Simulation of the pMSSM Simulation of the pMSSM The pMSSM What is - PowerPoint PPT Presentation

Simulation of the pMSSM Simulation of the pMSSM ● The pMSSM ● What is needed? ● Procedure ● Outlook 1 LHEP, Benjamin Gerber 01.03.2013

The pMSSM The pMSSM ● pMSSM: phenomenological Minimal Supersymmetric Model ● Due to some constraints “just” 19 free parameters, compared with the more than 100 of the unconstrained MSSM. ● [For completeness:] ● Constraints: ● R-parity is conserved (→ LSP, Neutralino or Gravitino, is stable). ● No new CP-violation source (all phases of soft-SUSY breaking potential are zero, just CKM-matrix leads to CP-violation). ● No flavour changing neutral currents. ● First and second generation sleptons and squarks with same quantum- numbers taken to be degenerate → have negligible Yukawa couplings. 2 LHEP, Benjamin Gerber 01.03.2013

What is needed? What is needed? ● My set of programs: – SUSPECT2: to generate the pMSSM mass-spectrum – SUSY-HIT: to include the branching ratios – SuperIso: to validate the created models – Herwig++(/Pythia): MC-simulation of pp-collision – Delphes: MC-simulation of the ATLAS detector – [HepMC: package for eventrecording ] – [ThePeg: toolkit for event generation ] 3 LHEP, Benjamin Gerber 01.03.2013

Procedure Procedure ● Schematic for one model: Feed in the 19 parameters Suspect2: of the pMSSM. Creates mass spectrum in pMSSM-model.slha SUSY-HIT: Includes BR's and matrix-elements into pMSSM-model.slha Herwig++(/Pythia): SuperIso: Delphes: Does a MC-simulation out of Checks upon few Simulates the ATLAS-detector the pMSSM-model.slha file different observables if and creates a *.root file out and creates a *.hepmc file the pMSSM-model.slha of the *.hepmc file. with all the decay-products. is valid or not. 4 LHEP, Benjamin Gerber 01.03.2013

Procedure Procedure ● Schematic for one model: To do: Suspect2: - Write Python codes to: Creates mass spectrum ● create arbitrary much models and check them on in pMSSM-model.slha validity due to the Higgs mass (Suspect2 and SUSY-Hit) ● check validity due to other parameters (SuperIso) ● ceate a hepmc-file for each valid pMSSM model SUSY-HIT: Includes BR's and (Herwig++/Pythia) to feed it to Delphes to create root matrix-elements into files. pMSSM-model.slha [- Write a CINT code for some analysis.] Herwig++(/Pythia): SuperIso: Delphes: Does a MC-simulation out of Checks upon few Simulates the ATLAS-detector the pMSSM-model.slha file different observables if and creates a *.root file out and creates a *.hepmc file the pMSSM-model.slha of the *.hepmc file. with all the decay-products. is valid or not. 5 LHEP, Benjamin Gerber 01.03.2013

Outlook Outlook ● Search&implementation of the most recent constraints ● Simulation of “few 1000” events for each of the “few 1000” valid pMSSM-models with pp collisions of 13 TeV ● Analysis ___________________________________________ |____________________|______________________| 6 LHEP, Benjamin Gerber 01.03.2013

To be continued... To be continued... 7 LHEP, Benjamin Gerber 01.03.2013