Preface

Abstract

This volume of the IOP Conference Series is dedicated to scientific contributions presented at the 20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021). In 2021, the motto guiding the scientific program was “AI Decoded: Towards Sustainable, Diverse, Performant and Effective Scientific Computing”. The workshop took place from November 29, 2021 to December 3, 2021 in Daejeon, Korea and virtually through teleconferencing.Due to the ubiquitous travel restrictions, most of the about 600 attendees participated virtually. ACAT is badged as a workshop, rather than a conference, because we believe discussions are a key ingredient. The significant fraction of virtual participation impacted this workshop atmosphere in 2021, despite the tremendous work that the Local Organizing Committee has invested in the successful workshop.To cater to virtual presentations, ACAT 2021 featured a highly focused scientific program with reduced session duration. Nonetheless, the scientific program was rich and varied, bringing together experts of all relevant fields from around the globe. It included fourteen invited presentations, both from High Energy and Nuclear Physics such as on “Normalizing Flows for LHC Theory” and “High Performance Analysis, Today and Tomorrow”, as well as from other fields such as the WHO.The parallel program consisted of three tracks, namely Computing Technology for Physics Research, Data Analysis – Algorithms and Tools, and Computations in Theoretical Physics: Techniques and Methods. These tracks featured 75 oral and 128 poster contributions. The posters were presented in a virtual environment that succeeded in engaging the audience.This was the last edition of ACAT that was unaffected by the Russian invasion of Ukraine and the subsequent statement of support from some Russian Federation Institutes.ACAT 2021 is co-organized by the Institute for Basic Science (IBS), the Korea Institute of Science and Technology Information (KISTI), and Soongsil University. IBS is supported by Grant No. IBS-R016-D1 and Soongsil University is supported by the National Research Foundation (NRF) of Korea Grant No. 2016R1D1A1B02012900. ACAT 2021 would like to thank for the support by the Asia Pacific Center for Theoretical Physics (APCTP), the Daejeon International Marketing Enterprise (DIME), the Korean Physical Society (KPS), Brookhaven National Laboratory, Fermi National Accelerator Laboratory, Thomas Jefferson National Accelerator Facility, and Micron Technology, Inc.List of Local Organizing Committee, Scientific Programming Committee, International Advisory Committee, Co-organizers, Sponsors are available in this Pdf.