Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadron loops effect on mass shifts of the charmed and charmed-strange
  spectra   The hadron loop effect is conjectured to be important in understanding
discrepancies between the observed states in experiments and the theoretical
expectations of non-relativistic potential model. We present that, in an easily
operable procedure, the hadron loop effect could shift the poles downwards to
reduce the differences and provide better descriptions of both the masses and
the total widths, at least, of the radial quantum number $n=1$ charmed and
charmed-strange states. The $1^1P_1-1^3P_1$ mixing phenomena could be naturally
explained due to their couplings with common channels. The newly observed $D$
states are also addressed, but there are still some problems remaining unclear.

34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph