  We simulate decaying turbulence in electron-positron pair plasmas using a
fully- kinetic particle-in-cell (PIC) code. We run two simulations with
moderate-to-low plasma beta. The energy decay rate is found to be similar in
both the cases. The perpendicular wave-number spectrum of magnetic energy shows
a slope of k^-1.3 in both the cases. The particle energy distribution function
shows the formation of a non-thermal feature in the case of lower plasma beta,
with a slope close to E^-1. The role of thin turbulent current sheets in this
process is investigated. The heating by E_{\parallel}.J_{\parallel} term
dominates the E_{\perp}.J_{\perp} term. Regions of strong
E_{\parallel}.J_{\parallel} are spatially well-correlated with regions of
intense current sheets, which also appear correlated with regions of strong
E_{\parallel} in the low beta simulation, suggesting an important role of
magnetic reconnection in the dissipation of low beta plasma turbulence.
