Full Event Particle-Level Unfolding with Variable-Length Latent Variational Diffusion

• URL: http://arxiv.org/abs/2404.14332v2
• Date: Wed, 30 Oct 2024 14:39:15 GMT
• Title: Full Event Particle-Level Unfolding with Variable-Length Latent Variational Diffusion
• Authors: Alexander Shmakov, Kevin Greif, Michael James Fenton, Aishik Ghosh, Pierre Baldi, Daniel Whiteson,
• Abstract summary: generative machine learning models have shown promise for performing unbinned unfolding in a high number of dimensions. A novel modification to the variational latent diffusion model (VLD) approach to generative unfolding is presented. The performance of this method is evaluated in the context of semi-leptonic top quark pair production at the Large Hadron Collider.
• Score: 44.6263403467016
• License:
• Abstract: The measurements performed by particle physics experiments must account for the imperfect response of the detectors used to observe the interactions. One approach, unfolding, statistically adjusts the experimental data for detector effects. Recently, generative machine learning models have shown promise for performing unbinned unfolding in a high number of dimensions. However, all current generative approaches are limited to unfolding a fixed set of observables, making them unable to perform full-event unfolding in the variable dimensional environment of collider data. A novel modification to the variational latent diffusion model (VLD) approach to generative unfolding is presented, which allows for unfolding of high- and variable-dimensional feature spaces. The performance of this method is evaluated in the context of semi-leptonic top quark pair production at the Large Hadron Collider.

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