Pion femtoscopy in p+p collisions at sqrt(s)=200 GeV
M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J., Alford, B. D. Anderson, D. Arkhipkin, G. S. Averichev, J. Balewski, L. S., Barnby, S. Baumgart, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R., Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik
TL;DR
This paper presents femtoscopic measurements of two-pion correlations in proton-proton collisions at 200 GeV, comparing results with heavy ion data to understand spatial scales and effects.
Contribution
It provides the first direct comparison of femtoscopy in p+p and heavy ion collisions using identical analysis methods and detector conditions.
Findings
Spatial scales extracted from correlation functions.
Presence of strong non-femtoscopic effects.
Comparison with world dataset of hadron-hadron femtoscopy.
Abstract
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.
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