Spectroscopy of higher bottomonia

TL;DR

This paper presents unquenched quark model calculations for higher bottomonium states, including mass spectra, continuum effects, and decay properties, comparing results with experimental data and other models.

Contribution

It introduces unquenched quark model predictions for bottomonium spectra with self-energy corrections and analyzes their impact on recently observed states.

Findings

Unquenched quark model predicts masses close to experimental $ ext{chi}_b(3P)$ states.

Continuum effects significantly influence the $ ext{chi}_b(3P)$ mass predictions.

Results include radiative and open-bottom decay widths for bottomonium states.

Abstract

In this contribution, we discuss our recent unquenched quark model results for the spectrum of $b \bar b$ mesons with self energy corrections, due to the coupling to the meson-meson continuum. Our unquenched quark model predictions for the masses of the recently discovered $\chi_b(3P)$ states are compared to those of a re-fit of Godfrey and Isgur's relativized quark model to the most recent experimental data. The possible importance of continuum effects in the $\chi_b(3P)$ states is discussed. Finally, we show our quark model results for the radiative decays of the $\chi_b(3P)$ system and the open-bottom decays of $b \bar b$ mesons.