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Radial excitations of mesons and nucleons from QCD sum rules

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arxiv 1508.00677 v3 pith:7LZCZOAY submitted 2015-08-04 hep-ph

Radial excitations of mesons and nucleons from QCD sum rules

classification hep-ph
keywords radialexcitationsfirstmesonsruleschiralconsequenceconsistent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

Within the framework QCD sum rules, we use the least square fitting method to investigate the first radial excitations of the nucleon and light mesons such as $\rho$, $K^{*}$, $\pi$ , $\varphi$. The extracted masses of these radial excitations are consistent with the experimental data. Especially we find that the decay constant of $\pi(1300)$, which is the the first radial excitation of $\pi$, is tiny and strongly suppressed as a consequence of chiral symmetry.

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