Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meson Spectroscopy without Tetraquarks   Data on e+e- -> piplus-piminus-Upsilon(1S,2S,3S) show a large increase in
branching fractions near Upsilon(10860). A suggestion of Ali et al. is to
interpret this as evidence for a tetraquark, Yb(10890) = b-bbar. However, it
may also be interpreted in terms of Upsilon(10860) -> B-B*, B*B* and BsB*s
above the open-b threshold, followed by de-excitation processes such as $BB* ->
Upsilon (1S,2S,3S). In the charm sector, a hypothesis open to experimental test
is that X,Y and Z peaks in the mass range 3872 to 3945 MeV may all be due to
regular 3P1 and 3P2 c-cbar states (and perhaps 3P0) mixed with meson-meson.

30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
2
The categories of this paper are: math