Cross Sections Science Analysis Group (XS SAG)

NASA's Physics of the Cosmos Program Introduces XS SAG

Under NASA's Physics of the Cosmos Community Program Analysis Group (PhysPAG), the Cross Sections for Cosmic Rays Science Analysis Group (XS SAG) has been established. This newly formed working group aims to systematically organize and evaluate data across high-energy astrophysics and nuclear physics. Operating with an open membership structure, XS SAG invites contributions from researchers across astrophysics, particle physics, and nuclear science disciplines.

Integrating Observational Data with Laboratory Cross Sections

The core objective of XS SAG is to compile the status of current and upcoming space-based and balloon-borne cosmic-ray experiments. The group will analyze the interplay between these orbital and atmospheric observation datasets and ground-based nuclear cross-section measurements. This synthesis is essential for ensuring accurate theoretical interpretation of cosmic-ray spectra collected by high-altitude detectors.

Bridging Astrophysics and Nuclear Physics

Understanding the origin, acceleration, and propagation of cosmic rays provides critical insight into the most energetic phenomena in the universe. By identifying measurement gaps and fostering collaboration between nuclear physicists and astrophysicists, XS SAG aims to enhance high-energy cosmic-ray models. The group's findings will help inform the design of future space missions and experimental particle physics studies.