Comment on "Observation of a New chi_b State in Radiative Transitions to Upsilon_1S and Upsilon_2S at ATLAS"

TL;DR

This paper critiques the ATLAS Collaboration's interpretation of a new chi_b state, questioning their identification and the derived mass barycenter, emphasizing the need for careful analysis of experimental data.

Contribution

The authors provide a critical commentary challenging the ATLAS Collaboration's identification of a new chi_b state and their mass determination methods.

Findings

Question the identification of the chi_b(3P) state by ATLAS

Argue that the mass barycenter cannot be reliably determined from the data

Highlight the importance of cautious interpretation of experimental structures

Abstract

We comment on the recent observation of chi_b states by the ATLAS Collaboration and contest their peremptory interpretation of the highest of the three observed structures as the chi_b(3P) system. Moreover, we do not agree that from their data the mass barycenter of the chi_b(3P) system can be determined.