Jets Substructure from Calorimeter Subjets in sPHENIX

The use of jets as a probe in p+A and A+A collisions allows access to the interaction of partons produced in hard-scattering interactions with the nuclear environment and is sensitive to a wide range of scales. Measurements of jets and jet substructure in these systems will provide unprecedented access to details of partonic interactions with the nuclear medium. The sPHENIX detector currently under construction at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC) is designed with complete hadronic and electromagnetic calorimetry, enabling precise studies of calorimetric jets substructure in ways previously inaccessible at RHIC, using anti-kT R=0.2 "subjets" as constituents to form larger R jets.