Evaluation and Optimisation of a Generative-Classification Hybrid Variational Autoencoder in the Search for Resonances at the LHC

The Standard Model (SM) of particle physics was completed by the discovery of the Higgs boson in 2012 by the ATLAS and CMS collaborations. However, the SM is not able to explain a number of phenomena and anomalies in the data. These discrepancies to the SM motivate the search for new bosons. In this...

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Bibliographic Details
Published in:Journal of physics. Conference series Vol. 2586; no. 1; pp. 12160 - 12162
Main Authors: Stevenson, Finn, Lieberman, Benjamin, Swain, Abhaya, Mellado, Bruce
Format: Journal Article
Language:English
Published: Bristol IOP Publishing 01.09.2023
Subjects:
Anomalies
Bosons
Classification
Higgs bosons
Optimization
Particle physics
Physics
Searching
Standard model (particle physics)
ISSN:1742-6588, 1742-6596
Online Access:Get full text
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Summary:The Standard Model (SM) of particle physics was completed by the discovery of the Higgs boson in 2012 by the ATLAS and CMS collaborations. However, the SM is not able to explain a number of phenomena and anomalies in the data. These discrepancies to the SM motivate the search for new bosons. In this paper, searches for new bosons are completed by looking for Zgamma resonances in Z γ ( pp → H → Z γ ) fast simulation events. This research makes use of a Variational Autoencoder (VAE), in the search for new bosons. The functionality of a VAE to be trained as both a generative model and a classification model makes the architecture an attractive option for aiding the search. The VAE is used as a generative model to increase the amount of Z γ fast simulation Monte Carlo data whilst simultaneously being used to classify samples containing injected signals that differ from the Monte Carlo data on which the model was trained. This work concentrates on the final evaluation and optimisation of the VAE for the generative task.
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ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2586/1/012160