Could Sherpa generate NLO vbs same-sign WW events
Dear Sherpa experts,
We are trying to generate events with Sherpa v2.2.15 for vbs same-sign WW process. We wonder if Sherpa can do the NLO QCD or even NLO EW event generation of this process.
We created an NLO Run.dat by following the LO ssWW+0~1Jet Run.dat. Not sure if this Run.dat is written correctly. It would be great if you could take a look at it.
We've tried to run this NLO Run.dat but didn't manage to generate events. There might be some issues. Here is the full log link. We are not sure if some of this information is normal. For example:
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We saw the following information. Then we ran
./makelibs
.Exit info before running makelibs
******************************************* * C O L L I E R * * * * Complex One-Loop Library * * In Extended Regularizations * * * * by A.Denner, S.Dittmaier, L.Hofer * * * * version 1.2.4 * * * ******************************************* [OpenLoops] register_process: process -1 -1 -> 12 12 -11 -11 -2 -2 @ tree=6,2 loop=6,3 (EW,QCD) not found! Sherpa: Single_Virtual_Correction::SelectLoopProcess throws not implemented: Couldn't find virtual ME for this process. Exception_Handler::GenerateStackTrace(..): Generating stack trace { 0x2ad682b5ab00 in 'ATOOLS::Terminate()' (Exception_Handler.C:140) 0x2ad683782555 in '__libc_start_main' (??:?) } Exception_Handler::Terminate(): Pre-crash status saved to '/gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Status__Fri_Mar_15_02-20-44_2024'. ------------------------------------------------------------------------ Please cite the publications listed in 'Sherpa_References.tex'. Extract the bibtex list by running 'get_bibtex Sherpa_References.tex' or email the file to 'slaclib2@slac.stanford.edu', subject 'generate'. ------------------------------------------------------------------------ Exception_Handler::Exit: Exiting Sherpa with code (1) Thanks for using LHAPDF 6.4.0. Please make sure to cite the paper: Eur.Phys.J. C75 (2015) 3, 132 (http://arxiv.org/abs/1412.7420)
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Once compiled, we re-invoked Sherpa for further library/cross-part calculations, and "OpenLoops" seemed to be stuck forever in finding the correct library
OpenLoops tried to find correct library
Initialising OpenLoops generator from /cvmfs/cms.cern.ch/slc7_amd64_gcc10/external/openloops/2.1.2-9cbe20c85dea79914e58b8897345044f #################################################################### # ___ ___ ____ _ _ __ __ ___ __ ___ # # / \ |__| |__ |\ | | / \ / \ |__| /__ __/ # # \___/ | |___ | \| |__ \__/ \__/ | __/ /__ # # You are using OpenLoops 2 to evaluate loop amplitudes # # F. Buccioni, J.-N. Lang, J. Lindert, P. Maierhoefer, # # S. Pozzorini, M. Zoller, H. Zhang # # Eur.Phys.J. C79 (2019) no.10, 866 # # arXiv:1907.13071 # #################################################################### Matrix_Element_Handler::BuildProcesses(): Looking for processes ................................................................................................................................................................................................IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI).col not available. IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI)_S0_1.col not available. IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI)_S0_6.col not available. IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI)_S0_7.col not available. IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI)_S1_6.col not available. IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI)_S1_7.col not available. IO_Handler::SetFileNameRO: /gridgroup/cms/jxiao/genval/sherpa/ssww/CMSSW_12_4_18/src/MY/PROJECT/test2/SHERPATMP_ssWW_NLO/TMP/Process/Amegic/P2_6/2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI)_S6_7.col not available. Single_LOProcess::Tests for 2_6__db__db__ve__ve__e+__e+__ub__ub__QCD(BVI) Prepare gauge test and init helicity amplitudes. This may take some time. In String_Handler::Complete : this may take some time.... Single_LOProcess::CheckLibraries : Looking for a suitable library. This may take some time. ..............
We would appreciate any insight you can provide on whether the process of NLO vbs same-sign WW can be accomplished.
Thanks in advance, Jie