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Commit | Line | Data |
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99e5fe42 | 1 | c |
2 | c => Original copy from /star/emc/shester/cl/pams/emc/jet/jet_finer_ua1.F | |
3 | c | |
4 | c:>------------------------------------------------------------------ | |
5 | C:ROUTINE: subroutine jet_finder_ua1 | |
6 | C:DESCRIPTION: UA1 jet algorithm from LUND JETSET | |
7 | C:RETURN VALUE: ierror=1 on error | |
8 | c:>------------------------------------------------------------------ | |
9 | subroutine ua1_jet_finder( | |
10 | + ncell, ncell_tot, etc, etac, phic, | |
11 | + min_move, max_move, mode, prec_bg, ierror) | |
12 | implicit none ! 5-oct-2001 | |
13 | ||
14 | real C_PI | |
15 | real C_2PI | |
16 | real etaCellSize | |
17 | real phiCellSize | |
18 | real arg | |
19 | INTEGER NMAX,JMAX | |
20 | parameter(NMAX=60000,JMAX=100) ! 10-oct-2201 | |
21 | integer ncell, ierror, mode, ncell_tot | |
22 | real etc(NMAX),etac(NMAX),phic(NMAX) | |
23 | real cone_rad, et_seed, ej_min, et_min | |
24 | real min_move, max_move, prec_bg | |
25 | integer flag(NMAX),index(NMAX) | |
26 | integer n_iter,i,j,k,l,nc | |
27 | real et_sum,et_ave,et_sum_old | |
28 | real et,eta,phi,eta0,phi0,etab,phib,ets,etas,phis | |
29 | real deta,dphi,r_int | |
30 | ! | |
31 | real occupationAll, occupationInJet ! 3-oct-2001 by PAI | |
32 | integer maxTowerInJet ! 5-oct-2001 by PAI | |
33 | save maxTowerInJet ! This is obligatory | |
34 | integer idPerfomance | |
35 | data idPerfomance /119/ | |
36 | save idPerfomance | |
37 | ! print parameter - 27-sep-2001 by PAI | |
38 | integer kpri | |
39 | data kpri /0/ | |
40 | integer njet, ncellj | |
83a444b1 | 41 | real etj, etaj, phij, etavg |
99e5fe42 | 42 | * Results |
43 | COMMON /UA1JETS/ NJET, ETJ(100), ETAJ(100,2), PHIJ(100,2), | |
83a444b1 | 44 | + NCELLJ(100), ETAVG |
99e5fe42 | 45 | * Cell Geometry |
46 | COMMON /UA1CELL/ etaCellSize, phiCellSize | |
47 | * Parameters | |
48 | COMMON /UA1PARA/ cone_rad, et_seed, ej_min, et_min | |
49 | ||
50 | C_PI = 3.1415926 | |
51 | C_2PI = 2.*C_PI | |
52 | ||
53 | if(kpri.eq.0) then | |
54 | kpri = 1 | |
55 | ! for add. correction of jet energy if ocupation in jet not 100% !! | |
56 | ! may differ from real number because grid | |
57 | maxTowerInJet= | |
58 | + int((C_PI*cone_rad*cone_rad)/(etaCellSize*phiCellSize)+0.5) | |
59 | print 1, ncell_tot | |
60 | + ,cone_rad, et_seed, ej_min, et_min | |
61 | + ,min_move, max_move, mode, prec_bg | |
62 | + ,maxTowerInJet | |
63 | 1 format(/ | |
64 | + ' == jet_finder_UA1 == '/ | |
65 | + ' ncell_tot ', i5/ | |
66 | + ' cone rad ', f5.2/ | |
67 | + ' et_seed ', f5.2,' GeV/C'/ | |
68 | + ' ej_min ', f5.2,' GeV/C'/ | |
69 | + ' et_min(tower after bg sub.) ', f5.2,' GeV/C'/ | |
70 | + ' min_cone_move ', f5.3/ | |
71 | + ' max_cone_move ', f5.3/ | |
72 | + ' Mode for BG subtraction ', i5/ | |
73 | + ' prec_bg ', f5.4/ | |
74 | + ' -- PAI"s addition --'/ | |
75 | + ' maxTowerInJet ', i5/ | |
76 | + ' -- '/ | |
77 | + ) | |
78 | if(NMAX .lt. ncell_tot) then | |
79 | print 2, NMAX, ncell_tot | |
80 | 2 format('<E> you must increase memory -> NMAX ',i6 | |
81 | + ,' ncell_tot ', i6) | |
82 | endif | |
83 | endif | |
99e5fe42 | 84 | occupationAll = float(ncell) / float(ncell_tot) |
99e5fe42 | 85 | ! print parameter - 27-sep-2001 by PAI |
86 | ierror =0 | |
87 | n_iter =0 | |
88 | c*-sort cells by Et decending order, store the order in index | |
89 | call sortzv(etc,index,ncell,-1,1,0) | |
90 | c*-sum up total energy of all cells | |
91 | if(mode .eq. 1) then | |
92 | n_iter=1 | |
93 | et_sum=0.0 | |
94 | do i=1, ncell | |
95 | et_sum=et_sum+etc(i) | |
96 | enddo | |
97 | et_sum_old=et_sum | |
98 | et_ave=et_sum/float(ncell_tot) | |
99 | else | |
100 | et_ave=0.0 | |
101 | endif | |
102 | print *,'Iter ', n_iter, ' et_ave ', et_ave, ' #cells ', ncell | |
103 | c*-Watch out!!! For mode=1, it can jump back to here for next iteration!!! | |
104 | 999 continue | |
105 | c*-kill cells (flag=2) with Et below ET_MIN after background subtraction | |
106 | cfca call vzero(flag,ncell) | |
107 | do i=1, ncell | |
108 | flag(i)=0 | |
109 | if(etc(i)-et_ave .le. et_min) flag(i)=2 | |
110 | enddo | |
111 | njet = 0 | |
112 | c*-Initiator cell is the one with highest Et of not yet used ones | |
113 | i=1 | |
114 | j=index(i) | |
115 | if(i.eq.1. and. etc(j).lt.et_seed) then | |
116 | if(mode.eq.0 .or. (mode.eq.1 .and. n_iter.eq.1)) then | |
99e5fe42 | 117 | print *,' no cell with Et higher than et_seed ->', etc(j) |
118 | return | |
119 | endif | |
120 | endif | |
121 | do while(etc(j) .ge. et_seed) | |
122 | if(flag(j) .eq. 0) then | |
123 | C write(6,*) j, etc(j), et_seed, etac(j), phic(j), flag(j) | |
124 | ||
125 | et =etc(j)-et_ave | |
126 | eta=etac(j) | |
127 | phi=phic(j) | |
128 | eta0=eta | |
129 | phi0=phi | |
130 | etab=eta | |
131 | phib=phi | |
132 | ets =0.0 | |
133 | etas=0.0 | |
134 | phis=0.0 | |
135 | c*-weighted eta and phi. | |
136 | do k = 1, ncell | |
137 | l = index(k) | |
138 | if(flag(l).eq.0) then | |
139 | deta = etac(l)-eta | |
140 | c*-Is the cell is in the cone? | |
141 | if(abs(deta).le.cone_rad)then | |
142 | dphi=phic(l)-phi | |
143 | do while(dphi .gt. C_PI) | |
144 | dphi=dphi-C_2PI | |
145 | enddo | |
146 | do while(dphi .le. -C_PI) | |
147 | dphi=dphi+C_2PI | |
148 | enddo | |
149 | if(abs(dphi).le.cone_rad) then | |
150 | r_int=sqrt(deta**2+dphi**2) | |
151 | if(r_int.le.cone_rad)then | |
152 | c*-calculate offset from initiate cell | |
153 | deta=etac(l)-eta0 | |
154 | dphi=phic(l)-phi0 | |
155 | do while(dphi .gt. C_PI) | |
156 | dphi=dphi-C_2PI | |
157 | enddo | |
158 | do while(dphi .lt. -C_PI) | |
159 | dphi=dphi+C_2PI | |
160 | enddo | |
161 | et=etc(l)-et_ave | |
162 | etas=etas+abs(et)*deta | |
163 | phis=phis+abs(et)*dphi | |
164 | ets =ets +et | |
165 | c*-New weighted eta and phi including this cell | |
166 | eta=eta0+etas/ets | |
167 | phi=phi0+phis/ets | |
168 | c*-If cone does not move much from previous cone, just go next step | |
169 | r_int=sqrt((eta-etab)**2+(phi-phib)**2) | |
170 | if(r_int .le. min_move) then | |
171 | goto 159 | |
172 | endif | |
173 | c*-Cone should not move more than MAX_CONE_MOVE from initiator cell | |
174 | r_int=sqrt((etas/ets)**2+(phis/ets)**2) | |
175 | if(r_int .ge. max_move) then | |
176 | eta=etab | |
177 | phi=phib | |
178 | goto 159 | |
179 | endif | |
180 | c*-Store this loop information | |
181 | etab=eta | |
182 | phib=phi | |
183 | endif | |
184 | endif | |
185 | endif | |
186 | endif | |
187 | enddo | |
188 | 159 continue | |
189 | ||
190 | c*-sum up unused cells within required distance of given eta/phi | |
191 | nc=0 | |
192 | ets=0.0 | |
193 | etas=0.0 | |
194 | phis=0.0 | |
195 | do k=1,ncell | |
196 | l=index(k) | |
197 | if(flag(l) .eq. 0) then | |
198 | deta=etac(l)-eta | |
199 | if(abs(deta).le.cone_rad)then | |
200 | dphi=phic(l)-phi | |
201 | do while(dphi .gt. C_PI) | |
202 | dphi=dphi-C_2PI | |
203 | enddo | |
204 | do while(dphi .le. -C_PI) | |
205 | dphi=dphi+C_2PI | |
206 | enddo | |
207 | if(abs(dphi).le.cone_rad) then | |
208 | r_int=sqrt(deta**2+dphi**2) | |
209 | if(r_int.le.cone_rad)then | |
210 | flag(l)=-1 | |
211 | et =etc(l)-et_ave | |
212 | ets =ets +et | |
213 | etas=etas+et*deta | |
214 | phis=phis+et*dphi | |
215 | nc = nc + 1 | |
216 | endif | |
217 | endif | |
218 | endif | |
219 | endif | |
220 | enddo ! do k=1,ncell | |
221 | ! 5-oct-2001 by PAI - remove 20-feb-2002 by PAI | |
222 | ! 20-feb-2002 - it is work if you apply cut on eT before jet finder !!! | |
223 | ! if(maxTowerInJet .gt. nc) then | |
224 | ! ets = ets - et_ave*(maxTowerInJet - nc) | |
225 | ! endif | |
226 | ! 5-oct-2001 by PAI | |
227 | ||
228 | c*-reject cluster below minimum Ej_min | |
229 | c* protection (am) | |
83a444b1 | 230 | |
231 | c arg = 0. | |
232 | c if (ets .ne. 0.) then | |
233 | c if (abs(etas/ets) .lt. 23.719) then | |
234 | c arg = ets * cosh(etas/ets) | |
235 | c else | |
236 | c arg = 1.e10 | |
237 | c endif | |
238 | c endif | |
99e5fe42 | 239 | |
83a444b1 | 240 | if(ets .lt. ej_min) then |
99e5fe42 | 241 | do k=1,ncell |
242 | if(flag(k).le.0) flag(k)=0 | |
243 | enddo | |
99e5fe42 | 244 | else |
245 | c*-eles, store flags and jet variables | |
246 | do k=1,ncell | |
247 | if(flag(k).eq.-1) flag(k)=1 | |
248 | enddo | |
83a444b1 | 249 | etas=eta+etas/ets |
99e5fe42 | 250 | phi=phi+phis/ets |
251 | do while(phi .ge. C_2PI) | |
252 | phi=phi-C_2PI | |
253 | enddo | |
254 | do while(phi .lt. 0.0) | |
255 | phi=phi+C_2PI | |
256 | enddo | |
257 | njet=njet+1 | |
258 | etj(njet) =ets | |
259 | etaj(njet,1)=eta0 | |
260 | phij(njet,1)=phi0 | |
261 | etaj(njet,2)=etas | |
262 | phij(njet,2)=phi | |
263 | ncellj(njet)=nc | |
83a444b1 | 264 | etavg = et_ave |
99e5fe42 | 265 | endif |
266 | endif | |
267 | i=i+1 | |
268 | j=index(i) | |
269 | enddo | |
270 | ||
271 | c*-recalculate energy sum excluding used cells. | |
272 | if(mode.eq.1)then | |
273 | et_sum=0.0 | |
274 | nc=0 ! #cells in jets | |
275 | do i=1,ncell | |
276 | if(flag(i).ne.1) then ! 1 if cell in jet | |
277 | et_sum=et_sum+etc(i) | |
278 | else | |
279 | nc=nc+1 | |
280 | endif | |
281 | enddo | |
282 | c*-if background level changes more than prec_bg, go next iteration!!! | |
283 | c*-after 10 iteration, stop working and finish | |
284 | if( (et_sum .gt. 0.) | |
285 | + .and. (abs(et_sum-et_sum_old)/et_sum.gt.prec_bg | |
286 | + .and. n_iter.le.10) | |
287 | + .or. n_iter.eq.1) then ! minimum 2 iteration - 10-oct-2001 by pai | |
288 | et_ave=et_sum/float(ncell_tot-nc) | |
289 | n_iter=n_iter+1 | |
290 | et_sum_old = et_sum | |
291 | print *,'End of iteration : et_ave ', et_ave, ' nc ', nc | |
292 | + , ' Jet energy ', ets | |
293 | goto 999 | |
294 | c*-Watch out!!! Here is a big jump!!! | |
295 | endif | |
296 | occupationInJet = float(ncell) / float(ncell_tot) | |
99e5fe42 | 297 | write(*,*) njet,' jet found in ',n_iter, |
298 | + ' iteration(s) : EtSum, EtAve =', | |
299 | + et_sum,et_sum/float(ncell_tot-nc) | |
300 | + , ' ncell_tot ', ncell_tot, ' #cell in jet ', nc | |
301 | + , ' occupationAll ', occupationAll | |
302 | + , ' occupationInJet ', occupationInJet | |
303 | endif | |
304 | ||
305 | if(njet.gt.100)then | |
306 | write(*,*)'UA1:Problem:More than 100 jets found!' | |
307 | ierror = 1 | |
308 | elseif(njet.eq.0)then | |
309 | write(*,*)'UA1:Done:No jet found!' | |
310 | else | |
311 | write(*,*) | |
312 | +'UA1:Done:Found ',njet,' jet(s)' | |
313 | end if | |
314 | return | |
315 | end | |
316 | ||
317 | ||
318 |