C********************************************************************* C...PYMAXI C...Finds optimal set of coefficients for kinematical variable selection C...and the maximum of the part of the differential cross-section used C...in the event weighting. SUBROUTINE PYMAXI C...Double precision and integer declarations. IMPLICIT DOUBLE PRECISION(A-H, O-Z) IMPLICIT INTEGER(I-N) INTEGER PYK,PYCHGE,PYCOMP C...Parameter statement to help give large particle numbers. PARAMETER (KSUSY1=1000000,KSUSY2=2000000,KEXCIT=4000000) C...Commonblocks. COMMON/PYDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200) COMMON/PYDAT2/KCHG(500,4),PMAS(500,4),PARF(2000),VCKM(4,4) COMMON/PYDAT3/MDCY(500,3),MDME(4000,2),BRAT(4000),KFDP(4000,5) COMMON/PYSUBS/MSEL,MSELPD,MSUB(500),KFIN(2,-40:40),CKIN(200) COMMON/PYPARS/MSTP(200),PARP(200),MSTI(200),PARI(200) COMMON/PYINT1/MINT(400),VINT(400) COMMON/PYINT2/ISET(500),KFPR(500,2),COEF(500,20),ICOL(40,4,2) COMMON/PYINT3/XSFX(2,-40:40),ISIG(1000,3),SIGH(1000) COMMON/PYINT4/MWID(500),WIDS(500,5) COMMON/PYINT5/NGENPD,NGEN(0:500,3),XSEC(0:500,3) COMMON/PYINT6/PROC(0:500) CHARACTER PROC*28 COMMON/PYINT7/SIGT(0:6,0:6,0:5) SAVE /PYDAT1/,/PYDAT2/,/PYDAT3/,/PYSUBS/,/PYPARS/,/PYINT1/, &/PYINT2/,/PYINT3/,/PYINT4/,/PYINT5/,/PYINT6/,/PYINT7/ C...Local arrays, character variables and data. CHARACTER CVAR(4)*4 DIMENSION NPTS(4),MVARPT(500,4),VINTPT(500,30),SIGSPT(500), &NAREL(7),WTREL(7),WTMAT(7,7),WTRELN(7),COEFU(7),COEFO(7), &IACCMX(4),SIGSMX(4),SIGSSM(3),PMMN(2) DATA CVAR/'tau ','tau''','y* ','cth '/ DATA SIGSSM/3*0D0/ C...Initial values and loop over subprocesses. NPOSI=0 VINT(143)=1D0 VINT(144)=1D0 XSEC(0,1)=0D0 DO 460 ISUB=1,500 MINT(1)=ISUB MINT(51)=0 C...Find maximum weight factors for photon flux. IF(MINT(141).NE.0.OR.MINT(142).NE.0) CALL PYGAGA(2,WTGAGA) C...Select subprocess to study: skip cases not applicable. IF(ISET(ISUB).EQ.11) THEN IF(MSUB(ISUB).NE.1) GOTO 460 XSEC(ISUB,1)=1.00001D0*COEF(ISUB,1) IF(MINT(141).NE.0.OR.MINT(142).NE.0) XSEC(ISUB,1)= & WTGAGA*XSEC(ISUB,1) NPOSI=NPOSI+1 GOTO 450 ELSEIF(ISUB.GE.91.AND.ISUB.LE.95) THEN XSEC(ISUB,1)=SIGT(0,0,ISUB-90) IF(MINT(141).NE.0.OR.MINT(142).NE.0) XSEC(ISUB,1)= & WTGAGA*XSEC(ISUB,1) IF(MSUB(ISUB).NE.1) GOTO 460 NPOSI=NPOSI+1 GOTO 450 ELSEIF(ISUB.EQ.96) THEN IF(MINT(50).EQ.0) GOTO 460 IF(MSUB(95).NE.1.AND.MSTP(81).LE.0.AND.MSTP(131).LE.0) & GOTO 460 IF(MINT(49).EQ.0.AND.MSTP(131).EQ.0) GOTO 460 ELSEIF(ISUB.EQ.11.OR.ISUB.EQ.12.OR.ISUB.EQ.13.OR.ISUB.EQ.28.OR. & ISUB.EQ.53.OR.ISUB.EQ.68) THEN IF(MSUB(ISUB).NE.1.OR.MSUB(95).EQ.1) GOTO 460 ELSE IF(MSUB(ISUB).NE.1) GOTO 460 ENDIF ISTSB=ISET(ISUB) IF(ISUB.EQ.96) ISTSB=2 IF(MSTP(122).GE.2) WRITE(MSTU(11),5000) ISUB MWTXS=0 IF(MSTP(142).GE.1.AND.ISUB.NE.96.AND.MSUB(91)+MSUB(92)+MSUB(93)+ & MSUB(94)+MSUB(95).EQ.0) MWTXS=1 C...Find resonances (explicit or implicit in cross-section). MINT(72)=0 KFR1=0 IF(ISTSB.EQ.1.OR.ISTSB.EQ.3.OR.ISTSB.EQ.5) THEN KFR1=KFPR(ISUB,1) ELSEIF(ISUB.EQ.24.OR.ISUB.EQ.25.OR.ISUB.EQ.110.OR.ISUB.EQ.165 & .OR.ISUB.EQ.171.OR.ISUB.EQ.176) THEN KFR1=23 ELSEIF(ISUB.EQ.23.OR.ISUB.EQ.26.OR.ISUB.EQ.166.OR.ISUB.EQ.172 & .OR.ISUB.EQ.177) THEN KFR1=24 ELSEIF(ISUB.GE.71.AND.ISUB.LE.77) THEN KFR1=25 IF(MSTP(46).EQ.5) THEN KFR1=30 PMAS(30,1)=PARP(45) PMAS(30,2)=PARP(45)**3/(96D0*PARU(1)*PARP(47)**2) ENDIF ELSEIF(ISUB.EQ.194) THEN KFR1=54 ELSEIF(ISUB.EQ.195) THEN KFR1=55 ELSEIF(ISUB.GE.361.AND.ISUB.LE.368) THEN KFR1=54 ELSEIF(ISUB.GE.370.AND.ISUB.LE.377) THEN KFR1=55 ENDIF CKMX=CKIN(2) IF(CKMX.LE.0D0) CKMX=VINT(1) KCR1=PYCOMP(KFR1) IF(KFR1.NE.0) THEN IF(CKIN(1).GT.PMAS(KCR1,1)+20D0*PMAS(KCR1,2).OR. & CKMX.LT.PMAS(KCR1,1)-20D0*PMAS(KCR1,2)) KFR1=0 ENDIF IF(KFR1.NE.0) THEN TAUR1=PMAS(KCR1,1)**2/VINT(2) IF(KFR1.EQ.54) THEN CALL PYTECM(S1,S2) TAUR1=S1/VINT(2) ENDIF GAMR1=PMAS(KCR1,1)*PMAS(KCR1,2)/VINT(2) MINT(72)=1 MINT(73)=KFR1 VINT(73)=TAUR1 VINT(74)=GAMR1 ENDIF KFR2=0 IF(ISUB.EQ.141.OR.ISUB.EQ.194.OR.(ISUB.GE.364.AND.ISUB.LE.368)) $ THEN KFR2=23 IF(ISUB.EQ.194) THEN KFR2=56 ELSEIF(ISUB.GE.364.AND.ISUB.LE.368) THEN KFR2=56 ENDIF KCR2=PYCOMP(KFR2) TAUR2=PMAS(KCR2,1)**2/VINT(2) IF(KFR2.EQ.56) THEN CALL PYTECM(S1,S2) TAUR2=S2/VINT(2) ENDIF GAMR2=PMAS(KCR2,1)*PMAS(KCR2,2)/VINT(2) IF(CKIN(1).GT.PMAS(KCR2,1)+20D0*PMAS(KCR2,2).OR. & CKMX.LT.PMAS(KCR2,1)-20D0*PMAS(KCR2,2)) KFR2=0 IF(KFR2.NE.0.AND.KFR1.NE.0) THEN MINT(72)=2 MINT(74)=KFR2 VINT(75)=TAUR2 VINT(76)=GAMR2 ELSEIF(KFR2.NE.0) THEN KFR1=KFR2 TAUR1=TAUR2 GAMR1=GAMR2 MINT(72)=1 MINT(73)=KFR1 VINT(73)=TAUR1 VINT(74)=GAMR1 KFR2=0 ENDIF ENDIF C...Find product masses and minimum pT of process. SQM3=0D0 SQM4=0D0 MINT(71)=0 VINT(71)=CKIN(3) VINT(80)=1D0 IF(ISTSB.EQ.2.OR.ISTSB.EQ.4) THEN NBW=0 DO 110 I=1,2 PMMN(I)=0D0 IF(KFPR(ISUB,I).EQ.0) THEN ELSEIF(MSTP(42).LE.0.OR.PMAS(PYCOMP(KFPR(ISUB,I)),2).LT. & PARP(41)) THEN IF(I.EQ.1) SQM3=PMAS(PYCOMP(KFPR(ISUB,I)),1)**2 IF(I.EQ.2) SQM4=PMAS(PYCOMP(KFPR(ISUB,I)),1)**2 ELSE NBW=NBW+1 C...This prevents SUSY/t particles from becoming too light. KFLW=KFPR(ISUB,I) IF(KFLW/KSUSY1.EQ.1.OR.KFLW/KSUSY1.EQ.2) THEN KCW=PYCOMP(KFLW) PMMN(I)=PMAS(KCW,1) DO 100 IDC=MDCY(KCW,2),MDCY(KCW,2)+MDCY(KCW,3)-1 IF(MDME(IDC,1).GT.0.AND.BRAT(IDC).GT.1E-4) THEN PMSUM=PMAS(PYCOMP(KFDP(IDC,1)),1)+ & PMAS(PYCOMP(KFDP(IDC,2)),1) IF(KFDP(IDC,3).NE.0) PMSUM=PMSUM+ & PMAS(PYCOMP(KFDP(IDC,3)),1) PMMN(I)=MIN(PMMN(I),PMSUM) ENDIF 100 CONTINUE ELSEIF(KFLW.EQ.6) THEN PMMN(I)=PMAS(24,1)+PMAS(5,1) ENDIF ENDIF 110 CONTINUE IF(NBW.GE.1) THEN CKIN41=CKIN(41) CKIN43=CKIN(43) CKIN(41)=MAX(PMMN(1),CKIN(41)) CKIN(43)=MAX(PMMN(2),CKIN(43)) CALL PYOFSH(3,0,KFPR(ISUB,1),KFPR(ISUB,2),0D0,PQM3,PQM4) CKIN(41)=CKIN41 CKIN(43)=CKIN43 IF(MINT(51).EQ.1) THEN WRITE(MSTU(11),5100) ISUB MSUB(ISUB)=0 GOTO 460 ENDIF SQM3=PQM3**2 SQM4=PQM4**2 ENDIF IF(MIN(SQM3,SQM4).LT.CKIN(6)**2) MINT(71)=1 IF(MINT(71).EQ.1) VINT(71)=MAX(CKIN(3),CKIN(5)) IF(ISUB.EQ.96.AND.MSTP(82).LE.1) THEN VINT(71)=PARP(81)*(VINT(1)/PARP(89))**PARP(90) ELSEIF(ISUB.EQ.96) THEN VINT(71)=0.08D0*PARP(82)*(VINT(1)/PARP(89))**PARP(90) ENDIF ENDIF VINT(63)=SQM3 VINT(64)=SQM4 C...Prepare for additional variable choices in 2 -> 3. IF(ISTSB.EQ.5) THEN VINT(201)=0D0 IF(KFPR(ISUB,2).GT.0) VINT(201)=PMAS(PYCOMP(KFPR(ISUB,2)),1) VINT(206)=VINT(201) VINT(204)=PMAS(23,1) IF(ISUB.EQ.124.OR.ISUB.EQ.351) VINT(204)=PMAS(24,1) IF(ISUB.EQ.352) VINT(204)=PMAS(63,1) IF(ISUB.EQ.121.OR.ISUB.EQ.122.OR.ISUB.EQ.181.OR.ISUB.EQ.182 & .OR.ISUB.EQ.186.OR.ISUB.EQ.187) VINT(204)=VINT(201) VINT(209)=VINT(204) ENDIF C...Number of points for each variable: tau, tau', y*, cos(theta-hat). NPTS(1)=2+2*MINT(72) IF(MINT(47).EQ.1) THEN IF(ISTSB.EQ.1.OR.ISTSB.EQ.2) NPTS(1)=1 ELSEIF(MINT(47).GE.5) THEN IF(ISTSB.LE.2.OR.ISTSB.GT.5) NPTS(1)=NPTS(1)+1 ENDIF NPTS(2)=1 IF(ISTSB.GE.3.AND.ISTSB.LE.5) THEN IF(MINT(47).GE.2) NPTS(2)=2 IF(MINT(47).GE.5) NPTS(2)=3 ENDIF NPTS(3)=1 IF(MINT(47).EQ.4.OR.MINT(47).EQ.5) THEN NPTS(3)=3 IF(MINT(45).EQ.3) NPTS(3)=NPTS(3)+1 IF(MINT(46).EQ.3) NPTS(3)=NPTS(3)+1 ENDIF NPTS(4)=1 IF(ISTSB.EQ.2.OR.ISTSB.EQ.4) NPTS(4)=5 NTRY=NPTS(1)*NPTS(2)*NPTS(3)*NPTS(4) C...Reset coefficients of cross-section weighting. DO 120 J=1,20 COEF(ISUB,J)=0D0 120 CONTINUE COEF(ISUB,1)=1D0 COEF(ISUB,8)=0.5D0 COEF(ISUB,9)=0.5D0 COEF(ISUB,13)=1D0 COEF(ISUB,18)=1D0 MCTH=0 MTAUP=0 METAUP=0 VINT(23)=0D0 VINT(26)=0D0 SIGSAM=0D0 C...Find limits and select tau, y*, cos(theta-hat) and tau' values, C...in grid of phase space points. CALL PYKLIM(1) METAU=MINT(51) NACC=0 DO 150 ITRY=1,NTRY MINT(51)=0 IF(METAU.EQ.1) GOTO 150 IF(MOD(ITRY-1,NPTS(2)*NPTS(3)*NPTS(4)).EQ.0) THEN MTAU=1+(ITRY-1)/(NPTS(2)*NPTS(3)*NPTS(4)) IF(MTAU.GT.2+2*MINT(72)) MTAU=7 RTAU=0.5D0 C...Special case when both resonances have same mass, C...as is often the case in process 194. IF(MINT(72).EQ.2) THEN IF(ABS(PMAS(KCR2,1)-PMAS(KCR1,1)).LT. & 0.01D0*(PMAS(KCR2,1)+PMAS(KCR1,1))) THEN IF(MTAU.EQ.3.OR.MTAU.EQ.4) THEN RTAU=0.4D0 ELSEIF(MTAU.EQ.5.OR.MTAU.EQ.6) THEN RTAU=0.6D0 ENDIF ENDIF ENDIF CALL PYKMAP(1,MTAU,RTAU) IF(ISTSB.GE.3.AND.ISTSB.LE.5) CALL PYKLIM(4) METAUP=MINT(51) ENDIF IF(METAUP.EQ.1) GOTO 150 IF(ISTSB.GE.3.AND.ISTSB.LE.5.AND.MOD(ITRY-1,NPTS(3)*NPTS(4)) & .EQ.0) THEN MTAUP=1+MOD((ITRY-1)/(NPTS(3)*NPTS(4)),NPTS(2)) CALL PYKMAP(4,MTAUP,0.5D0) ENDIF IF(MOD(ITRY-1,NPTS(3)*NPTS(4)).EQ.0) THEN CALL PYKLIM(2) MEYST=MINT(51) ENDIF IF(MEYST.EQ.1) GOTO 150 IF(MOD(ITRY-1,NPTS(4)).EQ.0) THEN MYST=1+MOD((ITRY-1)/NPTS(4),NPTS(3)) IF(MYST.EQ.4.AND.MINT(45).NE.3) MYST=5 CALL PYKMAP(2,MYST,0.5D0) CALL PYKLIM(3) MECTH=MINT(51) ENDIF IF(MECTH.EQ.1) GOTO 150 IF(ISTSB.EQ.2.OR.ISTSB.EQ.4) THEN MCTH=1+MOD(ITRY-1,NPTS(4)) CALL PYKMAP(3,MCTH,0.5D0) ENDIF IF(ISUB.EQ.96) VINT(25)=VINT(21)*(1D0-VINT(23)**2) C...Store position and limits. MINT(51)=0 CALL PYKLIM(0) IF(MINT(51).EQ.1) GOTO 150 NACC=NACC+1 MVARPT(NACC,1)=MTAU MVARPT(NACC,2)=MTAUP MVARPT(NACC,3)=MYST MVARPT(NACC,4)=MCTH DO 130 J=1,30 VINTPT(NACC,J)=VINT(10+J) 130 CONTINUE C...Normal case: calculate cross-section. IF(ISTSB.NE.5) THEN CALL PYSIGH(NCHN,SIGS) IF(MWTXS.EQ.1) THEN CALL PYEVWT(WTXS) SIGS=WTXS*SIGS ENDIF C..2 -> 3: find highest value out of a number of tries. ELSE SIGS=0D0 DO 140 IKIN3=1,MSTP(129) CALL PYKMAP(5,0,0D0) IF(MINT(51).EQ.1) GOTO 140 CALL PYSIGH(NCHN,SIGTMP) IF(MWTXS.EQ.1) THEN CALL PYEVWT(WTXS) SIGTMP=WTXS*SIGTMP ENDIF IF(SIGTMP.GT.SIGS) SIGS=SIGTMP 140 CONTINUE ENDIF C...Store cross-section. SIGSPT(NACC)=SIGS IF(SIGS.GT.SIGSAM) SIGSAM=SIGS IF(MSTP(122).GE.2) WRITE(MSTU(11),5200) MTAU,MYST,MCTH,MTAUP, & VINT(21),VINT(22),VINT(23),VINT(26),SIGS 150 CONTINUE IF(NACC.EQ.0) THEN WRITE(MSTU(11),5100) ISUB MSUB(ISUB)=0 GOTO 460 ELSEIF(SIGSAM.EQ.0D0) THEN WRITE(MSTU(11),5300) ISUB MSUB(ISUB)=0 GOTO 460 ENDIF IF(ISUB.NE.96) NPOSI=NPOSI+1 C...Calculate integrals in tau over maximal phase space limits. TAUMIN=VINT(11) TAUMAX=VINT(31) ATAU1=LOG(TAUMAX/TAUMIN) IF(NPTS(1).GE.2) THEN ATAU2=(TAUMAX-TAUMIN)/(TAUMAX*TAUMIN) ENDIF IF(NPTS(1).GE.4) THEN ATAU3=LOG(TAUMAX/TAUMIN*(TAUMIN+TAUR1)/(TAUMAX+TAUR1))/TAUR1 ATAU4=(ATAN((TAUMAX-TAUR1)/GAMR1)-ATAN((TAUMIN-TAUR1)/GAMR1))/ & GAMR1 ENDIF IF(NPTS(1).GE.6) THEN ATAU5=LOG(TAUMAX/TAUMIN*(TAUMIN+TAUR2)/(TAUMAX+TAUR2))/TAUR2 ATAU6=(ATAN((TAUMAX-TAUR2)/GAMR2)-ATAN((TAUMIN-TAUR2)/GAMR2))/ & GAMR2 ENDIF IF(NPTS(1).GT.2+2*MINT(72)) THEN ATAU7=LOG(MAX(2D-10,1D0-TAUMIN)/MAX(2D-10,1D0-TAUMAX)) ENDIF C...Reset. Sum up cross-sections in points calculated. DO 320 IVAR=1,4 IF(NPTS(IVAR).EQ.1) GOTO 320 IF(ISUB.EQ.96.AND.IVAR.EQ.4) GOTO 320 NBIN=NPTS(IVAR) DO 170 J1=1,NBIN NAREL(J1)=0 WTREL(J1)=0D0 COEFU(J1)=0D0 DO 160 J2=1,NBIN WTMAT(J1,J2)=0D0 160 CONTINUE 170 CONTINUE DO 180 IACC=1,NACC IBIN=MVARPT(IACC,IVAR) IF(IVAR.EQ.1.AND.IBIN.EQ.7) IBIN=3+2*MINT(72) IF(IVAR.EQ.3.AND.IBIN.EQ.5.AND.MINT(45).NE.3) IBIN=4 NAREL(IBIN)=NAREL(IBIN)+1 WTREL(IBIN)=WTREL(IBIN)+SIGSPT(IACC) C...Sum up tau cross-section pieces in points used. IF(IVAR.EQ.1) THEN TAU=VINTPT(IACC,11) WTMAT(IBIN,1)=WTMAT(IBIN,1)+1D0 WTMAT(IBIN,2)=WTMAT(IBIN,2)+(ATAU1/ATAU2)/TAU IF(NBIN.GE.4) THEN WTMAT(IBIN,3)=WTMAT(IBIN,3)+(ATAU1/ATAU3)/(TAU+TAUR1) WTMAT(IBIN,4)=WTMAT(IBIN,4)+(ATAU1/ATAU4)*TAU/ & ((TAU-TAUR1)**2+GAMR1**2) ENDIF IF(NBIN.GE.6) THEN WTMAT(IBIN,5)=WTMAT(IBIN,5)+(ATAU1/ATAU5)/(TAU+TAUR2) WTMAT(IBIN,6)=WTMAT(IBIN,6)+(ATAU1/ATAU6)*TAU/ & ((TAU-TAUR2)**2+GAMR2**2) ENDIF IF(NBIN.GT.2+2*MINT(72)) THEN WTMAT(IBIN,NBIN)=WTMAT(IBIN,NBIN)+(ATAU1/ATAU7)* & TAU/MAX(2D-10,1D0-TAU) ENDIF C...Sum up tau' cross-section pieces in points used. ELSEIF(IVAR.EQ.2) THEN TAU=VINTPT(IACC,11) TAUP=VINTPT(IACC,16) TAUPMN=VINTPT(IACC,6) TAUPMX=VINTPT(IACC,26) ATAUP1=LOG(TAUPMX/TAUPMN) ATAUP2=((1D0-TAU/TAUPMX)**4-(1D0-TAU/TAUPMN)**4)/(4D0*TAU) WTMAT(IBIN,1)=WTMAT(IBIN,1)+1D0 WTMAT(IBIN,2)=WTMAT(IBIN,2)+(ATAUP1/ATAUP2)* & (1D0-TAU/TAUP)**3/TAUP IF(NBIN.GE.3) THEN ATAUP3=LOG(MAX(2D-10,1D0-TAUPMN)/MAX(2D-10,1D0-TAUPMX)) WTMAT(IBIN,3)=WTMAT(IBIN,3)+(ATAUP1/ATAUP3)* & TAUP/MAX(2D-10,1D0-TAUP) ENDIF C...Sum up y* cross-section pieces in points used. ELSEIF(IVAR.EQ.3) THEN YST=VINTPT(IACC,12) YSTMIN=VINTPT(IACC,2) YSTMAX=VINTPT(IACC,22) AYST0=YSTMAX-YSTMIN AYST1=0.5D0*(YSTMAX-YSTMIN)**2 AYST2=AYST1 AYST3=2D0*(ATAN(EXP(YSTMAX))-ATAN(EXP(YSTMIN))) WTMAT(IBIN,1)=WTMAT(IBIN,1)+(AYST0/AYST1)*(YST-YSTMIN) WTMAT(IBIN,2)=WTMAT(IBIN,2)+(AYST0/AYST2)*(YSTMAX-YST) WTMAT(IBIN,3)=WTMAT(IBIN,3)+(AYST0/AYST3)/COSH(YST) IF(MINT(45).EQ.3) THEN TAUE=VINTPT(IACC,11) IF(ISTSB.GE.3.AND.ISTSB.LE.5) TAUE=VINTPT(IACC,16) YST0=-0.5D0*LOG(TAUE) AYST4=LOG(MAX(1D-10,EXP(YST0-YSTMIN)-1D0)/ & MAX(1D-10,EXP(YST0-YSTMAX)-1D0)) WTMAT(IBIN,4)=WTMAT(IBIN,4)+(AYST0/AYST4)/ & MAX(1D-10,1D0-EXP(YST-YST0)) ENDIF IF(MINT(46).EQ.3) THEN TAUE=VINTPT(IACC,11) IF(ISTSB.GE.3.AND.ISTSB.LE.5) TAUE=VINTPT(IACC,16) YST0=-0.5D0*LOG(TAUE) AYST5=LOG(MAX(1D-10,EXP(YST0+YSTMAX)-1D0)/ & MAX(1D-10,EXP(YST0+YSTMIN)-1D0)) WTMAT(IBIN,NBIN)=WTMAT(IBIN,NBIN)+(AYST0/AYST5)/ & MAX(1D-10,1D0-EXP(-YST-YST0)) ENDIF C...Sum up cos(theta-hat) cross-section pieces in points used. ELSE RM34=MAX(1D-20,2D0*SQM3*SQM4/(VINTPT(IACC,11)*VINT(2))**2) RSQM=1D0+RM34 CTHMAX=SQRT(1D0-4D0*VINT(71)**2/(TAUMAX*VINT(2))) CTHMIN=-CTHMAX IF(CTHMAX.GT.0.9999D0) RM34=MAX(RM34,2D0*VINT(71)**2/ & (TAUMAX*VINT(2))) ACTH1=CTHMAX-CTHMIN ACTH2=LOG(MAX(RM34,RSQM-CTHMIN)/MAX(RM34,RSQM-CTHMAX)) ACTH3=LOG(MAX(RM34,RSQM+CTHMAX)/MAX(RM34,RSQM+CTHMIN)) ACTH4=1D0/MAX(RM34,RSQM-CTHMAX)-1D0/MAX(RM34,RSQM-CTHMIN) ACTH5=1D0/MAX(RM34,RSQM+CTHMIN)-1D0/MAX(RM34,RSQM+CTHMAX) CTH=VINTPT(IACC,13) WTMAT(IBIN,1)=WTMAT(IBIN,1)+1D0 WTMAT(IBIN,2)=WTMAT(IBIN,2)+(ACTH1/ACTH2)/ & MAX(RM34,RSQM-CTH) WTMAT(IBIN,3)=WTMAT(IBIN,3)+(ACTH1/ACTH3)/ & MAX(RM34,RSQM+CTH) WTMAT(IBIN,4)=WTMAT(IBIN,4)+(ACTH1/ACTH4)/ & MAX(RM34,RSQM-CTH)**2 WTMAT(IBIN,5)=WTMAT(IBIN,5)+(ACTH1/ACTH5)/ & MAX(RM34,RSQM+CTH)**2 ENDIF 180 CONTINUE C...Check that equation system solvable. IF(MSTP(122).GE.2) WRITE(MSTU(11),5400) CVAR(IVAR) MSOLV=1 WTRELS=0D0 DO 190 IBIN=1,NBIN IF(MSTP(122).GE.2) WRITE(MSTU(11),5500) (WTMAT(IBIN,IRED), & IRED=1,NBIN),WTREL(IBIN) IF(NAREL(IBIN).EQ.0) MSOLV=0 WTRELS=WTRELS+WTREL(IBIN) 190 CONTINUE IF(ABS(WTRELS).LT.1D-20) MSOLV=0 C...Solve to find relative importance of cross-section pieces. IF(MSOLV.EQ.1) THEN DO 200 IBIN=1,NBIN WTRELN(IBIN)=MAX(0.1D0,WTREL(IBIN)/WTRELS) 200 CONTINUE DO 230 IRED=1,NBIN-1 DO 220 IBIN=IRED+1,NBIN IF(ABS(WTMAT(IRED,IRED)).LT.1D-20) THEN MSOLV=0 GOTO 260 ENDIF RQT=WTMAT(IBIN,IRED)/WTMAT(IRED,IRED) WTREL(IBIN)=WTREL(IBIN)-RQT*WTREL(IRED) DO 210 ICOE=IRED,NBIN WTMAT(IBIN,ICOE)=WTMAT(IBIN,ICOE)-RQT*WTMAT(IRED,ICOE) 210 CONTINUE 220 CONTINUE 230 CONTINUE DO 250 IRED=NBIN,1,-1 DO 240 ICOE=IRED+1,NBIN WTREL(IRED)=WTREL(IRED)-WTMAT(IRED,ICOE)*COEFU(ICOE) 240 CONTINUE COEFU(IRED)=WTREL(IRED)/WTMAT(IRED,IRED) 250 CONTINUE ENDIF C...Share evenly if failure. 260 IF(MSOLV.EQ.0) THEN DO 270 IBIN=1,NBIN COEFU(IBIN)=1D0 WTRELN(IBIN)=0.1D0 IF(WTRELS.GT.0D0) WTRELN(IBIN)=MAX(0.1D0, & WTREL(IBIN)/WTRELS) 270 CONTINUE ENDIF C...Normalize coefficients, with piece shared democratically. COEFSU=0D0 WTRELS=0D0 DO 280 IBIN=1,NBIN COEFU(IBIN)=MAX(0D0,COEFU(IBIN)) COEFSU=COEFSU+COEFU(IBIN) WTRELS=WTRELS+WTRELN(IBIN) 280 CONTINUE IF(COEFSU.GT.0D0) THEN DO 290 IBIN=1,NBIN COEFO(IBIN)=PARP(122)/NBIN+(1D0-PARP(122))*0.5D0* & (COEFU(IBIN)/COEFSU+WTRELN(IBIN)/WTRELS) 290 CONTINUE ELSE DO 300 IBIN=1,NBIN COEFO(IBIN)=1D0/NBIN 300 CONTINUE ENDIF IF(IVAR.EQ.1) IOFF=0 IF(IVAR.EQ.2) IOFF=17 IF(IVAR.EQ.3) IOFF=7 IF(IVAR.EQ.4) IOFF=12 DO 310 IBIN=1,NBIN ICOF=IOFF+IBIN IF(IVAR.EQ.1.AND.IBIN.GT.2+2*MINT(72)) ICOF=7 IF(IVAR.EQ.3.AND.IBIN.EQ.4.AND.MINT(45).NE.3) ICOF=ICOF+1 COEF(ISUB,ICOF)=COEFO(IBIN) 310 CONTINUE IF(MSTP(122).GE.2) WRITE(MSTU(11),5600) CVAR(IVAR), & (COEFO(IBIN),IBIN=1,NBIN) 320 CONTINUE C...Find two most promising maxima among points previously determined. DO 330 J=1,4 IACCMX(J)=0 SIGSMX(J)=0D0 330 CONTINUE NMAX=0 DO 390 IACC=1,NACC DO 340 J=1,30 VINT(10+J)=VINTPT(IACC,J) 340 CONTINUE IF(ISTSB.NE.5) THEN CALL PYSIGH(NCHN,SIGS) IF(MWTXS.EQ.1) THEN CALL PYEVWT(WTXS) SIGS=WTXS*SIGS ENDIF ELSE SIGS=0D0 DO 350 IKIN3=1,MSTP(129) CALL PYKMAP(5,0,0D0) IF(MINT(51).EQ.1) GOTO 350 CALL PYSIGH(NCHN,SIGTMP) IF(MWTXS.EQ.1) THEN CALL PYEVWT(WTXS) SIGTMP=WTXS*SIGTMP ENDIF IF(SIGTMP.GT.SIGS) SIGS=SIGTMP 350 CONTINUE ENDIF IEQ=0 DO 360 IMV=1,NMAX IF(ABS(SIGS-SIGSMX(IMV)).LT.1D-4*(SIGS+SIGSMX(IMV))) IEQ=IMV 360 CONTINUE IF(IEQ.EQ.0) THEN DO 370 IMV=NMAX,1,-1 IIN=IMV+1 IF(SIGS.LE.SIGSMX(IMV)) GOTO 380 IACCMX(IMV+1)=IACCMX(IMV) SIGSMX(IMV+1)=SIGSMX(IMV) 370 CONTINUE IIN=1 380 IACCMX(IIN)=IACC SIGSMX(IIN)=SIGS IF(NMAX.LE.1) NMAX=NMAX+1 ENDIF 390 CONTINUE C...Read out starting position for search. IF(MSTP(122).GE.2) WRITE(MSTU(11),5700) SIGSAM=SIGSMX(1) DO 440 IMAX=1,NMAX IACC=IACCMX(IMAX) MTAU=MVARPT(IACC,1) MTAUP=MVARPT(IACC,2) MYST=MVARPT(IACC,3) MCTH=MVARPT(IACC,4) VTAU=0.5D0 VYST=0.5D0 VCTH=0.5D0 VTAUP=0.5D0 C...Starting point and step size in parameter space. DO 430 IRPT=1,2 DO 420 IVAR=1,4 IF(NPTS(IVAR).EQ.1) GOTO 420 IF(IVAR.EQ.1) VVAR=VTAU IF(IVAR.EQ.2) VVAR=VTAUP IF(IVAR.EQ.3) VVAR=VYST IF(IVAR.EQ.4) VVAR=VCTH IF(IVAR.EQ.1) MVAR=MTAU IF(IVAR.EQ.2) MVAR=MTAUP IF(IVAR.EQ.3) MVAR=MYST IF(IVAR.EQ.4) MVAR=MCTH IF(IRPT.EQ.1) VDEL=0.1D0 IF(IRPT.EQ.2) VDEL=MAX(0.01D0,MIN(0.05D0,VVAR-0.02D0, & 0.98D0-VVAR)) IF(IRPT.EQ.1) VMAR=0.02D0 IF(IRPT.EQ.2) VMAR=0.002D0 IMOV0=1 IF(IRPT.EQ.1.AND.IVAR.EQ.1) IMOV0=0 DO 410 IMOV=IMOV0,8 C...Define new point in parameter space. IF(IMOV.EQ.0) THEN INEW=2 VNEW=VVAR ELSEIF(IMOV.EQ.1) THEN INEW=3 VNEW=VVAR+VDEL ELSEIF(IMOV.EQ.2) THEN INEW=1 VNEW=VVAR-VDEL ELSEIF(SIGSSM(3).GE.MAX(SIGSSM(1),SIGSSM(2)).AND. & VVAR+2D0*VDEL.LT.1D0-VMAR) THEN VVAR=VVAR+VDEL SIGSSM(1)=SIGSSM(2) SIGSSM(2)=SIGSSM(3) INEW=3 VNEW=VVAR+VDEL ELSEIF(SIGSSM(1).GE.MAX(SIGSSM(2),SIGSSM(3)).AND. & VVAR-2D0*VDEL.GT.VMAR) THEN VVAR=VVAR-VDEL SIGSSM(3)=SIGSSM(2) SIGSSM(2)=SIGSSM(1) INEW=1 VNEW=VVAR-VDEL ELSEIF(SIGSSM(3).GE.SIGSSM(1)) THEN VDEL=0.5D0*VDEL VVAR=VVAR+VDEL SIGSSM(1)=SIGSSM(2) INEW=2 VNEW=VVAR ELSE VDEL=0.5D0*VDEL VVAR=VVAR-VDEL SIGSSM(3)=SIGSSM(2) INEW=2 VNEW=VVAR ENDIF C...Convert to relevant variables and find derived new limits. ILERR=0 IF(IVAR.EQ.1) THEN VTAU=VNEW CALL PYKMAP(1,MTAU,VTAU) IF(ISTSB.GE.3.AND.ISTSB.LE.5) THEN CALL PYKLIM(4) IF(MINT(51).EQ.1) ILERR=1 ENDIF ENDIF IF(IVAR.LE.2.AND.ISTSB.GE.3.AND.ISTSB.LE.5.AND. & ILERR.EQ.0) THEN IF(IVAR.EQ.2) VTAUP=VNEW CALL PYKMAP(4,MTAUP,VTAUP) ENDIF IF(IVAR.LE.2.AND.ILERR.EQ.0) THEN CALL PYKLIM(2) IF(MINT(51).EQ.1) ILERR=1 ENDIF IF(IVAR.LE.3.AND.ILERR.EQ.0) THEN IF(IVAR.EQ.3) VYST=VNEW CALL PYKMAP(2,MYST,VYST) CALL PYKLIM(3) IF(MINT(51).EQ.1) ILERR=1 ENDIF IF((ISTSB.EQ.2.OR.ISTSB.EQ.4.OR.ISTSB.EQ.6).AND. & ILERR.EQ.0) THEN IF(IVAR.EQ.4) VCTH=VNEW CALL PYKMAP(3,MCTH,VCTH) ENDIF IF(ISUB.EQ.96) VINT(25)=VINT(21)*(1.-VINT(23)**2) C...Evaluate cross-section. Save new maximum. Final maximum. IF(ILERR.NE.0) THEN SIGS=0. ELSEIF(ISTSB.NE.5) THEN CALL PYSIGH(NCHN,SIGS) IF(MWTXS.EQ.1) THEN CALL PYEVWT(WTXS) SIGS=WTXS*SIGS ENDIF ELSE SIGS=0D0 DO 400 IKIN3=1,MSTP(129) CALL PYKMAP(5,0,0D0) IF(MINT(51).EQ.1) GOTO 400 CALL PYSIGH(NCHN,SIGTMP) IF(MWTXS.EQ.1) THEN CALL PYEVWT(WTXS) SIGTMP=WTXS*SIGTMP ENDIF IF(SIGTMP.GT.SIGS) SIGS=SIGTMP 400 CONTINUE ENDIF SIGSSM(INEW)=SIGS IF(SIGS.GT.SIGSAM) SIGSAM=SIGS IF(MSTP(122).GE.2) WRITE(MSTU(11),5800) IMAX,IVAR,MVAR, & IMOV,VNEW,VINT(21),VINT(22),VINT(23),VINT(26),SIGS 410 CONTINUE 420 CONTINUE 430 CONTINUE 440 CONTINUE IF(MSTP(121).EQ.1) SIGSAM=PARP(121)*SIGSAM XSEC(ISUB,1)=1.05D0*SIGSAM IF(MINT(141).NE.0.OR.MINT(142).NE.0) XSEC(ISUB,1)= & WTGAGA*XSEC(ISUB,1) 450 CONTINUE IF(MSTP(173).EQ.1.AND.ISUB.NE.96) XSEC(ISUB,1)= & PARP(174)*XSEC(ISUB,1) IF(ISUB.NE.96) XSEC(0,1)=XSEC(0,1)+XSEC(ISUB,1) 460 CONTINUE MINT(51)=0 C...Print summary table. IF(NPOSI.EQ.0) THEN WRITE(MSTU(11),5900) STOP ENDIF IF(MSTP(122).GE.1) THEN WRITE(MSTU(11),6000) WRITE(MSTU(11),6100) DO 470 ISUB=1,500 IF(MSUB(ISUB).NE.1.AND.ISUB.NE.96) GOTO 470 IF(ISUB.EQ.96.AND.MINT(50).EQ.0) GOTO 470 IF(ISUB.EQ.96.AND.MSUB(95).NE.1.AND.MSTP(81).LE.0) GOTO 470 IF(ISUB.EQ.96.AND.MINT(49).EQ.0.AND.MSTP(131).EQ.0) GOTO 470 IF(MSUB(95).EQ.1.AND.(ISUB.EQ.11.OR.ISUB.EQ.12.OR.ISUB.EQ.13 & .OR.ISUB.EQ.28.OR.ISUB.EQ.53.OR.ISUB.EQ.68)) GOTO 470 WRITE(MSTU(11),6200) ISUB,PROC(ISUB),XSEC(ISUB,1) 470 CONTINUE WRITE(MSTU(11),6300) ENDIF C...Format statements for maximization results. 5000 FORMAT(/1X,'Coefficient optimization and maximum search for ', &'subprocess no',I4/1X,'Coefficient modes tau',10X,'y*',9X, &'cth',9X,'tau''',7X,'sigma') 5100 FORMAT(1X,'Warning: requested subprocess ',I3,' has no allowed ', &'phase space.'/1X,'Process switched off!') 5200 FORMAT(1X,4I4,F12.8,F12.6,F12.7,F12.8,1P,D12.4) 5300 FORMAT(1X,'Warning: requested subprocess ',I3,' has vanishing ', &'cross-section.'/1X,'Process switched off!') 5400 FORMAT(1X,'Coefficients of equation system to be solved for ',A4) 5500 FORMAT(1X,1P,8D11.3) 5600 FORMAT(1X,'Result for ',A4,':',7F9.4) 5700 FORMAT(1X,'Maximum search for given coefficients'/2X,'MAX VAR ', &'MOD MOV VNEW',7X,'tau',7X,'y*',8X,'cth',7X,'tau''',7X,'sigma') 5800 FORMAT(1X,4I4,F8.4,F11.7,F9.3,F11.6,F11.7,1P,D12.4) 5900 FORMAT(1X,'Error: no requested process has non-vanishing ', &'cross-section.'/1X,'Execution stopped!') 6000 FORMAT(/1X,8('*'),1X,'PYMAXI: summary of differential ', &'cross-section maximum search',1X,8('*')) 6100 FORMAT(/11X,58('=')/11X,'I',38X,'I',17X,'I'/11X,'I ISUB ', &'Subprocess name',15X,'I Maximum value I'/11X,'I',38X,'I', &17X,'I'/11X,58('=')/11X,'I',38X,'I',17X,'I') 6200 FORMAT(11X,'I',2X,I3,3X,A28,2X,'I',2X,1P,D12.4,3X,'I') 6300 FORMAT(11X,'I',38X,'I',17X,'I'/11X,58('=')) RETURN END