Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of pseudoscalar and tensor resonances in $J/\psi\rightarrow
  \gamma \phi \phi$   Based on a sample of $(1310.6 \pm 10.5) \times 10^{6}$ $J/\psi$ events
collected with the BESIII detector operating at the BEPCII storage ring, a
partial wave analysis of the decay $J/\psi\rightarrow \gamma \phi \phi$ is
performed in order to study the intermediate states. Results of the partial
wave analysis show that the structures are predominantly $0^{-+}$ states. The
existence of the $\eta(2225)$ is confirmed, and its resonance parameters are
measured. Two additional pseudoscalar states, the $\eta(2100)$ with a mass of
$2050_{-24}^{+30}{}_{-26}^{+75}$~MeV/$c^{2}$ and a width of
$250_{-30}^{+36}{}_{-164}^{+181}$~MeV/$c^{2}$ and the $X(2500)$ with a mass of
$2470_{-19}^{+15}{}_{-23}^{+101}$~MeV/$c^{2}$ and a width of
$230_{-35}^{+64}{}_{-33}^{+56}$~MeV/$c^{2}$, are observed. In addition to these
three pseudoscalar states, the scalar state $f_0(2100)$, and three tensor
states, the $f_2(2010)$, $f_2(2300)$ and $f_2(2340)$, are observed in the
process $J/\psi\rightarrow \gamma \phi\phi$. The product branching fractions
${\cal B}$($J/\psi\rightarrow \gamma X)\times{\cal B}(X\rightarrow \phi \phi)$
are reported.

18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin