A Deep Neural Network for Simultaneous Estimation of b Jet Energy and Resolution
Abstract
We describe a method to obtain point and dispersion estimates for the energies of jets arising from b quarks produced in proton-proton collisions at an energy of $\sqrt{s} =$ 13 TeV at the CERN LHC. The algorithm is trained on a large simulated sample of b jets and validated on data recorded by the CMS detector in 2017 corresponding to an integrated luminosity of 41 fb$^{-1}$. A multivariate regression algorithm based on a deep feed-forward neural network employs jet composition and shape information, and the properties of reconstructed secondary vertices associated with the jet. The results of the algorithm are used to improve the sensitivity of analyses that make use of b jets in the final state, such as the observation of Higgs boson decay to $\mathrm{b\bar{b}}$.
- Publication:
-
Computing and Software for Big Science
- Pub Date:
- 2020
- DOI:
- 10.1007/s41781-020-00041-z
- arXiv:
- arXiv:1912.06046
- Bibcode:
- 2020CSBS....4...10S
- Keywords:
-
- Physics - Data Analysis;
- Statistics and Probability;
- High Energy Physics - Experiment
- E-Print:
- Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-18-027 (CMS Public Pages)