ECCE Physics

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Editorial page

The link above provides details on the ECCE reviewing process

Physics Benchmarks Team

The Physics Benchmarks Team is organized in 7 different working groups (WGs):

This structure was inspired in the Yellow Report organization, with the addition of a dedicated group on Simulations and on Electroweak and BSM.

Physics Team meeting:

The WGs are organized by physics processes, and not by physics topics. The following table, extracted from the YR, shows the relationship between the science topics and the categories of measurements.


Open tasks in the Physics Benchmarks Team

A list of currently available open tasks for each of the working groups is available here: Open Tasks

If you're interested in contributing to the Physics Team of ECCE and/or have people in your group that would, please check the above link to find a suitable project.

Beam energies

The feasible ion energies at EIC (per nucleon) are the following:

p 41 GeV Between 100 and 275 GeV
d 41 GeV/u Between 100 on 137 GeV/u
3He 41 GeV/u Between 100 and 166 GeV/u
4He 41 GeV/u Between 100 and 137 GeV/u
Au 41 GeV/u Between 100 and 110 GeV/u

The maximum energy is given by the maximum beam rigidity, that must not exceed the corresponding value for protons at 275 GeV. The maximum energy is therefore 275×Z/A. 3He is special; with 2 protons and only one neutron its maximum energy can be higher.

The minimum energy is given by the fact that the Lorentz energy factor γ=E/m must be within the range of the one for protons (so that electron-ion collisions can be synchronized). The possible γ are 43.7 (for protons of 41 GeV) and from 106.6 to 293.1 for protons between 100 and 275 GeV (see section 3.3.2 of the EIC CDR).

Electron energies range between 5 and 18 GeV.

Given the above, we suggest the following energy combinations to be used for simulations (in order of priority):

1 High energy setting: 18 GeV on 275×Z/A GeV/u (except 18 GeV x 166 GeV/u for 3He)
2 Low energy setting: 5 GeV on 41 GeV/u
3 Intermediate energy setting: 10 GeV on 100 GeV/u

Integrated luminosity

Notice that luminosity at EIC is always quoted per nucleon. The recommended integrated luminosity for plots is 10 fb-1 (expected integrated luminosity in one year of running). When simulating ion beams, this value should be divided by the number of nucleons (A).

Event generators

The following sections list the events generators used during the YR, with their steering cards and MC samples (when available).

Please contact the Physics Benchmarks Team conveners for general questions or requests

Inclusive reactions

[Information on this section taken from here]

For inclusive reactions, two main event generators were used during the Yellow Report exercise:

  • Pythia 6 (Documentation, Code), for inclusive neutral current electron-proton scattering
    • Input Cards and Plotting Macro: 5+41 card, 5+100 card, 10+100 card, 18+275 card, Macro
    • EIC-smear ROOT Files: '/gpfs02/eic/baraks/pythia/outfiles/yellow_report/' on BNL RACF machines (generator level: ep_*_newtune_*.root, after eic-smear v0.1: ep_*_newtune_*_matrixsmear.root)
    • Q2 > 0.5 GeV2
    • Contact : Barak Schmookler
  • BeAGLE (Documentation, Code), for inclusive neutral current electron-nucleus scattering
    • Species and energies used: e+Au 5x41, 10x110, 18x110 GeV
    • Generator used: BeAGLE ( BeAGLE Normalization )
    • Input Cards: 18x110 (Others energies similar)
    • ROOT Files: '/gpfs02/eic/baraks/BeAGLE/outForPythiaMode/rootfiles/' on BNL RACF machines
    • Q2 > 0.5 GeV2
    • Contact : Barak Schmookler and Dmitriy Kim
  • Djangoh (Documentation, Code), for inclusive neutral-current ep scattering and charge current electron scattering
    • Input cards for neutral-current ep scattering 5x41, 5x100, 10x100, 18x275
    • ROOT files: '/eic/data/baraks/dis-reconstruction/djangoh/outfiles/yellow/' on BNL RACF machines (generator level files, not smeared)
    • Contact : Barak Schmookler

Semi-inclusive reactions

  • Pythia 6 (Documentation, Code)
    • Input cards and output files from YR (by R. Seidl) at: /gpfs/mnt/gpfs02/eic/DATA/YR_SIDIS/ (README file included)
    • Input card for gluon Sivers at 18 GeV x 275 GeV (by L. Zheng)
  • Pythia 8 + DIRE (Code)
  • elSpectro (Code)

Jets & HQ

Exclusive reactions

Exclusive Reactions Working Group Page

  • DVCS
    • Generator: Milou / Milou3D
    • MC samples: /gpfs02/eic/DATA/MILOU/newfiles/NEWMILOU/*.out
    • Contact: Salvatore Fazio
  • Diffractive dijets
    • Generator: Pythia8
    • Contact: Latiful Kabir
  • Exclusive J/Psi and Phi Production
    • Generators: Sartre and eSTARlight, ???
    • Working Wiki Page

Diffractive & Tagging

Yellow Report Diffractive & Tagging Page

Yellow Report Exclusive Reaction Page

For full information on ECCE Diffractive & Tagging Workgroup, please visit: Diffractive and Tagging Physics Working Group Page

  • u-channel π0 Production
    • Contact: Wenliang (Bill) Li (
    • Generator: DEMPgen
    • MC samples:
      • 5 on 100: 1M test data
      • Fun4all instruction: passing through EIC Smear first. Interface script is under work.
    • Analysis plugin:
  • Pion and Kaon Form Factors via DEMP
    • YR Contact: Garth Huber and Stephen Kay
    • Generator: DEMPgen
    • MC samples:
    • Analysis plugin:

It is not recommended to try and install these generators. They are installed on BNL machines, and they can be accessed through the Singularity container. For more information on this: (You may not even need to run these generators; the ROOT files from the Yellow Report might already have what you need)

Fun4all Simulation and Other Important Common Resources