Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic Mass Difference of Heavy Mesons   Using the Cottingham formula, we give an estimate of the electromagnetic mass
splitting of pseudoscalar heavy mesons in the beauty and charm sector. We
include in the dispersion relation the Born term, the $1^-$ resonance and the
positive parity $1^+$ resonance. We also evaluate the contribution to the mass
difference from the isospin breaking quark mass differences. Our results:
$m_{B^+}-m_{B^0} = - 0.83\pm 0.34 MeV$ and $m_{D^+}-m_{D^0} = + 4.33\pm 0.37
MeV$, are in agreement with the experimental measurements: $m_{B^+}-m_{B^0} = -
0.35\pm 0.29 MeV$ and $m_{D^+}-m_{D^0} = + 4.78\pm 0.10 MeV$. We also compute
the mass differences in the infinite heavy quark mass limit, which show small
deviations from the finite mass results for the B case and 30% effects in the
charm case.

26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph