# 2021 Meeting of the Division of Particles and Fields of the American Physical Society (DPF21)

Jul 12 – 14, 2021
Zoom
US/Eastern timezone

## Active Learning for Exclusion level set estimation with the ATLAS experiment

Jul 12, 2021, 3:30 PM
15m
Track E (Zoom)

### Track E

#### Zoom

talk Computation, Machine Learning, and AI

### Speaker

Irina Espejo Morales (New York University (US))

### Description

Excursion is a tool to efficiently estimate level sets of
computationally expensive black box functions using Active Learning.
Excursion uses a Gaussian Process Regression as a surrogate model for
the black box function. It queries the target function (black box) iteratively in order to increase the available information regarding the desired level sets. We implement Excursion using GPyTorch which provides
state-of-the-art fast posterior fitting techniques and takes advantage
of GPUs to scale computations to higher dimensions.

In this talk, we demonstrate that Excursion significantly outperforms
traditional grid search approaches and we will detail the current work
in progress on improving Exotics searches as an intermediate step towards the ATLAS Run 2 pMSSM scan on $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector.

Are you are a member of the APS Division of Particles and Fields? No

### Primary author

Irina Espejo Morales (New York University (US))

### Co-authors

Lukas Alexander Heinrich (CERN) Patrick Rieck (Max-Planck-Institut fur Physik (DE)) Prof. Gilles Louppe (University of Liège) Kyle Stuart Cranmer (New York University (US))

### Presentation materials

 DPF 2021.pdf Recording