Phenomenology at the large hadron collider with deep learning: the case of vector-like quarks decaying to light jets

Felipe F. Freitas; João Gonçalves; António P. Morais; Roman Pasechnik

doi:10.1140/epjc/s10052-022-10799-8

2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2022) 82: 826
https://doi.org/10.1140/epjc/s10052-022-10799-8

Regular Article - Theoretical Physics

Phenomenology at the large hadron collider with deep learning: the case of vector-like quarks decaying to light jets

Felipe F. Freitas¹, João Gonçalves¹^b, António P. Morais¹ and Roman Pasechnik²

¹ Departamento de Física da Universidade de Aveiro and Centre for Research and Development in Mathematics and Applications (CIDMA), Campus de Santiago, 3810-183, Aveiro, Portugal
² Department of Astronomy and Theoretical Physics, Lund University, Sölvegatan 14A, 223-62, Lund, Sweden

^b jpedropino@ua.pt

Received: 5 May 2022
Accepted: 9 September 2022
Published online: 18 September 2022

Abstract

In this work, we continue our exploration of TeV-scale vector-like fermion signatures inspired by a Grand Unification scenario based on the trinification gauge group. A particular focus is given to pair-production topologies of vector-like quarks (VLQs) at the LHC, in a multi-jet plus a charged lepton and a missing energy signature. We employ Deep Learning methods and techniques based in evolutive algorithms that optimize hyper-parameters in the neural network construction, whose objective is to maximise the Asimov estimate for distinct VLQ masses. In this article, we consider the implications of an innovative approach by simultaneously combining detector images (also known as jet images) and tabular data containing kinematic information from the final states. With this technique we are able to exclude VLQs, that are specific for the considered model, up to a mass of 800 GeV in both the high-luminosity the Run-III phases of the LHC programme.

© The Author(s) 2022

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