Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recent Spectroscopy Results from ZEUS   Recent results on light hadron spectroscopy are reported, with special
emphasis on the evidence for a narrow baryonic state decaying to Ks p and Ks
pbar, compatible with the pentaquark state theta^+ observed by fixed target
experiments. The data were collected with the ZEUS detector at HERA using an
integrated luminosity of 121 pb^-1. The analyses were performed in the central
rapidity region of inclusive deep inelastic scattering at an ep centre-of-mass
energy of 300-318 GeV. Evidence for a narrow resonance in the Ks p and Ks pbar
invariant mass spectrum is obtained, with mass 1521.5 \pm
1.5(stat)^{+2.8}_{-1.7}(syst) and width consistent with the experimental
resolution. If the Ks p part of the signal is identified with the strange
pentaquark theta^+, the Ks pbar part is the first evidence for its
antiparticle, thetabar^-. Supporting results on other light hadron resonances
are also discussed.

18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom