternal,nincoming+1:nexternal)
double precision s_min(nexternal,nexternal)
common/to_cuts/ etmin, emin, etamax, r2min, s_min
double precision xqcutij(nexternal,nexternal),xqcuti(nexternal)
common/to_xqcuts/xqcutij,xqcuti
double precision spole(maxinvar),swidth(maxinvar),bwjac
common/to_brietwigner/spole ,swidth ,bwjac
integer lbw(0:nexternal) !Use of B.W.
common /to_BW/ lbw
double precision stot,m1,m2
common/to_stot/stot,m1,m2
include 'coupl.inc'
include 'cuts.inc'
c
c External
c
c-----
c Begin Code
c-----
include 'props.inc'
c etmin = 10
nt = 0
iconfig = this_config
mtot = 0d0
etot = 0d0 !Total energy needed
spmass = 0d0 !Keep track of BW masses for shat
xqfact=1d0
if(ickkw.eq.2.or.ktscheme.eq.2) xqfact=0.3d0
do i=nincoming+1,nexternal !assumes 2 incoming
xm(i)=emass(i)
c-fax
xe(i)=max(emass(i),max(etmin(i),0d0))
xe(i)=max(xe(i),max(emin(i),0d0))
c-JA 1/2009: Set grid also based on xqcut
xe(i)=max(xe(i),xqfact*xqcuti(i))
xk(i)= 0d0
etot = etot+xe(i)
mtot=mtot+xm(i)
enddo
spmass=mtot
tsgn = +1d0
c Reset variables
nbw = 0
do i=1,nexternal-2
spole(i)=0
swidth(i)=0
enddo
c Find non-zero process number
do iproc=1,maxsproc
if(sprop(iproc,-1,iconfig).ne.0) goto 10
enddo
10 continue
c If no non-zero sprop, set iproc to 1
if(iproc.ge.maxsproc.and.sprop(maxsproc,-1,iconfig).eq.0)
$ iproc=1
c Look for identical particles to map radiation processes
call idenparts(iden_part, iforest(1,-max_branch,iconfig),
$ sprop(1,-max_branch,iconfig), gForceBW(-max_branch,iconfig),
$ prwidth(-nexternal,iconfig))
c Start loop over propagators
do i=-1,-(nexternal-3),-1
if (iforest(1,i,iconfig) .eq. 1) tsgn=-1d0
if (tsgn .eq. 1d0) then !s channel
xm(i) = xm(iforest(1,i,iconfig))+xm(iforest(2,i,iconfig))
xe(i) = xe(iforest(1,i,iconfig))+xe(iforest(2,i,iconfig))
mtot = mtot - xm(i)
etot = etot - xe(i)
if (iforest(1,i,iconfig) .gt. 0
& .and. iforest(2,i,iconfig) .gt. 0) then
c-JA 1/2009: Set deltaR cuts here together with s_min cuts
l1 = iforest(1,i,iconfig)
l2 = iforest(2,i,iconfig)
xm(i)=max(xm(i),sqrt(max(s_min(l1,l2),0d0)))
dr = max(r2min(l1,l2)*dabs(r2min(l1,l2)),0d0)*0.8d0
xm(i)=max(xm(i),
& sqrt(max(etmin(l2),0d0)*max(etmin(l1),0d0)*dr))
c-JA 1/2009: Set grid also based on xqcut
xm(i)=max(xm(i),max(xqcutij(l1,l2),0d0))
endif
c write(*,*) 'iconfig,i',iconfig,i
c write(*,*) prwidth(i,iconfig),prmass(i,iconfig)
if (prwidth(i,iconfig) .gt. 0 ) then
nbw=nbw+1
c JA 6/8/2011 Set xe(i) for resonances
if (lbw(nbw).eq.1) then
xm(i) = max(xm(i), prmass(i,iconfig)-5d0*prwidth(i,iconfig))
else if (gforcebw(i,iconfig).eq.1) then
xm(i) = max(xm(i), prmass(i,iconfig)-bwcutoff*prwidth(i,iconfig))
endif
endif
xe(i)=max(xe(i),xm(i))
c Check for impossible onshell configurations
c Either: required onshell and daughter masses too large
c Or: forced and daughter masses too large
c Or: required offshell and forced, with bwcutoff.le.5
if(prwidth(i,iconfig) .gt. 0.and.
$ (lbw(nbw).eq.1.and.
$ (prmass(i,iconfig)+5d0*prwidth(i,iconfig).lt.xm(i)
$ .or.prmass(i,iconfig)-5d0*prwidth(i,iconfig).gt.stot)
$ .or.gforcebw(i,iconfig).eq.1.and.
$ prmass(i,iconfig)+bwcutoff*prwidth(i,iconfig).lt.xm(i)
$ .or.lbw(nbw).eq.2.and.gforcebw(i,iconfig).eq.1 .and.
$ bwcutoff.le.5d0))
$ then
c Write results.dat and quit
call write_null_results()
stop
endif
if (prwidth(i,iconfig) .gt. 0 .and. lbw(nbw) .le. 1) then !B.W.
if (i .eq. -(nexternal-(nincoming+1))) then !This is s-hat
j = 3*(nexternal-2)-4+1 !set i to ndim+1
c-----
c tjs 11/2008 if require BW then force even if worried about energy
c JA 8/2011 don't use BW if mass is > CM energy
c----
if(prmass(i,iconfig).ge.xm(i).and.iden_part(i).eq.0.and.
$ prmass(i,iconfig).lt.sqrt(stot)
$ .or. lbw(nbw).eq.1) then
write(*,*) 'Setting PDF BW',j,nbw,prmass(i,iconfig)
spole(j)=prmass(i,iconfig)*prmass(i,iconfig)/stot
swidth(j) = prwidth(i,iconfig)*prmass(i,iconfig)/stot
endif
else if((prmass(i,iconfig)+5d0*prwidth(i,iconfig)).ge.xm(i)
$ .and. iden_part(i).eq.0 .or. lbw(nbw).eq.1) then
c JA 02/13 Only allow BW if xm below M+5*Gamma
write(*,*) 'Setting BW',i,nbw,prmass(i,iconfig)
spole(-i)=prmass(i,iconfig)*prmass(i,iconfig)/stot
swidth(-i) = prwidth(i,iconfig)*prmass(i,iconfig)/stot
endif
c JA 4/1/2011 Set grid in case there is no BW (radiation process)
if (swidth(-i) .eq. 0d0 .and.
$ i.ne.-(nexternal-(nincoming+1)))then
a=prmass(i,iconfig)**2/stot
xo = min(xm(i)**2/stot, 1-1d-8)
if (xo.eq.0d0) xo=1d0/stot
call setgrid(-i,xo,a,1)
endif
c Set spmass for BWs
if (swidth(-i) .ne. 0d0)
$ spmass=spmass-xm(i) +
$ max(xm(i),prmass(i,iconfig)-5d0*prwidth(i,iconfig))
else !1/x^pow
a=prmass(i,iconfig)**2/stot
c JA 4/1/2011 always set grid
xo = min(xm(i)**2/stot, 1-1d-8)
if (xo.eq.0d0) xo=1d0/stot
c if (prwidth(i, iconfig) .eq. 0d0.or.iden_part(i).gt.0) then
call setgrid(-i,xo,a,1)
c else
c write(*,*) 'Using flat grid for BW',i,nbw,
c $ prmass(i,iconfig)
c endif
endif
etot = etot+xe(i)
mtot=mtot+xm(i)
c write(*,*) 'New mtot',i,mtot,xm(i)
else !t channel
c
c Check closest to p1
c
nt = nt+1
l2 = iforest(2,i,iconfig) !need dr cut
x1 = 0
c-fax
c-JA 1/2009: Set grid also based on xqcut
if (l2 .gt. 0) x1 = max(etmin(l2),max(xqfact*xqcuti(l2),0d0))
x1 = max(x1, xe(l2)/1d0)
if (nt .gt. 1) x1 = max(x1,xk(nt-1))
xk(nt)=x1
c write(*,*) 'Using 1',l2,x1
c
c Check closest to p2
c
j = i-1
l2 = iforest(2,j,iconfig)
x2 = 0
c-JA 1/2009: Set grid also based on xqcut
if (l2 .gt. 0) x2 = max(etmin(l2),max(xqfact*xqcuti(l2),0d0))
c if (l2 .gt. 0) x2 = max(etmin(l2),0d0)
x2 = max(x2, xe(l2)/1d0)
c if (nt .gt. 1) x2 = max(x2,xk(nt-1))
c write(*,*) 'Using 2',l2,x2
xo = min(x1,x2)
c Use 1/10000 of sqrt(s) as minimum, to always get integration
xo = xo*xo/stot
if (xo.eq.0d0)then
xo=1d0/stot
write(*,*) 'Warning: No cutoff for shat integral found'
write(*,*) ' Minimum set to ', xo
endif
a=-prmass(i,iconfig)**2/stot
c call setgrid(-i,xo,a,pow(i,iconfig))
c write(*,*) 'Enter minimum for ',-i, xo
c read(*,*) xo
if (i .ne. -1 .or. .true.) call setgrid(-i,xo,a,1)
endif
enddo
c Perform setting for shat (PDF BW or 1/s)
if (abs(lpp(1)) .eq. 1 .or. abs(lpp(2)) .eq. 1) then
c Set minimum based on: 1) required energy 2) resonances 3) 1/10000 of sqrt(s)
i = 3*(nexternal-2) - 4 + 1
xo = max(min(etot**2/stot, 1d0-1d-8),1d0/stot)
c Take into account special cuts
xo = max(xo, xptj*dabs(xptj)/stot)
xo = max(xo, xptb*dabs(xptb)/stot)
xo = max(xo, xpta*dabs(xpta)/stot)
xo = max(xo, xptl*dabs(xptl)/stot)
xo = max(xo, xmtc*dabs(xmtc)/stot)
xo = max(xo, htjmin**2/stot)
xo = max(xo, ptj1min**2/stot)
xo = max(xo, (2*ptj2min)**2/stot)
xo = max(xo, (3*ptj3min)**2/stot)
xo = max(xo, (4*ptj4min)**2/stot)
xo = max(xo, ht2min**2/stot)
xo = max(xo, ht3min**2/stot)
xo = max(xo, ht4min**2/stot)
xo = max(xo, misset**2/stot)
xo = max(xo, ptllmin**2/stot)
xo = max(xo, ptl1min**2/stot)
xo = max(xo, (2*ptl2min)**2/stot)
xo = max(xo, (3*ptl3min)**2/stot)
xo = max(xo, (4*ptl4min)**2/stot)
xo = max(xo, mmnl**2/stot)
c Include mass scale from BWs
xo = max(xo, spmass**2/stot)
if (swidth(i).eq.0.and.xo.eq.1d0/stot) then
write(*,*) 'Warning: No minimum found for integration'
write(*,*) ' Setting minimum to ',1d0/stot
endif
c-----------------------
c tjs 4/29/2008 use analytic transform for s-hat
c-----------------------
if (swidth(i) .eq. 0d0) then
swidth(i) = xo
spole(i)= -2.0d0 ! 1/s pole
write(*,*) "Transforming s_hat 1/s ",i,xo
else
write(*,*) "Transforming s_hat BW ",spole(i),swidth(i)
endif
endif
i=-8
c write(*,*) 'Enter minimum for ',-i, xo
c read(*,*) xo
c if (xo .gt. 0) call setgrid(-i,xo,a,1)
i=-10
c write(*,*) 'Enter minimum for ',-i, xo
c read(*,*) xo
c if (xo .gt. 0) call setgrid(-i,xo,a,1)
end
subroutine write_null_results()
implicit none
write(*,*),'Impossible BW configuration'
open(unit=66,file='results.dat',status='unknown')
write(66,'(3e12.5,2i9,i5,i9,3e10.3)')0.,0.,0.,0,0,1,0,0.,0.,0.
write(66,'(i4,5e15.5)') 1,0.,0.,0.,0.,0.
close(66)
end
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