Introduction

Excited electron analysis using the 2012 dataset, where the excited electron is produced with an associated standard model electron through a contact interaction and then decays, again through a contact interaction, into a standard model electron and two quarks.

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It is being performed parallel to the 2012 leptoquark analysis.

Montecarlo Validation (Two electrons plus two jets)

This is MC validation for excited electron production (with an associated standard model electron) decaying into a final state of 2 electrons and 2 jets through a contact interaction.

CompHEP and Pythia8 MC12

This is done in release 17.2.8.3. Comphep version 4.5.1. Pythia8 version 8.170.

Filter efficiency and error log from Generate_trf.py

//e* plus:
*-------  PYTHIA Error and Warning Messages Statistics  ----------------------------------------------------------*
 |                                                                                                                 |
 |  times   message                                                                                                |
 |                                                                                                                 |
 |     20   Abort from Pythia::next: reached end of Les Houches Events File                                        |
 |      2   Error in BeamRemnants::setKinematics: kinematics construction failed                                   |
 |     33   Error in Pythia::next: hadronLevel failed; try again                                                   |
 |     18   Error in StringFragmentation::fragment: stuck in joining                                               |
 |     15   Error in StringFragmentation::fragmentToJunction: caught in junction flavour loop                      |
 |      1   Warning in MultipartonInteractions::init: maximum increased                                            |
 |      3   Warning in ParticleDataEntry::initBWmass: switching off width                                          |
 |      7   Warning in SpaceShower::pT2nextQCD: small daughter PDF                                                 |
 |   1547   Warning in SpaceShower::pT2nextQCD: weight above unity                                                 |
 |     17   Warning in StringFragmentation::fragmentToJunction: bad convergence junction rest frame                |
 |      4   Warning in TauDecays::decay: unknown tau production, assuming unpolarized and uncorrelated             |
 |                                                                                                                 |
 *-------  End PYTHIA Error and Warning Messages Statistics  ------------------------------------------------------*
MetaData: cross-section (nb)= 4.282e-07
MetaData: generator= Pythia 8.165
TestHepMC            INFO Events passed = 5000, Events Failed = 0
TestHepMC            INFO Efficiency = 100%

//e* minus:
 *-------  PYTHIA Error and Warning Messages Statistics  ----------------------------------------------------------*
 |                                                                                                                 |
 |  times   message                                                                                                |
 |                                                                                                                 |
 |     23   Abort from Pythia::next: reached end of Les Houches Events File                                        |
 |      3   Error in BeamRemnants::setKinematics: kinematics construction failed                                   |
 |     23   Error in Pythia::next: hadronLevel failed; try again                                                   |
 |     14   Error in StringFragmentation::fragment: stuck in joining                                               |
 |      9   Error in StringFragmentation::fragmentToJunction: caught in junction flavour loop                      |
 |      1   Warning in MultipartonInteractions::init: maximum increased                                            |
 |      3   Warning in ParticleDataEntry::initBWmass: switching off width                                          |
 |     18   Warning in SpaceShower::pT2nextQCD: small daughter PDF                                                 |
 |   1495   Warning in SpaceShower::pT2nextQCD: weight above unity                                                 |
 |     21   Warning in StringFragmentation::fragmentToJunction: bad convergence junction rest frame                |
 |      1   Warning in TauDecays::decay: unknown tau production, assuming unpolarized and uncorrelated             |
 |                                                                                                                 |
 *-------  End PYTHIA Error and Warning Messages Statistics  ------------------------------------------------------*
MetaData: cross-section (nb)= 4.307e-07
MetaData: generator= Pythia 8.165
TestHepMC            INFO Events passed = 5000, Events Failed = 0
TestHepMC            INFO Efficiency = 100%
CountHepMC           INFO Events passing all checks and written = 5000

Validation Plots, JO

note: All plots and cross-sections are with the compositnes scale set to Lambda = 5 TeV. To determine the mass reach one must look at the cross section when Lambda is equal to the mass of the excited electron.