Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: True Muonium $(\mu^+ \mu^-)$ on the Light Front   Applying Discretized Light Cone Quantization, we perform the first
calculation of the spectrum of true muonium, the $\mu^+ \mu^-$ atom, as
modified by the inclusion of an $|e\bar e >$ Fock component. The shift in the
mass eigenvalue is found to be largest for triplet states. If $m_e$ is taken to
be a substantial fraction of $m_\mu$, the integrated probability of the
electronic component of the $1 \, {}^3 /! S_1$ state is found to be as large as
$O(10^{-2})$. Initial studies of the Lamb shift for the atom are performed.
Directions for making the simulations fully realistic are discussed.

10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas