error while generating three body single production of leptogluons

Hi,

This means that the CKKWL clustering algorithm fails to compute the scale of the process.
So the solution is simple: "do not use" the CKKWL clustering algorithm to determine the scale of the events.
You can either pass to a fix scale computation or to any other dynamical scale choice (as long as you do not set dynamical_scale_choice to -1, which is CKKWL clustering algorithm)

Cheers,

Olivier

> On 22 Dec 2023, at 05:15, Arijit Das <email address hidden> wrote:
>
> New question #708769 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/708769
>
> I have written an .fr file for Leptogluons and imported the UFO files to Madgraph. While I was trying to generate the process
>
> generate p p > lg1 ex jb $lg1~ @1
> add process p p > lg1~ ex jb $lg1 @2 (lg1 is the leptogluon that couples with electrons, ex = e+ e- and jb = j(light jet), b, b ~)
>
> I am getting the following error:
>
> Error when reading /home/arijit/Research/Packages/MG5_aMC_v3_4_2/Rough/PROC_Leptogluon_UFO_0/SubProcesses/P1_gg_lg1lg/G2/results.dat
> Command "generate_events run_01" interrupted with error:
> Exception : Reported error: End code 4.0
> Full associated log:
> Process in group number 1
> A PDF is used, so alpha_s(MZ) is going to be modified
> Old value of alpha_s from param_card: 0.13000000000000003
> ****************************************
>
> NNPDFDriver version 1.0.3
> Grid: NNPDF23_lo_as_0130_qed_mem0.grid
> ****************************************
> New value of alpha_s from PDF nn23lo1: 0.13000000000000000
> Define smin to 1000000.0000000000
> *****************************************************
> * MadGraph/MadEvent *
> * -------------------------------- *
> * http://madgraph.hep.uiuc.edu *
> * http://madgraph.phys.ucl.ac.be *
> * http://madgraph.roma2.infn.it *
> * -------------------------------- *
> * *
> * PARAMETER AND COUPLING VALUES *
> * *
> *****************************************************
>
> External Params
> ---------------------------------
>
> mdl_nL = 1.0000000000000000
> mdl_nR = 0.0000000000000000
> mdl_lam = 1000.0000000000000
> aEWM1 = 127.90000000000001
> mdl_Gf = 1.1663700000000000E-005
> aS = 0.13000000000000003
> mdl_ymb = 4.7000000000000002
> mdl_ymt = 172.00000000000000
> mdl_ymtau = 1.7769999999999999
> mdl_MZ = 91.187600000000003
> mdl_MTA = 1.7769999999999999
> mdl_MT = 172.00000000000000
> mdl_MB = 4.7000000000000002
> mdl_MH = 125.00000000000000
> mdl_Mlg1 = 1000.0000000000000
> mdl_Mlg2 = 1000.0000000000000
> mdl_Mlg3 = 1000.0000000000000
> mdl_WZ = 2.4952000000000001
> mdl_WW = 2.0850000000000000
> mdl_WT = 1.5083359999999999
> mdl_WH = 5.7530880000000000E-003
> mdl_Wlg1 = 23.553000000000001
> mdl_Wlg2 = 23.553000000000001
> mdl_Wlg3 = 23.553000000000001
> Internal Params
> ---------------------------------
>
> mdl_MZ__exp__2 = 8315.1783937600012
> mdl_MZ__exp__4 = 69142191.720053151
> mdl_sqrt__2 = 1.4142135623730951
> mdl_MH__exp__2 = 15625.000000000000
> mdl_complexi = (0.0000000000000000,1.0000000000000000)
> mdl_aEW = 7.8186082877247844E-003
> mdl_MW = 79.824359746197842
> mdl_sqrt__aEW = 8.8422894590285753E-002
> mdl_ee = 0.31345100004952897
> mdl_MW__exp__2 = 6371.9284088904105
> mdl_sw2 = 0.23369913342182447
> mdl_cw = 0.87538612427783857
> mdl_sqrt__sw2 = 0.48342438232036300
> mdl_sw = 0.48342438232036300
> mdl_g1 = 0.35807170271074895
> mdl_gw = 0.64839716719502682
> mdl_vev = 246.22056907348590
> mdl_vev__exp__2 = 60624.568634871241
> mdl_lam__2 = 0.12886689630821144
> mdl_yb = 2.6995322804122722E-002
> mdl_yt = 0.98791394091683138
> mdl_ytau = 1.0206529494239589E-002
> mdl_muH = 88.388347648318444
> mdl_ee__exp__2 = 9.8251529432049817E-002
> mdl_sw__exp__2 = 0.23369913342182450
> mdl_cw__exp__2 = 0.76630086657817542
> Internal Params evaluated point by point
> ----------------------------------------
>
> mdl_sqrt__aS = 0.36055512754639896
> mdl_G__exp__2 = 1.6336281798666927
> Couplings of Leptogluon_UFO
> ---------------------------------
>
> GC_6 = -0.12781E+01 0.00000E+00
> GC_7 = 0.00000E+00 0.12781E+01
> GC_8 = 0.00000E+00 0.16336E+01
> GC_10 = 0.00000E+00 0.63907E-03
> GC_11 = -0.81681E-03 0.00000E+00
> GC_12 = 0.00000E+00 0.00000E+00
> GC_13 = -0.00000E+00 0.00000E+00
>
> Collider parameters:
> --------------------
>
> Running at P P machine @ 13000.000000000000 GeV
> PDF set = nn23lo1
> alpha_s(Mz)= 0.1300 running at 2 loops.
> alpha_s(Mz)= 0.1300 running at 2 loops.
> Renormalization scale set on event-by-event basis
> Factorization scale set on event-by-event basis
>
>
> getting user params
> Enter number of events and max and min iterations:
> Number of events and iterations 1000 5 3
> Enter desired fractional accuracy:
> Desired fractional accuracy: 0.10000000000000001
> Enter 0 for fixed, 2 for adjustable grid:
> Suppress amplitude (0 no, 1 yes)?
> Using suppressed amplitude.
> Exact helicity sum (0 yes, n = number/event)?
> Explicitly summing over helicities
> Enter Configuration Number:
> Running Configuration Number: 2
> Not subdividing B.W.
> Attempting mappinvarients 1 5
> Determine nb_t
> T-channel found: 0
> Completed mapping 5
> about to integrate 7 1000 5 3 7 1
> Using non-zero grid deformation.
> 7 dimensions 1000 events 7 invarients 5 iterations 1 config(s), (0.99)
> Using h-tuple random number sequence.
> Error opening grid
> Using Uniform Grid! 20
> Using uniform alpha 1.0000000000000000
> Grid defined OK
> Masses: 0.000E+00 0.000E+00 0.100E+04 0.000E+00 0.000E+00
> Set CM energy to 13000.00
> Mapping Graph 2 to config 2
> Determine nb_t
> T-channel found: 0
> Setting grid 1 0.59172E-02 1
> Setting grid 2 0.59172E-02 1
> Transforming s_hat 1/s 6 6.2775147928994090E-003 1000000.0000000000 168999999.99999997
> Using random seed offsets 2 : 1
> with seed 30
> Ranmar initialization seeds 8293 9405
>
> ********************************************
> * You are using the DiscreteSampler module *
> * part of the MG5_aMC framework *
> * Author: Valentin Hirschi *
> ********************************************
>
> Particle 3 4 5
> Et > 0.0 10.0 20.0
> E > 0.0 0.0 0.0
> Eta < -1.0 2.5 5.0
> xqcut: 0.0 0.0 0.0
> d R # 3 > -0.0 0.0 0.0
> d R # 4 > -0.0 -0.0 0.4
> s min # 3> 0.0******** 0.0
> s min # 4> 0.0 0.0 0.0
> xqcutij # 3> 0.0 0.0 0.0
> xqcutij # 4> 0.0 0.0 0.0
> No cut BW -1 1
> alpha_s for scale 587.62478399230974 is 9.9314184041253903E-002
> Error: Failed despite same graph: 2
> Have jets (>0) 0 0 0 0 1
> Should be
> STOP 4
>
> ls status:
> input_app.txt
> log.txt
> run1_app.log
>
> Please report this bug on https://bugs.launchpad.net/mg5amcnlo
> More information is found in '/home/arijit/Research/Packages/MG5_aMC_v3_4_2/Rough/PROC_Leptogluon_UFO_0/run_01_tag_1_debug.log'.
> Please attach this file to your report.
>
> Why is this error possibly coming up ?
>
> --
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