Dear Colleagues,
We are pleased to announce that the 8th International Symposium on Ultra High Energy Cosmic Rays (UHECR2026/7) will take place from 18 to 22 January 2027 at Academia Sinica in Taipei, Taiwan.
UHECR2026/7 continues the symposium series previously held in Nagoya (2010), CERN (2012), Springdale, Utah (2014), Kyoto (2016), Paris (2018), L'Aquila (2022), and Malargüe (2024).
The symposium will bring together the international community to discuss new observational results, theoretical developments, and future directions in ultra-high-energy cosmic-ray physics. The program will also cover the transition between Galactic and extragalactic cosmic rays and relevant connections at lower energies.
Topics will include:
- cosmic-ray sources and acceleration;
- propagation and magnetic fields;
- energy spectrum, mass composition, and anisotropy;
- the transition between Galactic and extragalactic cosmic rays;
- multi-messenger connections, including photons, neutrinos, and gravitational waves;
- hadronic interactions in air showers and at accelerators;
- direct cosmic-ray measurements and cross-calibration;
- physics beyond the Standard Model; and
- new and future experiments.
The scientific program will consist of invited reviews, contributed talks, and reports from inter-collaboration working groups, all in plenary sessions. Poster contributions are welcome. Each accepted poster will be accompanied by a five-minute flash talk, and posters may remain on display throughout the symposium.
UHECR2026/7 will be an in-person meeting. Special emphasis will be placed on providing an ideal environment for interaction among participants.
Important dates
- Registration opens: 5 August 2026
- Abstract submission opens: 5 August 2026
- Abstract submission deadline: 1 October 2026, 23:59 UTC
- Early Bird registration deadline: 31 October 2026, 23:59 Asia/Taipei
- Symposium: 18–22 January 2027
Abstracts may be submitted for contributed oral or poster presentation. Acceptance decisions and the detailed program will be announced later.
Registration fees
| Category | Early Bird | Late |
|---|---|---|
| Full | NT$ 13,000 | NT$ 14,500 |
A limited number of junior participants may apply for a reduced fee during registration.
The conference fee includes coffee breaks, lunches, and the Welcome Reception. A separate social-event fee of NT$ 2,000 per participant covers the optional excursion and Conference Dinner. Accompanying persons joining the social program are charged the same NT$ 2,000 fee per person.
Payment instructions will be announced separately.
Venue and practical information
The symposium will be held in the International Conference Hall at Academia Sinica. Taipei in January typically has high humidity and temperatures of approximately 15–22 °C.
Travel, accommodation, and visa information is available on the symposium website and will be updated as arrangements are finalized. Participants who require a visa or entry permit should register and contact the organizers at least three months before travel. Current entry requirements should always be checked with Taiwan's Bureau of Consular Affairs.
Accommodation
A limited number of single and double rooms will be available at the Academia Sinica Guest House and Green World Nangang. Participants wishing to be considered for these rooms should provide their preferred room type and estimated arrival and departure dates when registering. All accommodation requests are subject to availability and confirmation by the organizers.
Social program
The preliminary social program includes a Welcome Reception on Monday evening, an optional excursion on Thursday afternoon, and the Conference Dinner on Thursday evening. Locations and further details will be announced later. Accompanying persons are welcome to join the excursion and Conference Dinner at the same NT$ 2,000 social-event fee.
Proceedings
Proceedings are planned. Contributions will be obligatory for Joint Working Group, Summary, and Highlight talks and optional for other speakers. Further instructions and the submission deadline will be announced later.
Registration, abstract submission, and further information:
https://indico.phys.sinica.edu.tw/event/523/
Questions:
We look forward to welcoming you to Taipei.