Quantum electrodynamics for vector mesons

Details Quantum electrodynamics for vector mesons Quantum electrodynamics for vector mesons

2005-05-20

arxiv.org/abs/hep-ph/0505180v1

Phys.Rev.Lett. 95 (2005) 012001

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, REVTeX 4, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.95.012001

Quantum electrodynamics for $\rho$ mesons is considered. It is shown that, at tree level, the value of the gyromagnetic ratio of the $\rho^+$ is fixed to 2 in a self-consistent effective quantum field theory. Further, the mixing parameter of the photon and the neutral vector meson is equal to the ratio of electromagnetic and strong couplings, leading to the mass difference $M_{\rho^0}-M_{\rho^\pm}\sim 1 {\rm MeV}$ at tree order.

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