• DOI:10.1007/JHEP12(2018)031
• Corpus ID: 119027630

Computing N -subjettiness for boosted jets

@article{Napoletano2018ComputingN,
  title={Computing N -subjettiness for boosted jets},
  author={Davide Napoletano and Gr{\'e}gory Soyez},
  journal={Journal of High Energy Physics},
  year={2018},
  volume={2018},
  pages={1-35}
}

• D. Napoletano, G. Soyez
• Published 12 September 2018
• Physics
• Journal of High Energy Physics

A bstractJet substructure tools have proven useful in a number of high-energy particle-physics studies. A particular case is the discrimination, or tagging, between a boosted jet originated from an electroweak boson (signal), and a standard QCD parton (background). A common way to achieve this is to cut on a measure of the radiation inside the jet, i.e. a jet shape. Over the last few years, analytic calculations of jet substructure have allowed for a deeper understanding of these tools and for the development of more efficient ones. However, analytic calculations are often limited to the region where the jet shape is small. In this paper we introduce a new approach in perturbative QCD to compute jet shapes for a generic boosted jets, waiving the above limitation. We focus on an example common in the substructure literature: the jet mass distribution after a cut on the N -subjettiness τ21 ratio, extending previous works to the region relevant for phenomenology. We compare our analytic predictions to Monte Carlo simulations for both plain and SoftDrop-groomed jets. We use our results to construct analytically a decorrelated tagger.