Structure of Radiative Interferences and G=2 for Vector Mesons
نویسندگان
چکیده
The result by Burnett-Kroll (BK) states that for radiative decays the interference of O(ω −1) in the photon energy ω, vanishes after sum over polarizations of the involved particles. Using radiative decays of vector mesons we show that if the vector meson is polarized the O(ω −1) terms are null only for the canonical value of the magnetic dipole moment of the vector meson, namely g = 2 in Bohr's magneton units. A subtle cancellation of all O(ω −1) terms happens when summing over all polarizations to recover the Burnett-Kroll result. We also show the source of these terms and the corresponding cancellation for the unpolarized case and exhibit a global structure that can make them individually vanish in a particular kinematical region.
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