Early Career Researcher Input to the European Strategy for Particle Physics Update: White Paper (2503.19862v2)

Abstract: This document, written by early career researchers (ECRs) in particle physics, aims to represent the perspectives of the European ECR community and serves as input for the 2025--2026 update of the European Strategy for Particle Physics. With input from a community-wide survey, it highlights key challenges faced by ECRs -- career stability, funding access and long-term research opportunities -- while proposing policy recommendations and targeted initiatives. It underscores the importance of practices fostering diverse, equitable, inclusive and healthy workplaces, as well as of stronger ECR communities, and highlights how effective communication and interdisciplinary collaborations reinforce the societal relevance of particle physics and promote continued support for large-scale and long-term projects. Finally, the future of both collider and beyond-collider experiments is addressed, emphasising the critical role of ECRs in shaping future projects. The ECR contribution is formed of two parts: the ten-page executive summary submitted as input to the European Strategy for Particle Physics Update and, as backup document, this extended white paper providing additional context.

Overview of Recommendations from Early Career Researchers to the European Strategy for Particle Physics Update

The white paper on "Early Career Researcher Input to the European Strategy for Particle Physics Update" outlines the perspectives and recommendations of early career researchers (ECRs) in the European particle physics community. This document serves as a comprehensive input to the 2025–2026 strategy update, offering critical insights into the challenges faced by ECRs and proposing measures to address these issues. With contributions from diverse working groups and survey data from 804 European ECRs, the white paper aims to represent the collective voice of young researchers in shaping the future of particle physics.

Challenges and Recommendations

Career Prospects and Stability

ECRs express concerns regarding career instability, frequent relocations, and limited prospects for permanent academic positions. The survey reveals that only a minority of ECRs foresee favorable career outcomes in particle physics, underscoring the need for structural changes. Recommendations include extending postdoctoral positions to at least two years, reducing the emphasis on relocation for career advancement, and improving transparency regarding career trajectories from the outset.

Mental Health and Well-being

Mental health challenges are prevalent among ECRs, exacerbated by the demands and uncertainties of academic life. Key recommendations emphasize the need for institutions to allocate funding to mental health support, provide emotional feedback and assistance, and establish mandatory training for supervisors to foster a more supportive environment.

Community Building and Representation

The representation of ECRs within decision-making processes, including the European Strategy for Particle Physics Update (ESPPU), is highlighted as crucial. Enhanced transparency in the selection of ECR representatives and increased funding for ECR-led initiatives are advocated to strengthen community engagement and ensure that young researchers have a meaningful influence on strategic directions.

Diversity, Equity, and Inclusion (DEI)

Survey data indicates significant disparities in inclusivity and diversity within research environments. ECRs call for robust DEI policies, mandatory educational programs, and structured monitoring practices. The establishment of DEI Offices and the promotion of safe spaces for marginalized groups are recommended to foster an equitable and respectful workplace culture.

Communication and Outreach

Effective science communication is pivotal for sustaining public and industrial support for particle physics. The white paper underscores the importance of integrating communication training into academic curricula and formally acknowledging outreach efforts within institutional evaluation metrics. It advocates for promoting storytelling centered on the observational capabilities of particle physics research rather than merely discovery potential.

Discussion on Future Colliders

While ECRs strongly support the development of a next-generation collider, opinions differ on its specific form. However, the need for technological innovation and a comprehensive baseline physics program are highlighted as critical factors guiding the decision. The report stresses the necessity of a transparent and democratic decision-making process and calls for accepting the strategic outcome even if it diverges from individual preferences.

Beyond Collider Physics

Beyond-collider research is acknowledged as an integral part of the particle physics landscape, contributing complementary studies and methodological advances to collider experiments. The report advocates for dedicated funding schemes and strategic recommendations in the ESPPU to promote the sustainability and growth of beyond-collider physics.

Concluding Remarks

The collective recommendations presented by ECRs reflect a commitment to fostering a vibrant, inclusive, and innovative scientific community. By addressing challenges related to career stability, mental health, DEI, communication, and strategic planning, this white paper aims to ensure a prosperous future for particle physics. The active involvement and support of ECRs in shaping initiatives and policies are deemed essential for maintaining momentum and achieving long-term scientific objectives. The early career researchers' contributions are presented in hopes that they inspire thoughtful consideration and action from the European Strategy Group as they draft the forthcoming strategy update.