Erratum: “Accurate modeling of the hose instability in plasma wakefield accelerators” [Phys. Plasmas 25, 056703 (2018)]

We would like to correct a typographical error which was introduced in Eqs. (5), (11), (14), (20a), and (20b) during revision of Ref. 1. The series expansion of the plasmaelectron phase space density to the first order of 〈x〉 and 〈px〉 [Eq. (5) in Ref. 1] correctly reads fp ≈ fp0 - cos θ (〈x〉∂r + 〈px