Cosmic-ray (CR) physics in the GeV-TeV range has entered a precision era with recent data from space-based experiments. However, the poor knowledge of nuclear reactions (production of antimatter and secondary nuclei) limits the information that can be extracted from these data (such as source properties, transport in the Galaxy, and indirect searches for dark matter).
The first edition of this workshop was held in 2017 (XSCRC17). Its goal, bringing together different communities (CR theorists, CR experimentalists, nuclear and particle physicists), was to review theoretical motivations for CR studies, new CR data, and how the modelling of CRs crucially depends on nuclear reactions. The workshop was also strongly aimed at presenting current efforts and discussing forthcoming perspectives for particle/nuclear measurement campaigns.
This second edition (XSCRC2019) reviewed the advances made and highlighted some results obtained thanks to collaborations started during the first edition.
The 2024 edition (XSCRC2024) has further strengthened these emergent synergies, taking advantage of the complementarity and know-how of different communities: the challenges that the interpretation of high-precision CR data poses can only be undertaken with a collective and coordinated effort. The round tables were oriented to write a white paper, which is now published as a Physics Report.
This edition will address new experimental and theoretical results. Specific to this edition will be a few dedicated round tables involving the wider community. They will be focused on maximising the effectiveness of our efforts on i) experimental facilities, ii) cross-sections data curation, databases and codes, and iii) a more structured organisation of our initiatives.
A call for abstracts will be open from Sept. 1st to Oct. 20th, 2026.
Thanks to the kind hospitality of CERN, the workshop has no registration fee. A number of CERN hostel rooms have been pre-booked for the workshop participants.
Duration: January 13-15, 2027. We plan to start on Wed 13th at 2 pm, and end on Fri 15th in the early afternoon.
Organizing Committee: F. Donato (chair), D. Maurin (co-chair), S. Mariani (co-chair)
Invited Speakers: TBA
Scientific Advisory Committee: Laurent Audoin (IJClab), Miguel Escudero (CERN), Carmelo Evoli (GSSI), Chiara Lucarelli (CERN), Mercedes Paniccia (Geneva Univ.), Thomas Pöeschl (CERN), Philip von Doetinchem (Hawaii Univ.).
