𝑋(1870) and 𝜂₂(1870): Which Can Be Assigned as a Hybrid State?

Table 2

The masses predicted for 3¹𝑆₀(𝜂^′), 2³𝑃₁(𝜂^′), 1¹𝐷₂(𝜂^′), and 2¹𝐷₂(𝜂) in [20, 25–27]. The value denoted by “^†” was predicted for the mass of isovector 2¹𝐷₂ state in [20].

States	𝜂^′(3^1𝑆0)	𝑓^′1(2^3𝑃1)	𝜂^′2(1^1𝐷2)	𝜂2(2^1𝐷2)
[20]	—	2030	1890	2130^†
[25]	2085	2016	1909	1960
[26]	2099	1988	1851	—
[27]	—	—	1853	1863