Spectroscopy and Decay Constants from Nonperturbative HQET at Order 1/m

TL;DR

This paper uses nonperturbative HQET with order 1/m corrections and the GEVP method to accurately compute masses and decay constants of bottom-strange mesons, approaching the continuum limit.

Contribution

It provides a detailed nonperturbative analysis of bottom-strange mesons including 1/m_b corrections using multiple lattice spacings and static actions.

Findings

Ground and excited state masses and decay constants obtained.

Continuum limit achieved with three lattice spacings.

Nonperturbative renormalization applied.

Abstract

We carry out a thorough analysis with the GEVP method to obtain ground-state and first-excited-state masses and decay constants of bottom-strange (pseudo-scalar and vector) mesons. This computation is done for quenched, nonperturbatively renormalized HQET, including order $1/m_b$ terms. The continuum limit is obtained using three lattice spacings and two static actions.