Pion femtoscopy in p+p collisions at sqrt(s)=200 GeV

Understand

The STAR Collaboration at RHIC has measured two-pion correlation functions from p+p collisions at sqrt(s)=200 GeV.

• Spatial scales are extracted via a femtoscopic analysis of the correlations, though this analysis is complicated by the presence of strong non-femtoscopic effects.
• Our results are put into the context of the world dataset of femtoscopy in hadron-hadron collisions.
• We present the first direct comparison of femtoscopy in p+p and heavy ion collisions, under identical analysis and detector conditions.