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. 2015 Mar 20;114(11):111801.
doi: 10.1103/PhysRevLett.114.111801. Epub 2015 Mar 18.

Enhanced Higgs boson to τ(+)τ(-) search with deep learning

P Baldi  1 , P Sadowski  1 , D Whiteson  2
Affiliations

Enhanced Higgs boson to τ(+)τ(-) search with deep learning

P Baldi et al. Phys Rev Lett. .

Abstract

The Higgs boson is thought to provide the interaction that imparts mass to the fundamental fermions, but while measurements at the Large Hadron Collider (LHC) are consistent with this hypothesis, current analysis techniques lack the statistical power to cross the traditional 5σ significance barrier without more data. Deep learning techniques have the potential to increase the statistical power of this analysis by automatically learning complex, high-level data representations. In this work, deep neural networks are used to detect the decay of the Higgs boson to a pair of tau leptons. A Bayesian optimization algorithm is used to tune the network architecture and training algorithm hyperparameters, resulting in a deep network of eight nonlinear processing layers that improves upon the performance of shallow classifiers even without the use of features specifically engineered by physicists for this application. The improvement in discovery significance is equivalent to an increase in the accumulated data set of 25%.

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