Hi I am trying to calculate the cross-section for the process p p > t t~ [QCD] for LO and NLO (the measured inclusive value of cross-section is 830+-50pb) BUT i got changed results the value of cross-section i have got is 456.5 ± 2.2 pb for LO and 676.5 ± 3.9 pb

3.2.0 t t~ [QCD] output anees ]]> ###################################################################### ## PARAM_CARD AUTOMATICALY GENERATED BY MG5 FOLLOWING UFO MODEL #### ###################################################################### ## ## ## Width set on Auto will be computed following the information ## ## present in the decay.py files of the model. ## ## See arXiv:1402.1178 for more details. ## ## ## ###################################################################### ################################### ## INFORMATION FOR MASS ################################### Block mass 5 4.700000e+00 # MB 6 1.735000e+02 # MT 15 1.777000e+00 # MTA 23 9.118800e+01 # MZ 25 1.250000e+02 # MH ## Dependent parameters, given by model restrictions. ## Those values should be edited following the ## analytical expression. MG5 ignores those values ## but they are important for interfacing the output of MG5 ## to external program such as Pythia. 1 0.000000e+00 # d : 0.0 2 0.000000e+00 # u : 0.0 3 0.000000e+00 # s : 0.0 4 0.000000e+00 # c : 0.0 11 0.000000e+00 # e- : 0.0 12 0.000000e+00 # ve : 0.0 13 0.000000e+00 # mu- : 0.0 14 0.000000e+00 # vm : 0.0 16 0.000000e+00 # vt : 0.0 21 0.000000e+00 # g : 0.0 22 0.000000e+00 # a : 0.0 24 8.041900e+01 # w+ : cmath.sqrt(MZ__exp__2/2. + cmath.sqrt(MZ__exp__4/4. - (aEW*cmath.pi*MZ__exp__2)/(Gf*sqrt__2))) ################################### ## INFORMATION FOR SMINPUTS ################################### Block sminputs 1 1.325070e+02 # aEWM1 2 1.166390e-05 # Gf 3 1.180000e-01 # aS (Note that Parameter not used if you use a PDF set) ################################### ## INFORMATION FOR YUKAWA ################################### Block yukawa 5 4.700000e+00 # ymb 6 1.730000e+02 # ymt 15 1.777000e+00 # ymtau ################################### ## INFORMATION FOR DECAY ################################### Block QNUMBERS 82 # gh 1 0 # 3 times electric charge 2 1 # number of spin states (2S+1) 3 8 # colour rep (1: singlet, 3: triplet, 8: octet) 4 1 # Particle/Antiparticle distinction (0=own anti) # #************************* # Decay widths * #************************* # # PDG Width DECAY 1 0.000000e+00 # # PDG Width DECAY 2 0.000000e+00 # # PDG Width DECAY 3 0.000000e+00 # # PDG Width DECAY 4 0.000000e+00 # # PDG Width DECAY 5 0.000000e+00 # # PDG Width DECAY 6 1.506600e+00 # BR NDA ID1 ID2 ... 1.000000e+00 2 5 24 # 1.5066 # # PDG Width DECAY 11 0.000000e+00 # # PDG Width DECAY 12 0.000000e+00 # # PDG Width DECAY 13 0.000000e+00 # # PDG Width DECAY 14 0.000000e+00 # # PDG Width DECAY 15 0.000000e+00 # # PDG Width DECAY 16 0.000000e+00 # # PDG Width DECAY 21 0.000000e+00 # # PDG Width DECAY 22 0.000000e+00 # # PDG Width DECAY 23 2.441756e+00 # BR NDA ID1 ID2 ... 1.523658e-01 2 -1 1 # 0.37204010634479995 1.523658e-01 2 -3 3 # 0.37204010634479995 1.507440e-01 2 -5 5 # 0.36808006646399993 1.188141e-01 2 -2 2 # 0.2901150415596 1.188141e-01 2 -4 4 # 0.2901150415596 6.793744e-02 2 -12 12 # 0.1658866761622 6.793744e-02 2 -14 14 # 0.1658866761622 6.793744e-02 2 -16 16 # 0.1658866761622 3.438713e-02 2 -11 11 # 0.08396500541783998 3.438713e-02 2 -13 13 # 0.08396500541783998 3.430972e-02 2 -15 15 # 0.08377598908587996 # # PDG Width DECAY 24 2.047930e+00 # BR NDA ID1 ID2 ... 3.333610e-01 2 -1 2 # 0.68269999273 3.333610e-01 2 -3 4 # 0.68269999273 1.111195e-01 2 -11 12 # 0.22756495763499998 1.111195e-01 2 -13 14 # 0.22756495763499998 1.110390e-01 2 -15 16 # 0.22740009927 # # PDG Width DECAY 25 6.382339e-03 tag= 0 dyn= -1 muR=0.10000E+01 muF=0.10000E+01 tag= 0 dyn= -1 muR=0.20000E+01 muF=0.10000E+01 tag= 0 dyn= -1 muR=0.50000E+00 muF=0.10000E+01 tag= 0 dyn= -1 muR=0.10000E+01 muF=0.20000E+01 tag= 0 dyn= -1 muR=0.20000E+01 muF=0.20000E+01 tag= 0 dyn= -1 muR=0.50000E+00 muF=0.20000E+01 tag= 0 dyn= -1 muR=0.10000E+01 muF=0.50000E+00 tag= 0 dyn= -1 muR=0.20000E+01 muF=0.50000E+00 tag= 0 dyn= -1 muR=0.50000E+00 muF=0.50000E+00 tag= 4 dyn= -1 muR=0.10000E+01 muF=0.10000E+01 tag= 4 dyn= -1 muR=0.20000E+01 muF=0.10000E+01 tag= 4 dyn= -1 muR=0.50000E+00 muF=0.10000E+01 tag= 4 dyn= -1 muR=0.10000E+01 muF=0.20000E+01 tag= 4 dyn= -1 muR=0.20000E+01 muF=0.20000E+01 tag= 4 dyn= -1 muR=0.50000E+00 muF=0.20000E+01 tag= 4 dyn= -1 muR=0.10000E+01 muF=0.50000E+00 tag= 4 dyn= -1 muR=0.20000E+01 muF=0.50000E+00 tag= 4 dyn= -1 muR=0.50000E+00 muF=0.50000E+00 tag= 6 dyn= -1 muR=0.10000E+01 muF=0.10000E+01 tag= 6 dyn= -1 muR=0.20000E+01 muF=0.10000E+01 tag= 6 dyn= -1 muR=0.50000E+00 muF=0.10000E+01 tag= 6 dyn= -1 muR=0.10000E+01 muF=0.20000E+01 tag= 6 dyn= -1 muR=0.20000E+01 muF=0.20000E+01 tag= 6 dyn= -1 muR=0.50000E+00 muF=0.20000E+01 tag= 6 dyn= -1 muR=0.10000E+01 muF=0.50000E+00 tag= 6 dyn= -1 muR=0.20000E+01 muF=0.50000E+00 tag= 6 dyn= -1 muR=0.50000E+00 muF=0.50000E+00 muR H_T/2 := sum_i mT(i)/2, i=final state muF1 H_T/2 := sum_i mT(i)/2, i=final state muF2 H_T/2 := sum_i mT(i)/2, i=final state QES H_T/2 := sum_i mT(i)/2, i=final state 1 0.330000E+00 2 0.330000E+00 3 0.500000E+00 4 0.150000E+01 5 0.480000E+01 11 0.510999E-03 13 0.105658E+00 15 0.177682E+01 21 0.000000E+00 w+ b, w+ > all all decay t~ > w- b~, w- > all all #decay w+ > all all #decay w- > all all decay z > all all # running the actual code launch ]]>

2212 2212 0.65000000E+04 0.65000000E+04 -1 -1 244800 244800 -4 1 6.765177200000E+02 3.865907100000E+00 1.283803200000E+03 0

When	Who	Action	New State
2021-10-26	Olivier Mattelaer	Answer	Answered
2021-10-27	mak	Reopen	Open
2021-10-27	Olivier Mattelaer	Answer	Answered

MadGraph5_aMC@NLO

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