Finite volume study of electric polarizabilities from lattice QCD

Knowledge of the electric polarizability is crucial to understanding the interactions of hadrons with electromagnetic fields. The neutron polarizability is very sensitive to the quark mass and is expected to diverge in the chiral limit. Here we present results for the electric polarizability of the neutron, neutral pion, and neutral kaon on eight ensembles with nHYP-smeared clover dynamical fermions with two different pion masses (227 and 306 MeV). These are currently the lightest pion masses used in polarizability studies. For each pion mass we compute the polarizability at four different volumes and perform an infinite volume extrapolation for the three hadrons. Along with the infinite volume extrapolation we conduct a chiral extrapolation for the kaon polarizability to the physical point. We compare our results for the neutron polarizability to predictions from chiral perturbation theory.Comment: 7 pages, 11 figure

The Impact of Analytics in Professional Baseball: How Long Before Performance Improves

This study extends previous analyses of winning percentage since 2014 for the 30 MLB teams and whether these performance data could have been predicted by the teams’ analytics adoption. The study also includes stadium attendance as a secondary indicator of performance. Based on MLB teams’ 2014 analytics adoption as reported by ESPN, there are statistically significant differences in teams’ winning percentage, attendance percentage, and cumulative (multiple seasons combined) winning percentage when looking at performance data in the three subsequent years (2015-2017). The differences in winning percentage remain significant for multiple seasons, though with decreasing statistical strength. MLB teams should be aware that an immediate benefit from analytics adoption may not occur, but subsequent years may see stronger results. This aspect of analytics adoption is a critical aspect to analytics usage, and this potential lag effect should be considered when adopting new methods and techniques in any part of the organization