17-22 April 2017
UZ Obergurgl
Europe/Zurich timezone

The BSM-AI project: SUSY-AI - Generalizing LHC limits on Supersymmetry with Machine Learning

19 Apr 2017, 16:45
15m
UZ Obergurgl

UZ Obergurgl

University Center Obergurgl Gaisbergweg 5 6456 Obergurgl Austria
Afternoon Session Physics Beyond the Standard Model Wednesday Afternoon

Speaker

Mr Bob Stienen (RU Nijmegen)

Description

A key research question at the Large Hadron Collider (LHC) is the test of models of new physics. Testing if a particular parameter set of such a model is excluded by LHC data is a challenge: it requires time consuming generation of scattering events, simulation of the detector response, event reconstruction, cross section calculations and analysis code to test against several hundred signal regions defined by the ATLAS and CMS experiments. In the BSM-AI project we attack this challenge with a new approach. Machine learning tools are thought to predict within a fraction of a millisecond if a model is excluded or not directly from the model parameters. A first example is SUSY-AI, trained on the phenomenological supersymmetric standard model (pMSSM). About 300,000 pMSSM model sets – each tested against 200 signal regions by ATLAS – have been used to train and validate SUSY-AI. The code is currently able to reproduce the ATLAS exclusion regions in 19 dimensions with an accuracy of at least 93%. It has been validated further within the constrained MSSM and the minimal natural supersymmetric model, again showing high accuracy. SUSY-AI and its future BSM derivatives will help to solve the problem of recasting LHC results for any model of new physics.

Primary authors

Mr Bob Stienen (RU Nijmegen) Sascha Caron (Nikhef National institute for subatomic physics (NL)) Roberto Ruiz De Austri (IFIC) Jong Soo Kim (IFT Madrid) Krzysztof Rolbiecki (University of Warsaw)

Presentation Materials