# ML4Jets2021

Jul 6 – 8, 2021
Europe/Zurich timezone

## High-dimensional Anomaly Detection with Radiative Return in e+e- Collisions

Jul 6, 2021, 2:00 PM
20m

### Speaker

Julia Lynne Gonski (Columbia University (US))

### Description

Experiments at a future $e^{+}e^{-}$ collider will be able to search for new particles with masses below the nominal centre-of-mass energy by analyzing collisions with initial-state radiation (radiative return). We show that machine learning methods based on semisupervised and weakly supervised learning can achieve model-independent sensitivity to the production of new particles in radiative return events. In addition to a first application of these methods in $e^{+}e^{-}$ collisions, our study is the first to combine weak supervision with high-dimensional information by deploying a deep sets neural network architecture. We have also investigated some of the experimental aspects of anomaly detection in radiative return events and discuss these in the context of future detector design.

Affiliation Columbia University, University of California Berkeley, Lawrence Berkeley National Laboratory, Laboratory of Instrumentation and Experimental Particle Physics (Lisbon)

### Primary authors

Julia Lynne Gonski (Columbia University (US)) Jerry Lai (University of California, Berkeley) Ben Nachman (Lawrence Berkeley National Lab. (US)) Ines Ochoa (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)

### Presentation materials

 0706_jgonski_ml4jets.pdf Julia_Gonski.mp4