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hvqpdfpho.f
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C**** DECEMBER 1990 :
C RENAME TO MLMGEN **** WHOLE NEW SET OF PDF: DO,EHLQ,DFLM,HMRS,MT
C**** JULY 1990 -- ADD MULTIHISTOGRAMMING
C**** JAN 29 , 1990 -- USE WEBBER ROUTINE FOR STRUCTURE FUNCTIONS
C**** JUNE 12 , 1989 -- ADD SCATTER PLOT ROUTINES, AND INCLUDE SOME
C UTILITIES (VSUM, DOT)
C**** DECEMBER 2, 1988 -- ADD EHLQ1,GHR
C**** NOVEMBER 9, 1988
C
C
C**** MLMGEN.FOR ********
C--- GENERAL UTILITY SUBROUTINES:
C--- STRUCTURE FUNCTIONS, VEGAS, HISTOGRAMMING&PLOTTING
C-----------------------------------------------------------------------
C------- START STRUCTURE FUNCTION SECTION -------------------------------
C--------------------------------------------------------------------------
C-------------------------------------------------------------------------
SUBROUTINE PRNTSF
C prints details of the structure function sets
C-------------------------------------------------------------------------
WRITE(*,100)
# ' Set Authors Lambda_4 Lambda_5_2loop Scheme'
# ,' 1 DO I * .200 * .340 MS '
# ,' 1 OW I PION * .200 * .340 MS '
# ,' 2 DO II * .400 * .680 MS '
# ,' 2 OW II PION * .400 * .680 MS '
# ,' 3 EHLQ I * .200 * .340 MS '
# ,' 4 EHLQ II * .290 * .490 MS '
# ,' 5 DFLM .160 .101 DI '
# ,' 6 DFLM .260 .173 DI '
# ,' 7 DFLM .360 .250 DI '
WRITE(*,100)
# ' 10 MRSA mod. .230 .151 MS '
# ,' 11 HMRS B .190 .122 MS '
# ,' 12 KMRS B .190 .122 MS '
# ,' 13 MRS B .135 .083 MS '
# ,' 14 MRS B .160 .101 MS '
# ,' 15 MRS B .200 .130 MS '
# ,' 16 MRS B .235 .155 MS '
# ,' 17 MRSS0 .215 .140 MS '
# ,' 18 MRSD0 .215 .140 MS '
# ,' 19 MRSD- .215 .140 MS '
# ,' 20 MRSA .230 .151 MS '
WRITE(*,100)
# ' 21 MT S1 .212 .138 DI '
# ,' 22 MT B1 .194 .125 DI '
# ,' 23 MT B2 .191 .123 DI '
# ,' 24 MT E1 .155 .097 DI '
# ,' 25 MT S1M .212 .138 MS '
# ,' 26 MT S2 .237 .156 DI '
# ,' 27 MT S2M .237 .156 MS '
# ,' 28 MT SL * .144 * .245 MS '
# ,' 31 SMRS PION1 .190 .122 MS '
# ,' 32 SMRS PION2 .190 .122 MS '
# ,' 33 SMRS PION3 .190 .122 MS '
# ,' 40 DGK PHOTON* .400* .680 MS '
# ,' 41 ACFGP-MC PH .200 .130 MS '
# ,' 42 AFG-MC PH .200 .130 MS '
# ,' 43 GRV-HO PH .200 .130 DI_G'
# ,' 44 LAC1 PH* .200 .130 MS '
# ,' 50 DGK EL* .400* .680 MS '
# ,' 51 LAC1 EL* .200 .130 MS '
# ,' 52 LAC2 EL* .200 .130 MS '
# ,' 53 LAC3 EL* .200 .130 MS '
# ,' 54 GS-G HO EL .200 .130 MS '
# ,' 55 GRV-G HO EL .200 .130 DI_G'
# ,' 56 ACFGP-MC EL .200 .130 MS '
# ,' 57 AFG-MC EL .200 .130 MS '
WRITE(*,100)
# ' 61 CTEQ1M .231 .152 MS '
# ,' 62 CTEQ1MS .231 .152 MS '
# ,' 63 CTEQ1ML .322 .220 MS '
# ,' 64 CTEQ1D .247 .164 DI '
# ,' 65 CTEQ1L * .168 * .125 * MS '
# ,' 66 CTEQ3M .239 .158 MS '
# ,' 67 CTEQ3L * .177 * .132 * MS '
# ,' 68 CTEQ3D .247 .164 DI '
WRITE(*,100)
# ' 71 MRSA prime .231 .152 MS '
# ,' 72 MRSG .255 .170 MS '
# ,' 73 MRS105 .158 .0994 MS '
# ,' 74 MRS110 .214 .140 MS '
# ,' 75 MRS115 .282 .190 MS '
# ,' 76 MRS120 .364 .253 MS '
# ,' 77 MRS125 .458 .328 MS '
# ,' 78 MRS130 .566 .416 MS '
WRITE(*,100)
# ' 81 CTEQ4M .298 .202 MS '
# ,' 82 CTEQ4D .298 .202 DI '
# ,' 83 CTEQ4L * .298 .202 MS '
# ,' 84 CTEQ4A1 .214 .140 MS '
# ,' 85 CTEQ4A2 .254 .169 MS '
# ,' 86 CTEQ4A4 .346 .239 MS '
# ,' 87 CTEQ4A5 .400 .281 MS '
# ,' 88 CTEQ4HJ .298 .202 MS '
# ,' 89 CTEQ4LQ .268 .179 MS '
WRITE(*,100)
# ' 91 MRSR1(1996) .241 .159 MS '
# ,' 92 MRSR2 .. .344 .237 MS '
# ,' 93 MRSR3 .. .241 .159 MS '
# ,' 94 MRSR4 .. .344 .237 MS '
# ,' 95 MRST1(1998) .321 .220 MS '
# ,' 96 MRSTH .. .321 .220 MS '
# ,' 97 MRSTL .. .321 .220 MS '
# ,' 98 MRSTM .. .247 .164 MS '
# ,' 99 MRSTP .. .409 .288 MS '
WRITE(*,100)
# ' 101 CTEQ5M .329 .226 (as=0.118) MS '
# ,' 102 CTEQ5D .329 .226 (as=0.118) DI '
# ,' 103 CTEQ5L .192 .146 (as=0.127) MS '
# ,' 104 CTEQ5HJ .329 .226 (as=0.118) MS '
# ,' 105 CTEQ5HQ .329 .226 (as=0.118) MS '
# ,' 106 CTEQ5F3 Nf=3, L_3=.395 (as=0.106) MS '
# ,' 107 CTEQ5F4 Nf=4, L_4=.309 (as=0.112) MS '
# ,' 108 CTEQ5M1 .329 .226 (as=0.118) MS '
# ,' 109 CTEQ5HQ1 .329 .226 (as=0.118) MS '
# ,' 110 CTEQ5M1(parametrized version) '
WRITE(*,100)
# ' 111 MRST99 COR01 .321 .220 MS '
# ,' 112 MRSTH COR02 .321 .220 MS '
# ,' 113 MRSTL COR03 .321 .220 MS '
# ,' 114 MRSTM COR04 .247 .164 MS '
# ,' 115 MRSTP COR05 .409 .288 MS '
# ,' 116 MRST99 COR06 .327 .224 MS '
# ,' 117 MRST99 COR07 .315 .215 MS '
# ,' 118 MRST99 COR08 .321 .220 MS '
# ,' 119 MRST99 COR09 .321 .220 MS '
# ,' 120 MRST99 COR10 .321 .220 MS '
# ,' 121 MRST99 COR11 .321 .220 MS '
# ,' 122 MRST99 COR12 .321 .220 MS '
WRITE(*,100)
# ' 131 CTEQ6M .326 .226 (as=0.118) MS '
# ,' 132 CTEQ6D .326 .226 (as=0.118) DI '
# ,' 133 CTEQ6L .326 .226 (as=0.118) MS '
# ,' 134-173 CTEQ6M1xx .326 .226 (as=0.118) MS '
write(*,100)
# ' 181 MRST200?NNLO av. .29 0.1805 (as=0.1155) MS '
# ,' 182 MRST200?NNLO fast .29 0.1805 (as=0.1155) MS '
# ,' 183 MRST200?NNLO slow .29 0.1805 (as=0.1155) MS '
# ,' 184 MRST200?NNLO jet .33 0.209 (as=0.118) MS '
# ,' 185 MRST2001 best fit .347 .239 (as=0.119) MS '
# ,' 186 MRST2001 low as .313 .214 (as=0.117) MS '
# ,' 187 MRST2001 high as .382 .267 (as=0.121) MS '
# ,' 188 MRST2001 jet fit .382 .267 (as=0.121) MS '
# ,' 189 MRST2001lo .566 .416 (as=0.130) LO '
write(*,100)
# ' 191 MRST2002 .359 .249 (as=0.1197) MS '
# ,' 192 MRST2002NNLO .289 .1795 (as=0.1154) MS '
# ,' 200-230 MRS2001E .347 .239 (as=0.119) MS '
write(*,100) ' Alekhin pdf sets;'
#, ' 231 LO nominal ffn; .4163 (as=0.1301)'
#, ' 232 LO nominal vfn'
#, ' 233 LO mc=1.85 ffn'
#, ' 234 LO mc=1.85 vfn'
#, ' 235 LO ss ffn'
#, ' 236 LO ss vfn'
#, ' 237 NL nominal ffn; .215 (as=0.1171)'
#, ' 238 NL nominal vfn'
#, ' 239 NL mc=1.85 ffn'
#, ' 240 NL mc=1.85 vfn'
#, ' 241 NL ss ffn'
#, ' 242 NL ss vfn'
#, ' 243 NNL nominal ffn; .1826 (as=0.1143)'
#, ' 244 NNL nominal vfn'
#, ' 245 NNL mc=1.85 ffn'
#, ' 246 NNL mc=1.85 vfn'
#, ' 247 NNL ss ffn'
#, ' 248 NNL ss vfn'
#, ' 249 NNL slow ev vfn'
#, ' 250 NNL slow ev vfn'
#, ' To get the sets with errorrs, replace the set number ndns'
#, ' with ndns + (2*i-k)*10^6; this will return the pdf'
#, ' minus (for k=1) or plus (for k=0) the variation'
#, ' of the |ith| parameter'
write(*,100) ' Cteq61'
#, ' 261 CTEQ6M (should be the same as 131)'
#, ' 262 CTEQ6D (should be the same as 132)'
#, ' 263 CTEQ6L (should be the same as 133)'
#, ' 264 CTEQ6L1'
#, ' 265 CTEQ6M (same as 261)'
#, ' 265 + (2*i-k)*10^6 returns the + (k=1) or - (k=0)'
#, ' variation of the ith eigenvector (i=1,20)'
#, ' (same as 234-273)'
#, ' 266 CTEQ6.1M, 265 + (2*i-k)*10^6 corresponding errors'
C ---------------------------------------------------------------------------
WRITE(*,100)
# ' PDF sets followed by * are obtained from a 1-loop analysis,'
# ,' and the relative values of Lambda_4 refer to 1-loop. '
# ,' Lambda is automatically converted to 2-loop for use with '
# ,' a 2-loop alpha in the program. The conversion is performed'
# ,' in such a way that at a scale of 10 GeV the value of alpha'
# ,' is the same. The MSbar subtr. scheme'
# ,' is used by default with 1-loop structure functions.'
# ,' MT set 26 has SU(3)-violating strange sea distributions'
# ,' Morfin and Tung sets labeled 25 and 27 are simply MSbar '
# ,' versions of sets 21 and 26, respectively.'
# ,' PDF sets 31-33 are the new NLO pion distributions by '
# ,' Sutton-MRS. Sets 13-16 are MRS fits of BCDMS data using'
# ,' different values of Lambda PHYS REV D43 (91) 3648.'
# ,' Sets 17-19 are the new NMC/CCFR fits by MRS (RAL-92-021)'
WRITE(*,100)
# ' Set 20: MRSA (Durham preprint, DTP/94/34)'
# ,' Set 71: MRSA prime (Durham preprint, DTP/95/14)'
# ,' Set 72: MRSG (Durham preprint, DTP/95/14)'
# ,' Sets 73-78 are the MRS structure functions '
# ,' with variable Lambda. The values of Lambda5 quoted '
# ,' here correspond to values of alpha(Mz) of 0.105,0.110,0.115'
# ,' 0.120,0.125,0.130, which is slightly different from the'
# ,' values one would obtain with the usual matching procedure'
# ,' from the corresponding value of Lambda4 quoted by MRS'
WRITE(*,100)
# ' Sets 61-65 are the CTEQ1 fits (61=default, 62=sing.gluon,'
# ,' 63= LEP lambda, 64=DIS scheme, 65=LO fit).'
# ,' Sets 81-89 are the CTEQ4 fits, H.L. Lai et al.,'
# ,' CTEQ-604, hep-ph/9606399, (81=default, 82=DIS scheme,'
# ,' 83=leading order, 84-87=variable Lambda, 88=High-et jet fit,'
# ,' 89=low momentum evolution)'
WRITE(*,100)
# ' Set 40 corresponds to photon PDF''s by Drees, Grassie, Kim'
# ,' Z.Phys. C28 (1985) 51 and DTP/91/16'
# ,' Set 41 corresponds to photon PDF''s Aurenche et al.'
# ,' Set 42 corresponds to photon PDF''s Aurenche et al. (1994)'
# ,' Set 43 corresponds to photon PDF''s Glueck et al.'
# ,' Set 44 corresponds to photon PDF''s Abramowicz et al.'
# ,' Set 50 corresponds to electron with photon DG'
# ,' Set 51 corresponds to electron with photon LAC1'
# ,' Set 52 corresponds to electron with photon LAC2'
# ,' Set 53 corresponds to electron with photon LAC3'
# ,' Set 54 corresponds to electron with photon GS-G HO'
# ,' Set 55 corresponds to electron with photon GRV-G HO'
# ,' Set 56 corresponds to electron with photon ACFGP-MC'
# ,' Set 57 corresponds to electron with photon AFG-MC'
# ,' GRV-G HO photon uses the DIS_gamma scheme, defined'
# ,' in Gluck, Reya and Vogt, Phys. Rev. D45(1992)3986.'
100 FORMAT(1X,A,100(/,1X,A))
END
SUBROUTINE PDFPAR(J0,IH,XLAM,SCHE,IRET)
PARAMETER (NPDF=266)
C LAMBDA VALUES (lAMBDA_5FLAVOUR_2LOOP) FOR DIFFERENT PARTON DENSITIES
IMPLICIT REAL * 8 (A-H,O-Z)
CHARACTER * 2 SCHE,SCH(NPDF)
DIMENSION XLA(NPDF)
DATA SCH/4*'MS',3*'DI',2*' ',
# 11*'MS',
# 4*'DI','MS','DI',2*'MS',2*' ',
# 3*'MS',6*' ',
# 3*'MS','DG','MS',5*' ',
# 5*'MS','DG',2*'MS',3*' ',
# 3*'MS','DI','MS',
c CTEQ3M
# 2*'MS','DI', 2*' ',
c MRSAp, MRSG, MRSalpha
# 8*'MS',2*' ',
c CTEQ4
# 'MS','DI',7*'MS',' ',
c MRSR and MRST
# 9*'MS',' ',
c CTEQ5
# 'MS','DI',6*'MS',2*'MS',
c MRST99
# 12*'MS',8*' ',
C CTEQ6
# 'MS', 'DI', 'MS', 40*'MS',7*' ',
c MRS200?NNLO
# 4*'MS',
c MRS2001
# 4*'MS','LO',' ',
c MRST2002
# 2*'MS',7*' ',
c MRST2002E
# 31*'MS',
c Alekhin
# 6*'LO',14*'MS',
# 10*' ',
c cteq6.1
# 'MS','DI',2*'LO',2*'MS'/
c
DATA XLA/
c 1 DO
# .34D0,.68D0,.34D0,.49D0,
# .101D0,.173D0,.250D0,2*0.D0,
c 10 MRSA mod
# .151d0,.122D0,.122D0,.083D0,.101D0,.130D0,.155D0,3*.140d0,.151d0,
c 21 MT S1
# .138D0,.125D0,.123D0,.097D0,.138d0,2*.156d0,.245d0,2*0.D0,
# 3*.122D0,6*0.D0,
# 0.68D0,4*.130D0,5*0.D0,
# 0.68D0,7*.130D0,3*0.D0,
c 61 CTEQ1M
# 2*0.152D0,0.220D0,0.164D0,0.125D0,
c 66 CTEQ3M
# .158d0,.132d0,.164d0,2*0.D0,
# 0.152D0,0.170D0,
c MRSA-alpha dependent
# 0.09936d0,0.1396d0,0.1903d0,0.2526d0,0.3276d0,0.4162d0,2*0.D0,
c The values given above for the MRSXXX sets are consistent with the
c alfas(Mz) given by MRS. The values
c # .094d0,0.130d0,0.178d0,0.237d0,0.309d0,0.396d0/
c are on the other hand consistent with the Lambda_4 given by MRS
c CTEQ4
# 3*0.2018d0,0.1396d0,0.1687d0,
# 0.2392d0,0.2811d0,0.2018d0,0.1793d0,0d0,
c 91-94 MRSR
# .159d0,.237d0,.159d0,.237d0,
c 95-99 MRST
# 3*.220d0,.164d0,.288d0,0d0,
c 101-108 cteq5
# 2*.226d0,1.d-8,2*.226d0,2*1.d-8,.226d0,2*.226d0,
c 111-122 MRST99
# 3*.220d0,.164d0,.288d0,.224d0,.215d0,5*.220d0,8*0d0,
C 131-173 CTEQ6
# 43*.226D0,7*0d0,
C 181-184, MRS200?NNLO
# 3*.1805d0,.2085d0,
c 185-189, MRS2002
#0.239d0,0.214d0,2*0.267d0,0.416,0d0,
c 191-192, MRST2002
#0.249d0,0.1795d0,7*0d0,
c 200-230
# 31*0.239d0,
c 231-250, Alekhin 20 sets
# 6*0.4163d0, 6*0.215d0, 8*0.1826d0,
c 251-260
# 10*0d0,
c CTEQ6.1
# 3*0.226d0,0d0,2*0.226d0/
c /
IRET=0
c if j0 >10^6 it is a pdf with error
if(j0.gt.1000000) then
jerr=(j0/1000000)
j=j0-jerr*1000000
else
j=j0
jerr=0
endif
IF(J.LT.1.OR.J.GT.NPDF) THEN
WRITE(*,*) ' PDF SET ',J,' NOT EXISTING'
IRET=1
RETURN
ENDIF
XLAM = XLA(J)
C SCHEME
SCHE = SCH(J)
IF(XLAM.EQ.0.OR.SCHE.EQ.' ') THEN
WRITE(*,*) ' PDF SET ',J,' NOT EXISTING'
IRET=1
RETURN
ENDIF
IF(
# ABS(IH).EQ.3
C It is a pion
# .AND.J.NE.1.AND.J.NE.2
C It is not Owens 1 or 2
# .AND.J.NE.31.AND.J.NE.32.AND.J.NE.33 )
C It is not SMRS 1-2-3
# THEN
WRITE(*,*) ' PDF SET ',J,' NOT AVAILABLE FOR PIONS'
IRET=1
RETURN
ENDIF
IF(
# ABS(IH).EQ.4
C It is a photon
# .AND. J.NE.40
C It is not Drees e Grassie
# .AND. J.NE.41
C It is not ACFGP
# .AND. J.NE.42
C It is not AFG
# .AND. J.NE.43
C It is not GRV-HO
# .AND. J.NE.44)
C It is not LAC1
C It is not a photon PDF
# THEN
WRITE(*,*) ' PDF SET ',J,' NOT AVAILABLE FOR PHOTONS'
IRET=1
RETURN
ENDIF
IF(
# ABS(IH).EQ.5
C It is an electron
# .AND. J.NE.40
C It is not Drees e Grassie
# .AND. J.NE.41
C It is not ACFGP
# .AND. J.NE.42
C It is not AFG
# .AND. J.NE.43
C It is not GRV-HO
# .AND. J.NE.44
C It is not LAC1
# .AND. J.NE.50
C It is not Drees e Grassie
# .AND. J.NE.51 .AND. J.NE.52 .AND. J.NE.53
C It is not LAC1, LAC2, LAC3
# .AND. J.NE.54
C It is not GS-G HO
# .AND. J.NE.55
C It is not GRV-G HO
# .AND. J.NE.56
C It is not ACFGP-MC
# .AND. J.NE.57 )
C It is not AFG-MC
# THEN
WRITE(*,*) ' PDF SET ',J,' NOT AVAILABLE FOR ELECTRON'
IRET=1
RETURN
ENDIF
END
C--------------------------------------------------
C- STRUCTURE FUNCTION MAIN PROGRAM
C--------------------------------------------------
SUBROUTINE MLMPDF(j0,IH,Q2,X,FX,NF)
REAL FX(-NF:NF),DISF(13)
INTEGER IPAR(-6:6)
DATA IPAR/12,11,10,9,7,8,13,2,1,3,4,5,6/
if(j0.gt.1000000) then
jerr=(j0/1000000)
ndns=j0-jerr*1000000
else
ndns=j0
jerr=0
endif
C Fix to prevent undefined math operations for x=1.
C Assumes that all structure functions vanish for x=1.
IF(1-X.EQ.0) THEN
DO J=-NF,NF
FX(J) = 0
ENDDO
RETURN
ENDIF
C
IH0=IH
IF(IH.EQ.0) IH0=1
IF(NDNS.LE.4) THEN
C--DO1,DO2,EHLQ1,EHLQ2
Q=SQRT(Q2)
CALL DOEHLQ(X,Q,IH0,NDNS,DISF,NF)
DO I =-NF,NF
FX(I) = DISF(IPAR(I)) / X
ENDDO
ELSEIF(NDNS.LE.9) THEN
C--DFLM
ISET=NDNS-4
CALL DFLM(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.10) THEN
C--MRSA modified
CALL XMRSA(Q2,X,FX,NF)
ELSEIF(NDNS.LE.20) THEN
C--MRS,HMRS,KMRS SETS
ISET=NDNS-10
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.30) THEN
C--MORFIN AND TUNG
ISET=NDNS-20
CALL TUNG(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.33) THEN
C--SUTTON MRS PIONS
ISET=NDNS-30
CALL PION(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.44) THEN
C--PHOTON PDFS
IF(IH.EQ.4) THEN
ISET=NDNS-40
IF(ISET.EQ.0) THEN
C--DREES,GRASSIE, KIM
CALL PHOPDF(Q2,X,FX,NF)
ELSEIF(ISET.EQ.1) THEN
C-- AURENCHE ET AL
CALL FONPDF(Q2,X,FX,NF)
ELSEIF(ISET.EQ.2) THEN
C-- AURENCHE 1994
CALL AFGPDF(Q2,X,FX,NF)
ELSEIF(ISET.EQ.3) THEN
C-- GLUECK NLO
CALL GRV_PH(Q2,X,FX,NF)
ELSEIF(ISET.EQ.4) THEN
C-- LAC
CALL XLAC(1,Q2,X,FX,NF)
ENDIF
ELSEIF(IH.EQ.5) THEN
C-- USER-DEFINED ELECTRON PDF
CALL ELPDF_USER(NDNS,Q2,X,FX,NF)
ENDIF
C--ELECTRON PDFS
ELSEIF(NDNS.LE.57) THEN
ISET=NDNS-50
IF(ISET.EQ.0) THEN
CALL ELPDF_DG(Q2,X,FX,NF)
ELSEIF(ISET.EQ.1) THEN
CALL ELPDF_LAC1(Q2,X,FX,NF)
ELSEIF(ISET.EQ.2) THEN
CALL ELPDF_LAC2(Q2,X,FX,NF)
ELSEIF(ISET.EQ.3) THEN
CALL ELPDF_LAC3(Q2,X,FX,NF)
ELSEIF(ISET.EQ.4) THEN
CALL ELPDF_GS(Q2,X,FX,NF)
ELSEIF(ISET.EQ.5) THEN
CALL ELPDF_GRV(Q2,X,FX,NF)
ELSEIF(ISET.EQ.6) THEN
CALL ELPDF_ACF(Q2,X,FX,NF)
ELSEIF(ISET.EQ.7) THEN
CALL ELPDF_AFG(Q2,X,FX,NF)
ENDIF
ELSEIF(NDNS.LE.65) THEN
C-- CTEQ1 FITS
ISET=NDNS-60
CALL CTEQ(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.70) THEN
C-- CTEQ3 FITS
ISET=NDNS-65
CALL CTEQ3(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.80) THEN
C-- MRSAP, MRSG AND MRS WITH VARIABLE LAMBDA
ISET=NDNS-60
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.89) THEN
C-- CTEQ4 FITS
ISET=NDNS-80
CALL CTEQ4(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.99) THEN
C-- MRSR/T sets
ISET=NDNS-60
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.110) THEN
C-- CTEQ5
ISET=NDNS-100
CALL CTEQ5(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.122) THEN
C-- MRST99 sets
ISET=NDNS-70
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.173) THEN
C-- CTEQ6 FITS
ISET=NDNS-130
IF(ISET.GE.4) ISET=ISET-3+100
CALL CTEQ6(ISET,IH0,Q2,X,FX,NF)
C-- MRSTNNLO (200?)
ELSEIF(NDNS.LE.184) THEN
ISET=NDNS-(184-56)
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
C-- MRST2001
ELSEIF(NDNS.LE.188) THEN
ISET=NDNS-(188-60)
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
C-- MRST2001 lo
ELSEIF(NDNS.EQ.189) THEN
ISET=NDNS-(189-61)
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
C-- MRST2002, MRST2002NNLO
ELSEIF(NDNS.LE.192) THEN
ISET=NDNS-(192-63)
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
C-- MRST2001E
ELSEIF(NDNS.LE.230) THEN
ISET=NDNS-(230-94)
CALL HMRS(ISET,IH0,Q2,X,FX,NF)
ELSEIF(NDNS.LE.250) THEN
ISET=NDNS-230
c turns jerr=1,...,30 to 1,-1,2,-2,...,15,-15
jerr=((1+jerr)/2)*(2*jerr-(jerr/2)*4-1)
call errsk(jerr)
CALL alekhin(iset,x,q2,fx,nf)
call hadconv(fx,ih0,nf)
ELSEif(ndns.le.260) then
WRITE(*,*) ' STRUCTURE FUNCTION SET NOT DEFINED , STOP'
STOP
elseif(ndns.le.266) then
C-- CTEQ6.1 FITS
ISET=NDNS-260
IF(ISET.GE.5) ISET=(ISET-4)*100+jerr
CALL CTEQ61(ISET,IH0,Q2,X,FX,NF)
else
WRITE(*,*) ' STRUCTURE FUNCTION SET NOT DEFINED , STOP'
STOP
ENDIF
IF(IH.EQ.0) THEN
FX(1) = 0.5 * ( FX(1)+FX(2) )
FX(-1) = 0.5 * ( FX(-1)+FX(-2) )
FX(2) = FX(1)
FX(-2) = FX(-1)
ENDIF
END
subroutine hadconv(fx,ih0,nf)
implicit none
integer nf,ih0,j
real * 4 fx(-nf:nf),tmp
if(ih0.eq.-1) then
c antiproton
do j=1,nf
tmp=fx(j)
fx(j)=fx(-j)
fx(-j)=tmp
enddo
elseif(ih0.eq.2) then
c neutron
tmp=fx(1)
fx(1)=fx(2)
fx(2)=tmp
tmp=fx(-1)
fx(-1)=fx(-2)
fx(-2)=tmp
elseif(ih0.eq.0) then
c nucleon
fx(1)=(fx(1)+fx(2))/2
fx(2)=fx(1)
fx(-1)=(fx(-1)+fx(-2))/2
fx(-2)=fx(-1)
elseif(ih0.ne.1) then
write(*,*) ' hadron ',ih0, 'not implemented'
stop
endif
end
C------------------------------------------------------------------------
SUBROUTINE DOEHLQ(X,SCALE,IDHAD,NSET,DIST,NF)
C NUCLEON AND PION STRUCTURE FUNCTIONS DIST=X*QRK(X,Q=SCALE)
C
C IDHAD = TYPE OF HADRON:
C 1 = P -1 = PBAR 2 = N -2 = NBAR 38 = PI+ 30 = PI-
C
C NSET = STRUCTURE FUNCTION SET
C = 1,2 FOR DUKE+OWENS SETS 1,2 (SOFT/HARD GLUE)
C = 3,4 FOR EICHTEN ET AL SETS 1,2 (NUCLEON ONLY)
C
C DUKE+OWENS = D.W.DUKE AND J.F.OWENS, PHYS. REV. D30 (1984) 49 (P/N)
C + J.F.OWENS, PHYS. REV. D30 (1984) 943 (PI+/-)
C WITH EXTRA SIGNIFICANT FIGURES VIA ED BERGER
C WARNING....MOMENTUM SUM RULE BADLY VIOLATED ABOVE 1 TEV
C PION NOT RELIABLE ABOVE SCALE = 50 GEV
C
C EICHTEN ET AL = E.EICHTEN,I.HINCHLIFFE,K.LANE AND C.QUIGG,
C REV. MOD. PHYS. 56 (1984) 579
C REVISED AS IN REV. MOD. PHYS. 58 (1986) 1065
C RELIABLE RANGE : SQRT(5)GEV < SCALE < 10TEV, 1E-4 < X < 1
C
C------------------------------------------------------------------------
REAL DIST(13),G(2),Q0(4),QL(4),F(5),A(6,5),B(3,6,5,4)
REAL XQ(6),TX(6),TT(6),TB(6),NEHLQ(8,2),CEHLQ(6,6,2,8,2)
REAL TBMIN(2),TTMIN(2)
DATA (((B(I,J,K,1),I=1,3),J=1,6),K=1,5)/
&3.,0.,0.,.419,.004383,-.007412,
&3.46,.72432,-.065998,4.4,-4.8644,1.3274,
&6*0.,1.,
&0.,0.,.763,-.23696,.025836,4.,.62664,-.019163,
&0.,-.42068,.032809,6*0.,1.265,-1.1323,.29268,
&0.,-.37162,-.028977,8.05,1.5877,-.15291,
&0.,6.3059,-.27342,0.,-10.543,-3.1674,
&0.,14.698,9.798,0.,.13479,-.074693,
&-.0355,-.22237,-.057685,6.3494,3.2649,-.90945,
&0.,-3.0331,1.5042,0.,17.431,-11.255,
&0.,-17.861,15.571,1.564,-1.7112,.63751,
&0.,-.94892,.32505,6.,1.4345,-1.0485,
&9.,-7.1858,.25494,0.,-16.457,10.947,
&0.,15.261,-10.085/
DATA (((B(I,J,K,2),I=1,3),J=1,6),K=1,5)/
&3.,0.,0.,.3743,.013946,-.00031695,
&3.329,.75343,-.076125,6.032,-6.2153,1.5561,
&6*0.,1.,0.,
&0.,.7608,-.2317,.023232,3.83,.62746,-.019155,
&0.,-.41843,.035972,6*0.,1.6714,-1.9168,.58175,
&0.,-.27307,-.16392,9.145,.53045,-.76271,
&0.,15.665,-2.8341,0.,-100.63,44.658,
&0.,223.24,-116.76,0.,.067368,-.030574,
&-.11989,-.23293,-.023273,3.5087,3.6554,-.45313,
&0.,-.47369,.35793,0.,9.5041,-5.4303,
&0.,-16.563,15.524,.8789,-.97093,.43388,
&0.,-1.1612,.4759,4.,1.2271,-.25369,
&9.,-5.6354,-.81747,0.,-7.5438,5.5034,
&0.,-.59649,.12611/
DATA (((B(I,J,K,3),I=1,3),J=1,6),K=1,5)/
&1.,0.,0.,0.4,-0.06212,-0.007109,0.7,0.6478,0.01335,27*0.,
&0.9,-0.2428,0.1386,0.,-0.2120,0.003671,5.0,0.8673,0.04747,
&0.,1.266,-2.215,0.,2.382,0.3482,3*0.,
&0.,0.07928,-0.06134,-0.02212,-0.3785,-0.1088,2.894,9.433,
&-10.852,0.,5.248,-7.187,0.,8.388,-11.61,3*0.,
&0.888,-1.802,1.812,0.,-1.576,1.20,3.11,-0.1317,0.5068,
&6.0,2.801,-12.16,0.,-17.28,20.49,3*0./
DATA (((B(I,J,K,4),I=1,3),J=1,6),K=1,5)/
&1.,0.,0.,0.4,-0.05909,-0.006524,0.628,0.6436,0.01451,27*0.,
&0.90,-0.1417,-0.1740,0.,-0.1697,-0.09623,5.0,-2.474,1.575,
&0.,-2.534,1.378,0.,0.5621,-0.2701,3*0.,
&0.,0.06229,-0.04099,-0.0882,-0.2892,-0.1082,1.924,0.2424,
&2.036,0.,-4.463,5.209,0.,-0.8367,-0.04840,3*0.,
&0.794,-0.9144,0.5966,0.,-1.237,0.6582,2.89,0.5966,-0.2550,
&6.0,-3.671,-2.304,0.,-8.191,7.758,3*0./
C...THE FOLLOWING DATA LINES ARE COEFFICIENTS NEEDED IN THE
C...EICHTEN, HINCHLIFFE, LANE, QUIGG PROTON STRUCTURE FUNCTION
C...POWERS OF 1-X IN DIFFERENT CASES
DATA NEHLQ/3,4,7,5,7,7,7,7,3,4,7,6,7,7,7,7/
C...EXPANSION COEFFICIENTS FOR UP VALENCE QUARK DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,1,1),IX=1,6),IT=1,6),NX=1,2)/
1 7.677E-01,-2.087E-01,-3.303E-01,-2.517E-02,-1.570E-02,-1.000E-04,
2-5.326E-01,-2.661E-01, 3.201E-01, 1.192E-01, 2.434E-02, 7.620E-03,
3 2.162E-01, 1.881E-01,-8.375E-02,-6.515E-02,-1.743E-02,-5.040E-03,
4-9.211E-02,-9.952E-02, 1.373E-02, 2.506E-02, 8.770E-03, 2.550E-03,
5 3.670E-02, 4.409E-02, 9.600E-04,-7.960E-03,-3.420E-03,-1.050E-03,
6-1.549E-02,-2.026E-02,-3.060E-03, 2.220E-03, 1.240E-03, 4.100E-04,
1 2.395E-01, 2.905E-01, 9.778E-02, 2.149E-02, 3.440E-03, 5.000E-04,
2 1.751E-02,-6.090E-03,-2.687E-02,-1.916E-02,-7.970E-03,-2.750E-03,
3-5.760E-03,-5.040E-03, 1.080E-03, 2.490E-03, 1.530E-03, 7.500E-04,
4 1.740E-03, 1.960E-03, 3.000E-04,-3.400E-04,-2.900E-04,-1.800E-04,
5-5.300E-04,-6.400E-04,-1.700E-04, 4.000E-05, 6.000E-05, 4.000E-05,
6 1.700E-04, 2.200E-04, 8.000E-05, 1.000E-05,-1.000E-05,-1.000E-05/
DATA (((CEHLQ(IX,IT,NX,1,2),IX=1,6),IT=1,6),NX=1,2)/
1 7.237E-01,-2.189E-01,-2.995E-01,-1.909E-02,-1.477E-02, 2.500E-04,
2-5.314E-01,-2.425E-01, 3.283E-01, 1.119E-01, 2.223E-02, 7.070E-03,
3 2.289E-01, 1.890E-01,-9.859E-02,-6.900E-02,-1.747E-02,-5.080E-03,
4-1.041E-01,-1.084E-01, 2.108E-02, 2.975E-02, 9.830E-03, 2.830E-03,
5 4.394E-02, 5.116E-02,-1.410E-03,-1.055E-02,-4.230E-03,-1.270E-03,
6-1.991E-02,-2.539E-02,-2.780E-03, 3.430E-03, 1.720E-03, 5.500E-04,
1 2.410E-01, 2.884E-01, 9.369E-02, 1.900E-02, 2.530E-03, 2.400E-04,
2 1.765E-02,-9.220E-03,-3.037E-02,-2.085E-02,-8.440E-03,-2.810E-03,
3-6.450E-03,-5.260E-03, 1.720E-03, 3.110E-03, 1.830E-03, 8.700E-04,
4 2.120E-03, 2.320E-03, 2.600E-04,-4.900E-04,-3.900E-04,-2.300E-04,
5-6.900E-04,-8.200E-04,-2.000E-04, 7.000E-05, 9.000E-05, 6.000E-05,
6 2.400E-04, 3.100E-04, 1.100E-04, 0.000E+00,-2.000E-05,-2.000E-05/
C...EXPANSION COEFFICIENTS FOR DOWN VALENCE QUARK DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,2,1),IX=1,6),IT=1,6),NX=1,2)/
1 3.813E-01,-8.090E-02,-1.634E-01,-2.185E-02,-8.430E-03,-6.200E-04,
2-2.948E-01,-1.435E-01, 1.665E-01, 6.638E-02, 1.473E-02, 4.080E-03,
3 1.252E-01, 1.042E-01,-4.722E-02,-3.683E-02,-1.038E-02,-2.860E-03,
4-5.478E-02,-5.678E-02, 8.900E-03, 1.484E-02, 5.340E-03, 1.520E-03,
5 2.220E-02, 2.567E-02,-3.000E-05,-4.970E-03,-2.160E-03,-6.500E-04,
6-9.530E-03,-1.204E-02,-1.510E-03, 1.510E-03, 8.300E-04, 2.700E-04,
1 1.261E-01, 1.354E-01, 3.958E-02, 8.240E-03, 1.660E-03, 4.500E-04,
2 3.890E-03,-1.159E-02,-1.625E-02,-9.610E-03,-3.710E-03,-1.260E-03,
3-1.910E-03,-5.600E-04, 1.590E-03, 1.590E-03, 8.400E-04, 3.900E-04,
4 6.400E-04, 4.900E-04,-1.500E-04,-2.900E-04,-1.800E-04,-1.000E-04,
5-2.000E-04,-1.900E-04, 0.000E+00, 6.000E-05, 4.000E-05, 3.000E-05,
6 7.000E-05, 8.000E-05, 2.000E-05,-1.000E-05,-1.000E-05,-1.000E-05/
DATA (((CEHLQ(IX,IT,NX,2,2),IX=1,6),IT=1,6),NX=1,2)/
1 3.578E-01,-8.622E-02,-1.480E-01,-1.840E-02,-7.820E-03,-4.500E-04,
2-2.925E-01,-1.304E-01, 1.696E-01, 6.243E-02, 1.353E-02, 3.750E-03,
3 1.318E-01, 1.041E-01,-5.486E-02,-3.872E-02,-1.038E-02,-2.850E-03,
4-6.162E-02,-6.143E-02, 1.303E-02, 1.740E-02, 5.940E-03, 1.670E-03,
5 2.643E-02, 2.957E-02,-1.490E-03,-6.450E-03,-2.630E-03,-7.700E-04,
6-1.218E-02,-1.497E-02,-1.260E-03, 2.240E-03, 1.120E-03, 3.500E-04,
1 1.263E-01, 1.334E-01, 3.732E-02, 7.070E-03, 1.260E-03, 3.400E-04,
2 3.660E-03,-1.357E-02,-1.795E-02,-1.031E-02,-3.880E-03,-1.280E-03,
3-2.100E-03,-3.600E-04, 2.050E-03, 1.920E-03, 9.800E-04, 4.400E-04,
4 7.700E-04, 5.400E-04,-2.400E-04,-3.900E-04,-2.400E-04,-1.300E-04,
5-2.600E-04,-2.300E-04, 2.000E-05, 9.000E-05, 6.000E-05, 4.000E-05,
6 9.000E-05, 1.000E-04, 2.000E-05,-2.000E-05,-2.000E-05,-1.000E-05/
C...EXPANSION COEFFICIENTS FOR UP AND DOWN SEA QUARK DISTRIBUTIONS
DATA (((CEHLQ(IX,IT,NX,3,1),IX=1,6),IT=1,6),NX=1,2)/
1 6.870E-02,-6.861E-02, 2.973E-02,-5.400E-03, 3.780E-03,-9.700E-04,
2-1.802E-02, 1.400E-04, 6.490E-03,-8.540E-03, 1.220E-03,-1.750E-03,
3-4.650E-03, 1.480E-03,-5.930E-03, 6.000E-04,-1.030E-03,-8.000E-05,
4 6.440E-03, 2.570E-03, 2.830E-03, 1.150E-03, 7.100E-04, 3.300E-04,
5-3.930E-03,-2.540E-03,-1.160E-03,-7.700E-04,-3.600E-04,-1.900E-04,
6 2.340E-03, 1.930E-03, 5.300E-04, 3.700E-04, 1.600E-04, 9.000E-05,
1 1.014E+00,-1.106E+00, 3.374E-01,-7.444E-02, 8.850E-03,-8.700E-04,
2 9.233E-01,-1.285E+00, 4.475E-01,-9.786E-02, 1.419E-02,-1.120E-03,
3 4.888E-02,-1.271E-01, 8.606E-02,-2.608E-02, 4.780E-03,-6.000E-04,
4-2.691E-02, 4.887E-02,-1.771E-02, 1.620E-03, 2.500E-04,-6.000E-05,
5 7.040E-03,-1.113E-02, 1.590E-03, 7.000E-04,-2.000E-04, 0.000E+00,
6-1.710E-03, 2.290E-03, 3.800E-04,-3.500E-04, 4.000E-05, 1.000E-05/
DATA (((CEHLQ(IX,IT,NX,3,2),IX=1,6),IT=1,6),NX=1,2)/
1 1.008E-01,-7.100E-02, 1.973E-02,-5.710E-03, 2.930E-03,-9.900E-04,
2-5.271E-02,-1.823E-02, 1.792E-02,-6.580E-03, 1.750E-03,-1.550E-03,
3 1.220E-02, 1.763E-02,-8.690E-03,-8.800E-04,-1.160E-03,-2.100E-04,
4-1.190E-03,-7.180E-03, 2.360E-03, 1.890E-03, 7.700E-04, 4.100E-04,
5-9.100E-04, 2.040E-03,-3.100E-04,-1.050E-03,-4.000E-04,-2.400E-04,
6 1.190E-03,-1.700E-04,-2.000E-04, 4.200E-04, 1.700E-04, 1.000E-04,
1 1.081E+00,-1.189E+00, 3.868E-01,-8.617E-02, 1.115E-02,-1.180E-03,
2 9.917E-01,-1.396E+00, 4.998E-01,-1.159E-01, 1.674E-02,-1.720E-03,
3 5.099E-02,-1.338E-01, 9.173E-02,-2.885E-02, 5.890E-03,-6.500E-04,
4-3.178E-02, 5.703E-02,-2.070E-02, 2.440E-03, 1.100E-04,-9.000E-05,
5 8.970E-03,-1.392E-02, 2.050E-03, 6.500E-04,-2.300E-04, 2.000E-05,
6-2.340E-03, 3.010E-03, 5.000E-04,-3.900E-04, 6.000E-05, 1.000E-05/
C...EXPANSION COEFFICIENTS FOR GLUON DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,4,1),IX=1,6),IT=1,6),NX=1,2)/
1 9.482E-01,-9.578E-01, 1.009E-01,-1.051E-01, 3.456E-02,-3.054E-02,
2-9.627E-01, 5.379E-01, 3.368E-01,-9.525E-02, 1.488E-02,-2.051E-02,
3 4.300E-01,-8.306E-02,-3.372E-01, 4.902E-02,-9.160E-03, 1.041E-02,
4-1.925E-01,-1.790E-02, 2.183E-01, 7.490E-03, 4.140E-03,-1.860E-03,
5 8.183E-02, 1.926E-02,-1.072E-01,-1.944E-02,-2.770E-03,-5.200E-04,
6-3.884E-02,-1.234E-02, 5.410E-02, 1.879E-02, 3.350E-03, 1.040E-03,
1 2.948E+01,-3.902E+01, 1.464E+01,-3.335E+00, 5.054E-01,-5.915E-02,
2 2.559E+01,-3.955E+01, 1.661E+01,-4.299E+00, 6.904E-01,-8.243E-02,
3-1.663E+00, 1.176E+00, 1.118E+00,-7.099E-01, 1.948E-01,-2.404E-02,
4-2.168E-01, 8.170E-01,-7.169E-01, 1.851E-01,-1.924E-02,-3.250E-03,
5 2.088E-01,-4.355E-01, 2.239E-01,-2.446E-02,-3.620E-03, 1.910E-03,
6-9.097E-02, 1.601E-01,-5.681E-02,-2.500E-03, 2.580E-03,-4.700E-04/
DATA (((CEHLQ(IX,IT,NX,4,2),IX=1,6),IT=1,6),NX=1,2)/
1 2.367E+00, 4.453E-01, 3.660E-01, 9.467E-02, 1.341E-01, 1.661E-02,
2-3.170E+00,-1.795E+00, 3.313E-02,-2.874E-01,-9.827E-02,-7.119E-02,
3 1.823E+00, 1.457E+00,-2.465E-01, 3.739E-02, 6.090E-03, 1.814E-02,
4-1.033E+00,-9.827E-01, 2.136E-01, 1.169E-01, 5.001E-02, 1.684E-02,
5 5.133E-01, 5.259E-01,-1.173E-01,-1.139E-01,-4.988E-02,-2.021E-02,
6-2.881E-01,-3.145E-01, 5.667E-02, 9.161E-02, 4.568E-02, 1.951E-02,
1 3.036E+01,-4.062E+01, 1.578E+01,-3.699E+00, 6.020E-01,-7.031E-02,
2 2.700E+01,-4.167E+01, 1.770E+01,-4.804E+00, 7.862E-01,-1.060E-01,
3-1.909E+00, 1.357E+00, 1.127E+00,-7.181E-01, 2.232E-01,-2.481E-02,
4-2.488E-01, 9.781E-01,-8.127E-01, 2.094E-01,-2.997E-02,-4.710E-03,
5 2.506E-01,-5.427E-01, 2.672E-01,-3.103E-02,-1.800E-03, 2.870E-03,
6-1.128E-01, 2.087E-01,-6.972E-02,-2.480E-03, 2.630E-03,-8.400E-04/
C...EXPANSION COEFFICIENTS FOR STRANGE SEA QUARK DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,5,1),IX=1,6),IT=1,6),NX=1,2)/
1 4.968E-02,-4.173E-02, 2.102E-02,-3.270E-03, 3.240E-03,-6.700E-04,
2-6.150E-03,-1.294E-02, 6.740E-03,-6.890E-03, 9.000E-04,-1.510E-03,
3-8.580E-03, 5.050E-03,-4.900E-03,-1.600E-04,-9.400E-04,-1.500E-04,
4 7.840E-03, 1.510E-03, 2.220E-03, 1.400E-03, 7.000E-04, 3.500E-04,
5-4.410E-03,-2.220E-03,-8.900E-04,-8.500E-04,-3.600E-04,-2.000E-04,
6 2.520E-03, 1.840E-03, 4.100E-04, 3.900E-04, 1.600E-04, 9.000E-05,
1 9.235E-01,-1.085E+00, 3.464E-01,-7.210E-02, 9.140E-03,-9.100E-04,
2 9.315E-01,-1.274E+00, 4.512E-01,-9.775E-02, 1.380E-02,-1.310E-03,
3 4.739E-02,-1.296E-01, 8.482E-02,-2.642E-02, 4.760E-03,-5.700E-04,
4-2.653E-02, 4.953E-02,-1.735E-02, 1.750E-03, 2.800E-04,-6.000E-05,
5 6.940E-03,-1.132E-02, 1.480E-03, 6.500E-04,-2.100E-04, 0.000E+00,
6-1.680E-03, 2.340E-03, 4.200E-04,-3.400E-04, 5.000E-05, 1.000E-05/
DATA (((CEHLQ(IX,IT,NX,5,2),IX=1,6),IT=1,6),NX=1,2)/
1 6.478E-02,-4.537E-02, 1.643E-02,-3.490E-03, 2.710E-03,-6.700E-04,
2-2.223E-02,-2.126E-02, 1.247E-02,-6.290E-03, 1.120E-03,-1.440E-03,
3-1.340E-03, 1.362E-02,-6.130E-03,-7.900E-04,-9.000E-04,-2.000E-04,
4 5.080E-03,-3.610E-03, 1.700E-03, 1.830E-03, 6.800E-04, 4.000E-04,
5-3.580E-03, 6.000E-05,-2.600E-04,-1.050E-03,-3.800E-04,-2.300E-04,
6 2.420E-03, 9.300E-04,-1.000E-04, 4.500E-04, 1.700E-04, 1.100E-04,
1 9.868E-01,-1.171E+00, 3.940E-01,-8.459E-02, 1.124E-02,-1.250E-03,
2 1.001E+00,-1.383E+00, 5.044E-01,-1.152E-01, 1.658E-02,-1.830E-03,
3 4.928E-02,-1.368E-01, 9.021E-02,-2.935E-02, 5.800E-03,-6.600E-04,
4-3.133E-02, 5.785E-02,-2.023E-02, 2.630E-03, 1.600E-04,-8.000E-05,
5 8.840E-03,-1.416E-02, 1.900E-03, 5.800E-04,-2.500E-04, 1.000E-05,
6-2.300E-03, 3.080E-03, 5.500E-04,-3.700E-04, 7.000E-05, 1.000E-05/
C...EXPANSION COEFFICIENTS FOR CHARM SEA QUARK DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,6,1),IX=1,6),IT=1,6),NX=1,2)/
1 9.270E-03,-1.817E-02, 9.590E-03,-6.390E-03, 1.690E-03,-1.540E-03,
2 5.710E-03,-1.188E-02, 6.090E-03,-4.650E-03, 1.240E-03,-1.310E-03,
3-3.960E-03, 7.100E-03,-3.590E-03, 1.840E-03,-3.900E-04, 3.400E-04,
4 1.120E-03,-1.960E-03, 1.120E-03,-4.800E-04, 1.000E-04,-4.000E-05,
5 4.000E-05,-3.000E-05,-1.800E-04, 9.000E-05,-5.000E-05,-2.000E-05,
6-4.200E-04, 7.300E-04,-1.600E-04, 5.000E-05, 5.000E-05, 5.000E-05,
1 8.098E-01,-1.042E+00, 3.398E-01,-6.824E-02, 8.760E-03,-9.000E-04,
2 8.961E-01,-1.217E+00, 4.339E-01,-9.287E-02, 1.304E-02,-1.290E-03,
3 3.058E-02,-1.040E-01, 7.604E-02,-2.415E-02, 4.600E-03,-5.000E-04,
4-2.451E-02, 4.432E-02,-1.651E-02, 1.430E-03, 1.200E-04,-1.000E-04,
5 1.122E-02,-1.457E-02, 2.680E-03, 5.800E-04,-1.200E-04, 3.000E-05,
6-7.730E-03, 7.330E-03,-7.600E-04,-2.400E-04, 1.000E-05, 0.000E+00/
DATA (((CEHLQ(IX,IT,NX,6,2),IX=1,6),IT=1,6),NX=1,2)/
1 9.980E-03,-1.945E-02, 1.055E-02,-6.870E-03, 1.860E-03,-1.560E-03,
2 5.700E-03,-1.203E-02, 6.250E-03,-4.860E-03, 1.310E-03,-1.370E-03,
3-4.490E-03, 7.990E-03,-4.170E-03, 2.050E-03,-4.400E-04, 3.300E-04,
4 1.470E-03,-2.480E-03, 1.460E-03,-5.700E-04, 1.200E-04,-1.000E-05,
5-9.000E-05, 1.500E-04,-3.200E-04, 1.200E-04,-6.000E-05,-4.000E-05,
6-4.200E-04, 7.600E-04,-1.400E-04, 4.000E-05, 7.000E-05, 5.000E-05,
1 8.698E-01,-1.131E+00, 3.836E-01,-8.111E-02, 1.048E-02,-1.300E-03,
2 9.626E-01,-1.321E+00, 4.854E-01,-1.091E-01, 1.583E-02,-1.700E-03,
3 3.057E-02,-1.088E-01, 8.022E-02,-2.676E-02, 5.590E-03,-5.600E-04,
4-2.845E-02, 5.164E-02,-1.918E-02, 2.210E-03,-4.000E-05,-1.500E-04,
5 1.311E-02,-1.751E-02, 3.310E-03, 5.100E-04,-1.200E-04, 5.000E-05,
6-8.590E-03, 8.380E-03,-9.200E-04,-2.600E-04, 1.000E-05,-1.000E-05/
C...EXPANSION COEFFICIENTS FOR BOTTOM SEA QUARK DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,7,1),IX=1,6),IT=1,6),NX=1,2)/
1 9.010E-03,-1.401E-02, 7.150E-03,-4.130E-03, 1.260E-03,-1.040E-03,
2 6.280E-03,-9.320E-03, 4.780E-03,-2.890E-03, 9.100E-04,-8.200E-04,
3-2.930E-03, 4.090E-03,-1.890E-03, 7.600E-04,-2.300E-04, 1.400E-04,
4 3.900E-04,-1.200E-03, 4.400E-04,-2.500E-04, 2.000E-05,-2.000E-05,
5 2.600E-04, 1.400E-04,-8.000E-05, 1.000E-04, 1.000E-05, 1.000E-05,
6-2.600E-04, 3.200E-04, 1.000E-05,-1.000E-05, 1.000E-05,-1.000E-05,
1 8.029E-01,-1.075E+00, 3.792E-01,-7.843E-02, 1.007E-02,-1.090E-03,
2 7.903E-01,-1.099E+00, 4.153E-01,-9.301E-02, 1.317E-02,-1.410E-03,
3-1.704E-02,-1.130E-02, 2.882E-02,-1.341E-02, 3.040E-03,-3.600E-04,
4-7.200E-04, 7.230E-03,-5.160E-03, 1.080E-03,-5.000E-05,-4.000E-05,
5 3.050E-03,-4.610E-03, 1.660E-03,-1.300E-04,-1.000E-05, 1.000E-05,
6-4.360E-03, 5.230E-03,-1.610E-03, 2.000E-04,-2.000E-05, 0.000E+00/
DATA (((CEHLQ(IX,IT,NX,7,2),IX=1,6),IT=1,6),NX=1,2)/
1 8.980E-03,-1.459E-02, 7.510E-03,-4.410E-03, 1.310E-03,-1.070E-03,
2 5.970E-03,-9.440E-03, 4.800E-03,-3.020E-03, 9.100E-04,-8.500E-04,
3-3.050E-03, 4.440E-03,-2.100E-03, 8.500E-04,-2.400E-04, 1.400E-04,
4 5.300E-04,-1.300E-03, 5.600E-04,-2.700E-04, 3.000E-05,-2.000E-05,
5 2.000E-04, 1.400E-04,-1.100E-04, 1.000E-04, 0.000E+00, 0.000E+00,
6-2.600E-04, 3.200E-04, 0.000E+00,-3.000E-05, 1.000E-05,-1.000E-05,
1 8.672E-01,-1.174E+00, 4.265E-01,-9.252E-02, 1.244E-02,-1.460E-03,
2 8.500E-01,-1.194E+00, 4.630E-01,-1.083E-01, 1.614E-02,-1.830E-03,
3-2.241E-02,-5.630E-03, 2.815E-02,-1.425E-02, 3.520E-03,-4.300E-04,
4-7.300E-04, 8.030E-03,-5.780E-03, 1.380E-03,-1.300E-04,-4.000E-05,
5 3.460E-03,-5.380E-03, 1.960E-03,-2.100E-04, 1.000E-05, 1.000E-05,
6-4.850E-03, 5.950E-03,-1.890E-03, 2.600E-04,-3.000E-05, 0.000E+00/
C...EXPANSION COEFFICIENTS FOR TOP SEA QUARK DISTRIBUTION
DATA (((CEHLQ(IX,IT,NX,8,1),IX=1,6),IT=1,6),NX=1,2)/
1 4.410E-03,-7.480E-03, 3.770E-03,-2.580E-03, 7.300E-04,-7.100E-04,
2 3.840E-03,-6.050E-03, 3.030E-03,-2.030E-03, 5.800E-04,-5.900E-04,
3-8.800E-04, 1.660E-03,-7.500E-04, 4.700E-04,-1.000E-04, 1.000E-04,
4-8.000E-05,-1.500E-04, 1.200E-04,-9.000E-05, 3.000E-05, 0.000E+00,
5 1.300E-04,-2.200E-04,-2.000E-05,-2.000E-05,-2.000E-05,-2.000E-05,
6-7.000E-05, 1.900E-04,-4.000E-05, 2.000E-05, 0.000E+00, 0.000E+00,
1 6.623E-01,-9.248E-01, 3.519E-01,-7.930E-02, 1.110E-02,-1.180E-03,
2 6.380E-01,-9.062E-01, 3.582E-01,-8.479E-02, 1.265E-02,-1.390E-03,
3-2.581E-02, 2.125E-02, 4.190E-03,-4.980E-03, 1.490E-03,-2.100E-04,
4 7.100E-04, 5.300E-04,-1.270E-03, 3.900E-04,-5.000E-05,-1.000E-05,
5 3.850E-03,-5.060E-03, 1.860E-03,-3.500E-04, 4.000E-05, 0.000E+00,
6-3.530E-03, 4.460E-03,-1.500E-03, 2.700E-04,-3.000E-05, 0.000E+00/
DATA (((CEHLQ(IX,IT,NX,8,2),IX=1,6),IT=1,6),NX=1,2)/
1 4.260E-03,-7.530E-03, 3.830E-03,-2.680E-03, 7.600E-04,-7.300E-04,
2 3.640E-03,-6.050E-03, 3.030E-03,-2.090E-03, 5.900E-04,-6.000E-04,
3-9.200E-04, 1.710E-03,-8.200E-04, 5.000E-04,-1.200E-04, 1.000E-04,
4-5.000E-05,-1.600E-04, 1.300E-04,-9.000E-05, 3.000E-05, 0.000E+00,
5 1.300E-04,-2.100E-04,-1.000E-05,-2.000E-05,-2.000E-05,-1.000E-05,
6-8.000E-05, 1.800E-04,-5.000E-05, 2.000E-05, 0.000E+00, 0.000E+00,
1 7.146E-01,-1.007E+00, 3.932E-01,-9.246E-02, 1.366E-02,-1.540E-03,
2 6.856E-01,-9.828E-01, 3.977E-01,-9.795E-02, 1.540E-02,-1.790E-03,
3-3.053E-02, 2.758E-02, 2.150E-03,-4.880E-03, 1.640E-03,-2.500E-04,
4 9.200E-04, 4.200E-04,-1.340E-03, 4.600E-04,-8.000E-05,-1.000E-05,
5 4.230E-03,-5.660E-03, 2.140E-03,-4.300E-04, 6.000E-05, 0.000E+00,
6-3.890E-03, 5.000E-03,-1.740E-03, 3.300E-04,-4.000E-05, 0.000E+00/
DATA TBMIN,TTMIN/8.1905,7.4474,11.5528,10.8097/
DATA XOLD,QOLD,IOLD,NOLD/-1.,0.,0,0/
DATA DMIN,Q0,QL/1.E-15,2*2.,2*2.236,.2,.4,.2,.29/
DATA IXLOW,IQLOW,IQHIG/0,0,0/
XMWN=1.-X
QSCA=ABS(SCALE)
ISET=MOD(NSET,100)
IF (QSCA.LT.Q0(ISET)) THEN
QSCA=Q0(ISET)
IF(IQLOW.LE.100) THEN
IQLOW=IQLOW+1
CALL MWARN('DOEHLQ')
IF(IQLOW.EQ.100) WRITE(*,*) ' LAST WARNING'
WRITE(*,*) ' Q SCALE SMALLER THAN ALLOWED, SET TO MINIMUM'
WRITE(*,*) '*********************************************'
ENDIF
ELSEIF (QSCA.GT.1.E4) THEN
QSCA=Q0(ISET)
IF(IQHIG.LE.100) THEN
IQHIG=IQHIG+1
CALL MWARN('DOEHLQ')
IF(IQHIG.EQ.100) WRITE(*,*) ' LAST WARNING'
WRITE(*,*) ' Q SCALE LARGER THAN ALLOWED, SET TO MAXIMUM'
WRITE(*,*) '*********************************************'
ENDIF
ENDIF
IF(X.LT.1.E-4) THEN
IF(IXLOW.LE.100) THEN
IXLOW=IXLOW+1
CALL MWARN('DOEHLQ')
IF(IXLOW.EQ.100) WRITE(*,*) ' LAST WARNING'
WRITE(*,*) ' X VALUE SMALLER THAN ALLOWED (1.E-4)'
WRITE(*,*) '*********************************************'
ENDIF
ENDIF
IF (QSCA.NE.QOLD.OR.IDHAD.NE.IOLD.OR.NSET.NE.NOLD) THEN
QOLD=QSCA
IOLD=IDHAD
NOLD=NSET
SS=LOG(QSCA/QL(ISET))
SMIN=LOG(Q0(ISET)/QL(ISET))
IF (ISET.LT.3) THEN
S=LOG(SS/SMIN)
ELSEIF (ISET.LT.5) THEN
T=2.*SS
TMIN=2.*SMIN
TMAX=2.*LOG(1.E4/QL(ISET))
ENDIF
GG=1.
C
IF (ABS(IDHAD).LT.3) THEN
IF (ISET.LT.3) THEN
C...........DUKE AND OWENS NUCLEONS
IP=ISET
DO 10 I=1,5
DO 10 J=1,6
10 A(J,I)=B(1,J,I,IP)+S*(B(2,J,I,IP)+S*B(3,J,I,IP))
DO 20 K=1,2
AA=1.+A(2,K)+A(3,K)
20 G(K)=SPLGAM(AA)/((1.+A(2,K)*A(4,K)/AA)*SPLGAM(A(2,K))
& *SPLGAM(1.+A(3,K)))
ELSE
C...........EHLQ NUCLEONS
IP=ISET-2
VT=MAX(-1.,MIN(1.,(2.*T-TMAX-TMIN)/(TMAX-TMIN)))
WT=VT*VT
C...CHEBYSHEV POLYNOMIALS FOR T EXPANSION
TT(1)=1.
TT(2)=VT
TT(3)= 2.*WT- 1.
TT(4)= (4.*WT- 3.)*VT
TT(5)= (8.*WT- 8.)*WT+1.
TT(6)=((16.*WT-20.)*WT+5.)*VT
ENDIF
ELSEIF (ISET.LT.3) THEN
C...........DUKE AND OWENS PION
IP=ISET+2
DO 30 I=1,5
DO 30 J=1,6
30 A(J,I)=B(1,J,I,IP)+S*(B(2,J,I,IP)+S*B(3,J,I,IP))
AA=1.+A(2,1)+A(3,1)
G(1)=SPLGAM(AA)/(SPLGAM(A(2,1))*SPLGAM(1.+A(3,1)))
G(2)=0.
ENDIF
ENDIF