Light 2++ and 0++ mesons

TL;DR

This paper reviews the classification of light I=0, J^{PC}=2^{++} and 0^{++} mesons, highlighting the separation of non-strange and strange quark states and clarifying the nature of specific mesons like f_2(1810).

Contribution

It proposes a simple scheme for classifying these mesons and clarifies the identity of f_2(1810) versus f_0(1790), suggesting further data can resolve this confusion.

Findings

Most light I=0, J^{PC}=2^{++} and 0^{++} mesons fit a simple classification scheme.

f_2(1810) is likely not the same as f_0(1790), contrary to previous assumptions.

Existing data can be used to clarify the meson identities.

Abstract

The status of light I=0, J^{PC}=2^{++} and 0^{++} mesons is discussed, particularly the separation of n-nbar and s-sbar states. They fall into a simple scheme except for f_2(1810). A case is made that this has been confused with the f_0(1790). It should be possible to check this with existing or forthcoming data.