Les Houches 2019 Physics at TeV Colliders: New Physics Working Group Report

This report presents the activities of the `New Physics' working group for the `Physics at TeV Colliders' workshop (Les Houches, France, 10--28 June, 2019). These activities include studies of direct searches for new physics, approaches to exploit published data to constrain new physics, as well as the development of tools to further facilitate these investigations. Benefits of machine learning for both the search for new physics and the interpretation of these searches are also presented

Benchmark data and model independent event classification for the large hadron collider

We describe the outcome of a data challenge conducted as part of the Dark Machines (https://www.darkmachines.org) initiative and the Les Houches 2019 workshop on Physics at TeV colliders. The challenged aims to detect signals of new physics at the Large Hadron Collider (LHC) using unsupervised machine learning algorithms. First, we propose how an anomaly score could be implemented to define model-independent signal regions in LHC searches. We define and describe a large benchmark dataset, consisting of > 1 billion simulated LHC events corresponding to 10 fb1 of proton-proton collisions at a center-of-mass energy of 13 TeV. We then review a wide range of anomaly detection and density estimation algorithms, developed in the context of the data challenge, and we measure their performance in a set of realistic analysis environments. We draw a number of useful conclusions that will aid the development of unsupervised new physics searches during the third run of the LHC, and provide our benchmark dataset for future studies at https://www.phenoMLdata.org. Code to reproduce the analysis is provided at https://github.com/bostdiek/DarkMachines-UnsupervisedChallenge.Thea Aarrestad, Melissa van Beekveld, Marcella Bona, Antonio Boveia, Sascha Caron, Joe Davies, Andrea De Simone, Caterina Doglioni, Javier M. Duarte, Amir Farbin, Honey Gupta, Luc Hendriks, Lukas Heinrich, James Howarth, Pratik Jawahar, Adil Jueid, Jessica Lastow, Adam Leinweber, Judita Mamuzic, Erzsébet Merényi, Alessandro Morandini, Polina Moskvitina, Clara Nellist, Jennifer Ngadiuba, Bryan Ostdiek, Maurizio Pierini, Baptiste Ravina, Roberto R. de Austri, Sezen Sekmen, Mary Touranakou, Marija Vaškeviˇci, ute, Ricardo Vilalta, Jean-Roch Vlimant, Rob Verheyen, Martin White, Eric Wulff, Erik Wallin, Kinga A. Wozniak, and Zhongyi Zhan