Involving other communities through challenges and cooperation

The ATLAS collaboration has recently setup three projects targeting citizen science or specific communities : The goal of the HiggsML project was to bring particle physicists and data scientists together through a challenge: compete online to obtain the best Higgs to tau tau signal significance on a set of ATLAS fully simulated signal and background. The challenge ran from May to September 2014, drawing considerable attention. In total, there were 1785 teams that participated, making it the most popular challenge at the time on the Kaggle platform. The ATLAS@home project allows volunteers to run simulations of collisions in the ATLAS detector. During the first year the community mostly consisted of software fans, who were attracted by the technical challenge and contributed greatly to the debugging through the message boards on the website. With the start of LHC, the number of people attracted for outreach reasons grew. Higgs Hunters is the first Particle Physics project hosted on the web-based citizen science platform, Zooniverse. Volunteers are asked to scan ATLAS data and Monte Carlo events, looking for secondary vertices. Results will be compared to the ATLAS secondary vertex finding algorithm in the context of the search for long lived particles in supersymmetric models. To date, more than 8,000 users have taken part, classifying more than 900,000 interesting features in ATLAS event displays. The setup, current success and future of each project will be reviewed.