Google Summer of Code 2025

Phase 1 selection

Phase 2 selection

ATLAS is one of the four major experiments at the Large Hadron Collider (LHC) at CERN. It is a general-purpose particle physics experiment run by an international collaboration and is designed to exploit the full discovery potential and the huge range of physics opportunities that the LHC provides.

BioDynamo is an agent-based, simulation software that is designed to simulate the behaviour of biological entities.

CICADA Calorimeter Image Convolutional Anomaly Detection Algorithm: Real-time anomaly detection at CMS.

The CernVM-File System (CVMFS) is a global, read-only POSIX file system that provides the universal namespace /cvmfs. It is based on content-addressable storage, Merkle trees, and HTTP data transport. CernVM-FS provides a mission critical infrastructure to small and large HEP collaborations.

Clad is an automatic differentiation (AD) tool for C++

Constellation is a control and data acquisition system for small-scale experiments.

The CppInterOp library provides a minimalist approach for other languages to bridge C++ entities (variables, classes, etc.). This enables interoperability with C++ code, bringing the speed and efficiency of C++ to simpler, more interactive languages like Python.

Ganga is a computational task-management tool, which allows for the specification, submission, bookkeeping and post-processing of computational tasks on a wide set of distributed resources. Ganga has been developed to solve a problem increasingly common in scientific projects, which is that researchers must regularly switch between different processing systems, each with its own command set, to complete their computational tasks. Ganga provides a homogeneous environment for processing data on heterogeneous resources.

Geant4 is a toolkit for the simulation of the passage of particles through matter.

The Nopayloaddb is an implementation of the HSF Conditions Database reference, an experiment-agnostic design for conditions data access management.

The JuliaHEP working group brings together a community of developers and users of Julia in Particle Physics, with the aim of improving the sharing of knowledge and expertise, as well as unify effort in developing Julia packages useful for the community.

MCnet is a community linking the developers of particle-theory simulations with experimentalists and others who use and make tools for analysing the simulated events. Projects may be available from both aspects of the community.

ML4EP is a project of the CERN SFT group focused on developing common machine learning (ML) software tools to support HEP experiments.

Patatrack project started in 2016 by a group of people with various area of expertise, such as software optimization, heterogeneous computing, track reconstruction and High Level Trigger (HLT) at the CMS experiment at CERN. The goal was to demonstrate that part of the HLT reconstruction could be efficiently offloaded on machines equipped with GPUs for parallel execution. Nowadays, Patatrack developments have been integrated into the CMS software for event reconstruction and the project focuses on the exploration of innovative software and hardware technologies to bring smart software closer to the detectors read-out at CERN experiments.

ROOT is a modular scientific software framework. It provides all the functionalities needed to deal with big data processing, statistical analysis, visualisation and storage.

Rucio is an open-source data management framework that enables scientific collaborations to efficiently organize, monitor, and access distributed data across diverse infrastructures.

Xeus-Cpp is a Jupyter kernel for C++ based on the native implementation of the Jupyter protocol xeus.

Argonne National Lab (ANL) is a multidisciplinary science and engineering research center, where talented scientists and engineers work together to answer the biggest questions facing humanity, from how to obtain affordable clean energy to protecting ourselves and our environment.

BALER is a compression tool undergoing development at the particle physics division of the University of Manchester. BALER uses autoencoder and other types of neural networks as a type of lossy machine learning-based compression to compress multi-dimensional data and evaluate the accuracy of the dataset after compression. BALER is led by a collaboration of early-career scientists and welcomes all contributions.

Brookhaven National Laboratory (BNL) is a multipurpose research laboratory located in Upton, New York. It is operated by Brookhaven Science Associates for the U.S. Department of Energy. It hosts the Relativistic Heavy Ion Collider, the future Electron-Ion Collider and the National Synchrotron Light Source II. BNL scientists are part of major HEP experiments, such as ATLAS, Belle II, and DUNE.

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. They use the world’s largest and most complex scientific instruments to study the basic constituents of matter – the fundamental particles.

The Compiler Research Group is a group of programming language enthusiasts at Princeton University and CERN. It’s primary goal is to research foundational software tools that help scientists program for speed, interoperability, interactivity, flexibility, and reproducibility.

The Deutsches Elektronen-Synchrotron (DESY) is a major German physics laboratory with a long interest in high-energy physics. DESY is a major centre for photon science and the site of the European XFEL laser. DESY scientists are part of major international HEP experiments, such as ATLAS, CMS and Belle II.

Imperial College London is a world top ten university with an international reputation for excellence in teaching and research. Consistently rated amongst the world’s best universities, Imperial is committed to developing the next generation of researchers, scientists and academics through collaboration across disciplines. Located in the heart of London, Imperial is a multidisciplinary space for education, research, translation and commercialisation, harnessing science and innovation to tackle global challenges.

Monash University Monash University is one of Australia’s leading universities and ranks among the world’s top 100. We help change lives through research and education. It has a large faculty of Science that is active across all areas of Science from Particle Physics to the development of new methods for identifying rare earth minerals.

Princeton University is a private Ivy League research university in Princeton, New Jersey.

Founded in 1826 in the heart of London, University College London is London’s leading multidisciplinary university, with more than 13,000 staff and 42,000 students from 150 different countries. It is one of the UK’s leading groups in the field of particle physics.

The University of Glasgow is a leading UK research university based in Scotland’s largest city. We work on particle physics experiments from the LHC to neutrinos, particle theory from interpretations of Higgs and top-quark measurements to the strong force, and high-performance distributed computing.

The University of Manchester is a leading UK research university. We have a large particle physics group with contributions to LHC experiments, dark matter, flavour, neutrino and muon experiments. We also carry out research into new detector technologies and new data acquisition strategies for future experiments. We are also involved in distributed computing for LHC experiments, hosting one of the largest and most successful Tier-2 distributed computing centres in the UK.