Speaker
Description
sPHENIX is a state-of-the-art experiment at the Relativistic Heavy Ion Collider (RHIC),
dedicated on the study of heavy-flavor and jet physics. Its novel streaming-readout-capable,
precision tracking system allows for heavy-flavor measurements through high-statistics,
unbiased data samples with exceptional precisions. During the 2024 run, sPHENIX was fully
commissioned, collecting a sample of 100 billion unbiased p+p collisions and a further
sample of minimum-bias Au+Au collisions. The ongoing 2025 run is further enhancing the
dataset with high-statistics Au+Au collisions. This extensive p+p collision sample enables
heavy-flavor physics measurements in p+p collisions with orders of magnitude more statistics
than that previously available at RHIC. Notably, there has been no prior measurement of the
Lambda_c / D0 baseline in p+p collisions at RHIC energies. The large sPHENIX dataset now
enables the first exploration of key open questions, such as the hadronization mechanism of
baryons and the strange-to-light flavor meson ratio. We will present the status of the first
measurements of the Lambda_c / D0 ratio and the similarly unexplored D_s+ / D+ ratio in
p+p collisions.
