1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
|
subroutine set_invarients(nfinal,ninvar)
c***************************************************************************
c Calculates all of the invarients for a 2->n process
c***************************************************************************
implicit none
c
c Constants
c
include 'genps.inc'
c
c Arguments
c
integer nfinal,ninvar
c
c Local
c
integer ip1,ip2,ipstart,ipstop,np,i
integer ncycle
character*10 buff
c
c Global
c
integer imom(maxinvar),ninvarients
common/to_invarients/imom ,ninvarients
c-----
c Begin Code
c-----
do i=1,nfinal
imom(i)=i
enddo
ipstart=1
ipstop =nfinal
np =nfinal
c
c First do all the s-channel
c
do ncycle=2,nfinal-1
do ip1 = ipstart,ipstop-1
do ip2=int((real(imom(ip1))/10.-imom(ip1)/10)*10+.1)+1,
$ nfinal
np=np+1
if (np .gt. maxinvar) then
print*,'Sorry too many invarients',np,ip1,ip2,ncycle
stop
endif
imom(np)=imom(ip1)*10+imom(ip2)
if (imom(np) .lt. 10) then
write(buff,'(a2,i1)') 'S?',imom(np)
elseif (imom(np) .lt. 100) then
write(buff,'(a2,i2)') 'S?',imom(np)
elseif (imom(np) .lt. 1000) then
write(buff,'(a2,i3)') 'S?',imom(np)
elseif (imom(np) .lt. 10000) then
write(buff,'(a2,i4)') 'S?',imom(np)
elseif (imom(np) .lt. 100000) then
write(buff,'(a2,i5)') 'S?',imom(np)
else
write(buff,'(a2,i6)') 'S?',imom(ip1)
endif
c call hbook1(100+np-nfinal,buff,100,0.,1.,0.)
c write(*,'(i4,i6)') np-nfinal,imom(np)
write(*,'(i4,a1,a6)') np-nfinal,'=',buff
if ((np-nfinal)/7 .eq. real(np-nfinal)/7.) write(*,*)' '
enddo
enddo
ipstart=ipstop+1
ipstop = np
enddo
c
c Now do the t-channel
c
ipstop = np
do ip1 = 1,ipstop
c write(*,'(i4,a2,i6)') np-nfinal+ip1,'a-',imom(ip1)
if (imom(ip1) .lt. 10) then
write(buff,'(a2,i1)') 'T?',imom(ip1)
elseif (imom(ip1) .lt. 100) then
write(buff,'(a2,i2)') 'T?',imom(ip1)
elseif (imom(ip1) .lt. 1000) then
write(buff,'(a2,i3)') 'T?',imom(ip1)
elseif (imom(ip1) .lt. 10000) then
write(buff,'(a2,i4)') 'T?',imom(ip1)
elseif (imom(ip1) .lt. 100000) then
write(buff,'(a2,i5)') 'T?',imom(ip1)
else
write(buff,'(a2,i6)') 'T?',imom(ip1)
endif
c call hbook1(100+np-nfinal+ip1,buff,100,0.,1.,0.)
c write(*,*) np-nfinal+ip1,buff
write(*,'(i4,a1,a6)') np-nfinal+ip1,'=',buff
if ((np-nfinal+ip1)/7 .eq. real(np-nfinal+ip1)/7.) write(*,*)
enddo
write(*,*)
print*,'Particles, Invarients',nfinal,np-nfinal+np
ninvarients=np-nfinal+np
ninvar=ninvarients
if (ninvarients .gt. maxinvar) then
print*,'Error too many invarients to map'
c stop
endif
end
subroutine fill_invarients(nfinal,p1,s,xx)
c***************************************************************************
c Calculates all of the invarients for a 2->n process
c***************************************************************************
implicit none
c
c Constants
c
include 'genps.inc'
c
c Arguments
c
integer nfinal
double precision p1(0:3,nfinal+2),s,xx(55)
c
c Local
c
integer ip1,ip2,ipstart,ipstop,np,i,j
integer imom(maxinvar)
integer ncycle
character*10 buff
double precision p(0:3,maxinvar),ptemp(0:3)
c
c External
c
double precision dot
external dot
c-----
c Begin Code
c-----
do i=1,nfinal
imom(i) = i
do j=0,3
p(j,i)=p1(j,i+2)
enddo
c write(*,'(i3,4f17.8)') i,(p(j,i),j=0,3)
enddo
ipstart=1
ipstop =nfinal
np =nfinal
c
c First do all the s-channel
c
do ncycle=2,nfinal-1
do ip1 = ipstart,ipstop-1
do ip2=int((real(imom(ip1))/10.-imom(ip1)/10)*10+.1)+1
$ ,nfinal
np=np+1
if (np .gt. maxinvar) then
print*,'Sorry too many invarients',np,ip1,ip2,ncycle
stop
endif
imom(np)=imom(ip1)*10+imom(ip2)
do j=0,3
p(j,np) = p(j,ip1)+p(j,ip2)
enddo
xx(np-nfinal) = dot(p(0,np),p(0,np))/s
c call hfill(100+np-nfinal,
c & real(dot(p(0,np),p(0,np))/s),0.,wgt)
c write(*,'(i4,3f20.8)') np-nfinal,
c & real(dot(p(0,np),p(0,np))/s)
enddo
enddo
ipstart=ipstop+1
ipstop = np
enddo
c
c Now do the t-channel
c
ipstop = np
do ip1 = 1,ipstop
do j = 0,3
ptemp(j)=p1(j,1)-p(j,ip1)
enddo
xx(np-nfinal+ip1)= .5d0*(dot(ptemp,ptemp)/s+1d0)
c call hfill(100+np-nfinal+ip1,real(-dot(ptemp,ptemp)/s),0.,wgt)
c write(*,'(i4,3f20.8)') np-nfinal+ip1,
c & real(-dot(ptemp,ptemp)/s)
enddo
end
subroutine map_invarients(Minvar,nconfigs,ninvar,mincfig,maxcfig,nexternal,nincoming)
c****************************************************************************
c Determines mappings for each structure of invarients onto integration
c variables. Input: Ninvar, iforest. Output: Minvar, ninvar
c****************************************************************************
implicit none
c
c Constants
c
include 'genps.inc'
include 'maxconfigs.inc'
c
c Arguments
c
integer Minvar(maxdim,lmaxconfigs),nconfigs,ninvar,nexternal,nincoming
integer mincfig,maxcfig
c
c Local
c
integer iconfig, jgrid,j, nbranch
logical found,tchannel
c
c Global
c
integer imom(maxinvar),ninvarients
common/to_invarients/imom ,ninvarients
integer iforest(2,-max_branch:-1,lmaxconfigs)
common/to_forest/ iforest
c-----
c Begin Code
c----
nbranch = nexternal-2
jgrid=0
c
c
c Try simple mapping if nconfigs = 1
c
if (nconfigs .eq. 1) then
c do j=1,3*nbranch-4+2
do j=1,maxdim
minvar(j,mincfig)=j
enddo
jgrid=j-1
else
c if (ep) jgrid=1
c if (pp) jgrid=2
do iconfig=mincfig,maxcfig
tchannel = .false.
do j=1,nbranch-1
if (iforest(1,-j,iconfig) .eq. 1) then
tchannel=.true.
endif
jgrid=jgrid+1
minvar(j,iconfig) = jgrid
if (tchannel .and. j .lt. nbranch-1) then
jgrid=jgrid+1
minvar(nbranch-1+2*j,iconfig)=jgrid
endif
enddo !Each Branch
if (.not. tchannel .and. nincoming.eq.2) then !Don't need last s-channel
jgrid=jgrid-1
minvar(nbranch-1,iconfig)=0
endif
c if (pp) then
c jgrid=jgrid+1
c minvar(3*nbranch-3,iconfig)=jgrid
c jgrid=jgrid+1
c minvar(3*nbranch-2,iconfig)=jgrid
c elseif (ep) then
c jgrid=jgrid+1
c minvar(3*nbranch-3,iconfig)=jgrid
c endif
enddo !Each configurations
endif
ninvar = jgrid
end
subroutine sortint(n,ra)
integer ra(n)
l=n/2+1
ir=n
10 continue
if(l.gt.1)then
l=l-1
rra=ra(l)
else
rra=ra(ir)
ra(ir)=ra(1)
ir=ir-1
if(ir.eq.1)then
ra(1)=rra
return
endif
endif
i=l
j=l+l
20 if(j.le.ir)then
if(j.lt.ir)then
if(ra(j).lt.ra(j+1))j=j+1
endif
if(rra.lt.ra(j))then
ra(i)=ra(j)
i=j
j=j+j
else
j=ir+1
endif
go to 20
endif
ra(i)=rra
go to 10
end
|