Where is the \chi_{c0}(2P)?

TL;DR

This paper investigates the identification of the _{0}(2P) charmonium state, suggesting a candidate around 3840 MeV based on analysis of Belle and BaBar data, challenging previous assignments.

Contribution

It proposes a new candidate for the _{0}(2P) state at 3840 MeV, supported by experimental data analysis, providing insights into charmonium spectroscopy.

Findings

Indication of _{0}(2P) at 3840 MeV

Width of approximately 200 MeV for the candidate state

Challenges previous assignment of X(3915) to _{0}(2P)

Abstract

Although the analysis of the BaBar Collaboration prefers J^P=0^+ for the X(3915), it is difficult to assign the X(3915) to the \chi_{c0}(2P). We show that there is an indication of the \chi_{c0}(2P) with a mass around 3840 MeV and width of about 200 MeV in the Belle and BaBar data for \gamma \gamma --> D\bar D.