Herwig7.1 Quark and Gluon Jets

A dataset of quark and gluon jets generated with Herwig 7.1, analogous to this dataset of Pythia jets. Generation parameters are listed below:

• Herwig 7.1.4, \(\sqrt{s}=14\,\text{TeV} \)
• Quarks from \(gq\to Z(\to\nu\bar\nu)q\), gluons from \(q\bar q\to Z(\to\nu\bar\nu)g\)
• FastJet 3.3.0, anti-ki jets with R=0.4
• \(p_T^\text{jet}\in[500,550]\,\text{GeV},\,|y^\text{jet} |<1.7\)

Each file is in compressed NumPy format and can be accessed in python using np.load. There are two arrays in each file

• X: (100000,M,4), exactly 50k quark and 50k gluon jets, randomly sorted, where M is the max multiplicity of the jets in that file (other jets have been padded with zero-particles), and the features of each particle are its pt, rapidity, azimuthal angle, and pdgid.
• y: (100000,), an array of labels for the jets where gluon is 0 and quark is 1.

If you use this dataset, please cite this Zenodo record and, optionally, the Pythia dataset which inspired it. The format of the data is identical to that of the Pythia dataset and is additionally described as part of the EnergyFlow documentation.