Inequalities and Asymptotics for some Moment Integrals

Abstract

For $\alpha>\beta-1>0$, we obtain two sided inequalities for the moment integral $I(\alpha,\beta)= \int_{\mathbb{R}} |x|^{-\beta}|\sin x|^{\alpha}dx$. These are then used to give the exact asymptotic behavior of the integral as $\alpha \to \infty$. The case $I(\alpha,\alpha)$ corresponds to the asymptotics of Ball's inequality, and $I(\alpha,[\alpha]-1)$ corresponds to a kind of novel "oscillatory" behavior.