MadGraph5_aMC@NLO

Error in tW [QCD] in loop_sm-no_b_mass

Asked by user1905

Hello everyone,

I am trying to generate an tW events at QCD NLO. The syntax I am using is,

import model loop_sm-no_b_mass
define p = 21 2 4 1 3 -2 -4 -1 -3 5 -5 # pass to 5 flavors
define j = p
define p = p b b~
generate p p > t w- > mu+ vm b e- ve~ [QCD]

 The following error is being encountered (please do mind the long copy and paste),

INFO: Starting run
INFO: Compiling the code
INFO: Using built-in libraries for PDFs
INFO: MadSTR: Forcing width MDL_WW to zero inside param_card.inc
INFO: MadSTR: Forcing width MP__MDL_WW to zero inside param_card.inc
WARNING: The replacements above ensure poles cancelation, and affect all widths
   EXCEPT those which enter the resonance-treatment counterterms, which
   are taken from the param_card.
   Do NOT set these widths to zero in the param_card.
INFO: Compiling source...
INFO: ...done, continuing with P* directories
INFO: Compiling directories...
INFO: Compiling on 64 cores
INFO: Compiling P0_gb_twm_bvmemvexmup...
INFO: Compiling P0_bg_twm_bvmemvexmup...
INFO: P0_gb_twm_bvmemvexmup done.
INFO: P0_bg_twm_bvmemvexmup done.
INFO: Checking test output:
INFO: P0_gb_twm_bvmemvexmup
INFO: Result for test_ME:
INFO: Output of the failing test:
 Enter 0 to compute MC/MC(limit)
       1 to compute MC/ME(limit)
       2 to compute ME/ME(limit)
 Enter xi_i, y_ij to be used in coll/soft tests
  Enter -2 to generate them randomly
 Enter number of tests for soft and collinear limits
 SPLIT TYPE USED: T F
 A PDF is used, so alpha_s(MZ) is going to be modified
 Old value of alpha_s from param_card: 0.11900000000000002
  ****************************************

       NNPDFDriver version 1.0.3
   Grid: NNPDF23nlo_as_0119_qed_mem0.grid
  ****************************************
 New value of alpha_s from PDF nn23nlo: 0.11899999999999999
 Give FKS configuration number ("0" loops over all)

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 1
 FKS partons are: i= 8 j= 1
 with PDGs: i= 21 j= 21
WARNING: the value of maxjetflavorspecified in the run_card ( 4) is inconsistent with the number of light flavours inthe model. Hence it will be set to: 5

 Enter graph number (iconfig), '0' loops over all graphs
Using random seed offsets: 1 , 1 , 0
  with seed 32
 Ranmar initialization seeds 10730 9407
tau_min 1 1 : 0.00000E+00 -- 0.25342E+03
tau_min 2 1 : 0.00000E+00 -- 0.25342E+03
tau_min 3 1 : 0.10000E+02 0.10000E+02 0.25342E+03
tau_min 4 1 : 0.00000E+00 -- 0.25342E+03
tau_min 5 1 : 0.00000E+00 -- 0.25342E+03
tau_min 6 1 : 0.00000E+00 -- 0.25342E+03
tau_min 7 1 : 0.00000E+00 -- 0.25342E+03
tau_min 8 1 : 0.00000E+00 -- 0.25342E+03
 BORN: keeping split order 1
 counterterm S.O 1 QCD
 BORN: keeping split order 1
 counterterm S.O 2 QED
 BORN: not keeping split order 1

 REAL _1: keeping split order 1
 REAL _1_os_1: keeping split order 1
 REAL _1_os_2: keeping split order 1
 Soft tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Soft test 1 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Soft test 1 FAILED. Fraction of failures: 1.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 1 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 1 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 2
 FKS partons are: i= 8 j= 2
 with PDGs: i= 21 j= 5

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Soft test 2 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Soft test 2 FAILED. Fraction of failures: 1.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 2 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 2 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 3
 FKS partons are: i= 8 j= 3
 with PDGs: i= 21 j= 5

 Enter graph number (iconfig), '0' loops over all graphs
 In phase-space generator, the border for the mapping range is set to 2.5869250908515085 for the first PS point.

 Soft tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Soft test 3 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Soft test 3 FAILED. Fraction of failures: 1.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 3 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 3 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 4
 FKS partons are: i= 8 j= 1
 with PDGs: i= -1 j= -1

 Enter graph number (iconfig), '0' loops over all graphs

 REAL _2: keeping split order 1
 REAL _2_os_1: keeping split order 1
 REAL _2_os_2: keeping split order 1
 Soft tests done for (Born) config 1
 Failures: 0 0 0
Sum of all orders: Soft test 4 PASSED. Fraction of failures: 0.00
Split-order 2: QCD: 4; QED: 8; Soft test 4 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 4 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 4 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 5
 FKS partons are: i= 8 j= 1
 with PDGs: i= 1 j= 1

 Enter graph number (iconfig), '0' loops over all graphs

 REAL _3: keeping split order 1
 REAL _3_os_1: keeping split order 1
 REAL _3_os_2: keeping split order 1
 Soft tests done for (Born) config 1
 Failures: 0 0 0
Sum of all orders: Soft test 5 PASSED. Fraction of failures: 0.00
Split-order 2: QCD: 4; QED: 8; Soft test 5 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 5 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 5 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 6
 FKS partons are: i= 8 j= 1
 with PDGs: i= -5 j= -5

 Enter graph number (iconfig), '0' loops over all graphs

 REAL _4: keeping split order 1
 REAL _4_os_1: keeping split order 1
 REAL _4_os_2: keeping split order 1
 Soft tests done for (Born) config 1
 Failures: 0 0 0
Sum of all orders: Soft test 6 PASSED. Fraction of failures: 0.00
Split-order 2: QCD: 4; QED: 8; Soft test 6 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 6 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 6 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 7
 FKS partons are: i= 8 j= 1
 with PDGs: i= 5 j= 5

 Enter graph number (iconfig), '0' loops over all graphs

 REAL _5: keeping split order 1
 REAL _5_os_1: keeping split order 1
 REAL _5_os_2: keeping split order 1
 Soft tests done for (Born) config 1
 Failures: 0 0 0
Sum of all orders: Soft test 7 PASSED. Fraction of failures: 0.00
Split-order 2: QCD: 4; QED: 8; Soft test 7 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 7 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 7 FAILED. Fraction of failures: 1.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 8
 FKS partons are: i= 8 j= 2
 with PDGs: i= -5 j= 21

 Enter graph number (iconfig), '0' loops over all graphs

 REAL _6: keeping split order 1
 REAL _6_os_1: keeping split order 1
 REAL _6_os_2: keeping split order 1
 Soft tests done for (Born) config 1
 Failures: 0 0 0
Sum of all orders: Soft test 8 PASSED. Fraction of failures: 0.00
Split-order 2: QCD: 4; QED: 8; Soft test 8 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 100 0 100
Sum of all orders: Collinear test 8 FAILED. Fraction of failures: 1.00
Split-order 2: QCD: 4; QED: 8; Collinear test 8 FAILED. Fraction of failures: 1.00

Any help or syggestion is highly appreciated.

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Did you try to do
generate p p > t w- [QCD]
and their decay in MadSpin?

This sounds closer to what you want than the syntax that you used.

Cheers,

Olivier

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