On the mass and the decay constant of recently observed bound state $h_b(1P)$

TL;DR

This paper calculates the mass and decay constant of the $h_b(1P)$ meson using QCD sum rules, finding results consistent with recent experimental measurements by Belle.

Contribution

It provides a theoretical calculation of the $h_b(1P)$ meson's properties using QCD sum rules, aligning with experimental data.

Findings

Mass of $h_b(1P)$ meson: 9940 ± 37 MeV

Decay constant calculated (value not specified)

Results agree with Belle experimental data

Abstract

The mass and decay constant of the ground state of spin singlet $b \bar{b}$ is calculated by using the QCD sum rules method. This meson is an axial vector $P$-wave named $h_b(1P)$ meson with $J^P =1^+$. It is found that the mass of this meson is $(m=9940\pm 37)$ MeV, which is consistent with the recent experimental data by Belle collaboration.