We present a lattice QCD study of the K∗(892) resonance using eight Nf=2+1 Wilson-Clover ensembles with three lattice spacings and six pion masses ranging from 135 to 320 MeV. For each ensemble, a large number of finite volume energy levels in the P-wave Kπ channel are determined. The energy dependence of the scattering phase shift is then obtained from L\"uscher's finite-volume method. To systematically assess parametrization dependence, the amplitude is described using three different models, which yield consistent results. The resulting phase shifts show a clear resonant behavior for all ensembles, and the corresponding K∗(892) resonance pole is identified on the second Riemann sheet in the complex energy plane. The pole positions are extrapolated to the physical pion mass and the continuum limit, yielding a K∗(892) resonance located at s0=[883(22)−i20(13)]MeV, which is in excellent agreement with the experimental value. This study provides a first-principles QCD determination of the K∗(892) mass and width with controlled systematic uncertainties.
@article{arxiv.2603.16266,
title = {Lattice QCD study of the $K^*(892)$ resonance at the physical point},
author = {Qu-Zhi Li and Chuan Liu and Liuming Liu and Peng Sun and Jia-Jun Wu and Zhiguang Xiao and Han-Qing Zheng},
journal= {arXiv preprint arXiv:2603.16266},
year = {2026}
}