We present simulations of the 1-dimensional Oslo rice pile model in which the
critical height at each site is randomly reset after each toppling. We use the
fact that the stationary state of this sandpile model is hyperuniform to reach
system of sizes >107. Most previous simulations were seriously flawed by
important finite size corrections. We find that all critical exponents have
values consistent with simple rationals: ν=4/3 for the correlation length
exponent, D=9/4 for the fractal dimension of avalanche clusters, and z=10/7 for the dynamical exponent. In addition we relate the hyperuniformity
exponent to the correlation length exponent ν. Finally we discuss the
relationship with the quenched Edwards-Wilkinson (qEW) model, where we find in
particular that the local roughness exponent is αloc=1.Comment: 20 pages, 26 figure