Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The mass splitting among the isospin multiplets of light vector mesons   By including the strong isospin symmetry breaking effects and the
electromagnetic contributions between the pseudoscalar mesons, we calculate the
phase shifts of the $P$-wave $\pi\pi$ and $K\pi$ scattering up to
$\mathcal{O}(p^4)$ in the framework of the SU(3) chiral perturbation theory
(ChPT) and coupled channel inverse amplitude method. We re-fit the low energy
constants with the present meson-meson scattering data and derive the mass
differences for the charged and neutral iso-multiplets of $\rho$ and $K^{*}$.
Our results show that the mass difference between $\rho^\pm$ and $\rho^0$ is
very small while the mass difference between the charged and neutral $K^*$ can
reach a relatively large value of $m_{K^{*0}}-m_{K^{*+}}= 2.91^{+1.43}_{-1.41}$
MeV. This full one-loop ChPT calculation would shed some light towards a better
understanding of the long-standing puzzle about the $K^*$ mass splitting.

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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
2
The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: alg-geom