Frontstretch

Sigma Acquires AM, Will Field O’Reilly, ARCA Teams

Sigma Performance Services has acquired AM Racing, with the organizations combining to compete across multiple racing series ...

Sigma Performance Services Racing Acquires Team, Ford Partnership

Sigma Performance Services Racing has acquired AM Racing and will field a NASCAR O'Reilly Auto Parts Series entry in 2026.
Speedway Digest

Sigma Performance Services Racing Set for Snowball Derby Weekend with Gabe Brown and Preston Peltier at Five Flags Speedway

The organization will field entries in both the Allen Turner Snowflake 125 and the 58th annual Snowball Derby, showcasing its ...
Speedway Digest

Sigma Performance Services Racing Acquires AM Racing, Expands National Footprint with Ford Racing Support

Sigma Performance Services Racing (SPS Racing) today announced the acquisition of AM Racing, uniting two successful ...
Nature

Sigma Models and Integrable Field Theories

Sigma models are a class of field theories where the fundamental fields constitute maps from a spacetime manifold to a target space endowed with rich geometric structures. These models have been ...