8-12 July 2019
Polokwane
Africa/Johannesburg timezone
Deadline for papers for the conference proceedings is 15 August 2019

Analysis of a deep neural network for missing transverse momentum reconstruction with the ATLAS detector

9 Jul 2019, 12:00
20m
Protea The Ranch Hotel (Polokwane)

Protea The Ranch Hotel

Polokwane

Oral Presentation Track B - Nuclear, Particle and Radiation Physics Nuclear, Particle and Radiation Physics

Speaker

Mr Matthew Leigh (University of Cape Town)

Description

The missing transverse momentum ($E_T^{miss}$) of a $pp$ collision is an important observable as it serves as a proxy for the transverse momentum carried away by undetectable particles. In addition to Standard Model neutrinos, there exist many theorised particles which would not leave any signals in a detector. Therefore, measuring $E_T^{miss}$ with high degrees of accuracy is critical for the understanding many physical processes which take place at the LHC, in the Standard Model and beyond. ATLAS currently utilises several working points to reconstruct the $E_T^{miss}$ of the hard-scatter interaction using only the observed objects. The optimal choice of working point depends strongly on the event topology. The aim of this project is to investigate the use of a deep neural network, trained using Monte-Carlo samples, to develop a more accurate $E_T^{miss}$ reconstruction, which is independent of topology and more resilient to pile-up effects. We demonstrate how the network improves $E_T^{miss}$ accuracy in both simulated and real data, and how this new method might assist in searches for physics beyond the Standard Model.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Primary author

Mr Matthew Leigh (University of Cape Town)

Co-author

Dr Sahal Yacoob (University of Cape Town)

Presentation Materials

Peer reviewing

Paper