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Η' Decay To Π+Π-Π+Π−, Ehsan Jafari

Theses and Dissertations--Physics and Astronomy

With the use of chiral theory of mesons [1], [2] we evaluate the decay rate of η′ → π⁺π⁻π⁺π⁻. Our theoretical study of this problem is different from the previous theo- retical study [3] and our predicted result is in a good agreement with the experiment. In this chiral theory we evaluate Feynman diagrams up to one loop and the decay rate is calculated with the use of triangle and box diagrams. The ρ⁰ meson includes in both type of diagrams as a resonance state. Divergent integrals in the loop calculations …