Can high-$p_{\perp }$ theory and data constrain $\hat{I}\cdot /s$?

Abstract

Understanding the temperature dependence of the specific shear viscosity $(\hat{I}\cdot /s)$ is crucial for characterizing the properties of the QCD matter produced in ultrarelativistic heavy-ion collisions. Since, low-$p_{\perp }$ theory and data are only weakly sensitive to the typical forms of $\hat{I}\cdot /s(T)$, especially at high temperatures, we use high-$p_{\perp }$ data and theory to impose additional constraints on it. Our approach, based on dynamical radiative and collisional energy loss of high-$p_{\perp }$ particles, provides promising results in constraining the temperature dependence of $\hat{I}\cdot /s$.

ATHIC conference proceedings