Femtoscopy analysis of d-Au interactions at $\sqrt{s}=200$GeV

TL;DR

This paper uses hydrodynamic modeling to analyze femtoscopic correlation radii in d-Au collisions at 200 GeV, revealing asymmetries and angular dependencies linked to source geometry and flow.

Contribution

It provides the first detailed hydrodynamic femtoscopy analysis of d-Au collisions, including predictions for non-zero out-long radii and azimuthal angular dependence.

Findings

Correlation radii match PHENIX data for symmetric systems.

Estimated non-zero R_out-long due to asymmetric fireball lifetimes.

Significant azimuthal dependence of radii indicating strong source asymmetry.

Abstract

The femtoscopy correlation radii for d-Au collisions at $200$GeV are calculated in the hydrodynamic model and compared to PHENIX collaboration data. For asymmetric systems, such as d-Au or p-Pb collisions, the correlation radius $R_{out-long}$ is estimated and predicted to be non-zero. It appears due to different lifetimes of the parts of the fireball at positive and negative rapidities. Azimuthally sensitive Hanbury Brown-Twiss analysis with respect to the second order event plane shows a significant angular dependence of the radii. It reflects the strong azimuthal asymmetry of the d-Au source geometry and flow for central interactions.