Anomalous Higgs boson couplings in weak boson fusion production at NNLO in QCD

(2022)

Authors:

Konstantin Asteriadis, Fabrizio Caola, Kirill Melnikov, Raoul Röntsch

Leveraging universality of jet taggers through transfer learning

The European Physical Journal C volume 82, Article number: 564 (2022)

Authors:

Frédéric A. Dreyer, Radosław Grabarczyk, Pier Francesco Monni

Abstract:

A significant challenge in the tagging of boosted objects via machine-learning technology is the prohibitive computational cost associated with training sophisticated models. Nevertheless, the universality of QCD suggests that a large amount of the information learnt in the training is common to different physical signals and experimental setups. In this article, we explore the use of transfer learning techniques to develop fast and data-efficient jet taggers that leverage such universality. We consider the graph neural networks LundNet and ParticleNet, and introduce two prescriptions to transfer an existing tagger into a new signal based either on fine-tuning all the weights of a model or alternatively on freezing a fraction of them. In the case of W-boson and top-quark tagging, we find that one can obtain reliable taggers using an order of magnitude less data with a corresponding speed-up of the training process. Moreover, while keeping the size of the training data set fixed, we observe a speed-up of the training by up to a factor of three. This offers a promising avenue to facilitate the use of such tools in collider physics experiments.

Axion Couplings in Grand Unified Theories

(2022)

Authors:

Prateek Agrawal, Michael Nee, Mario Reig

Mixed QCD-electroweak corrections to dilepton production at the LHC in the high invariant mass region

Journal of High Energy Physics Springer Nature 2022:6 (2022) 22

Authors:

Federico Buccioni, Fabrizio Caola, Herschel A Chawdhry, Federica Devoto, Matthias Heller, Andreas von Manteuffel, Kirill Melnikov, Raoul Röntsch, Chiara Signorile-Signorile

Searching for High-Energy Neutrino Emission from Galaxy Clusters with IceCube

(2022)

Authors:

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