26-30 July 2021
Zoom
Europe/Berlin timezone

METNet: A combined missing transverse momentum working point using a neural network with the ATLAS detector

Not scheduled
20m
Zoom

Zoom

Poster Searches for New Physics T10: Searches for New Physics

Speaker

Benjamin Haslum Hodkinson (Cambridge)

Description

In order to suppress pile-up effects and improve resolution, ATLAS employs a suite of working points for missing transverse momentum ($p_{\text{T}}^{\text{miss}}$) reconstruction, and each is optimal for different event topologies and different beam conditions. A neural network (NN) can exploit various event properties to pick the optimal working point on an event-by-event basis and also allows to combine complementary information from each of the working points. The resulting regressed $p_{\text{T}}^{\text{miss}}$ (METNet) offers improved resolution and pile-up resistance across a number of different topologies compared to the current $p_{\text{T}}^{\text{miss}}$ working points. Additionally, by using the NN's confidence in its predictions, a machine learning-based $p_{\text{T}}^{\text{miss}}$ significance (`METNetSig') can be defined. This poster presents simulation-based studies of the behaviour and performance of METNet and METNetSig for several topologies compared to current ATLAS $p_{\text{T}}^{\text{miss}}$ reconstruction methods.

Collaboration / Activity ATLAS
First author Benjamin Haslum Hodkinson
Email bh490@cam.ac.uk

Primary author

Presentation Materials