K_L to π^+ π^- e^+ e^-

Details K_L to π^+ π^- e^+ e^- K_L to π^+ π^- e^+ e^-

1995-04-11

arxiv.org/abs/hep-ph/9504288v1

Phys.Rev.D52:5095,1995; Erratum-ibid.D53:2855,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 11 uuencoded figures included, uses harvmac, epsf and tables

Scientific paper

10.1103/PhysRevD.52.5095 10.1103

We calculate all of the form factors for the one-photon, $K_L \rightarrow \pi^+ \pi^- \gamma^* \rightarrow \pi^+ \pi^- e^+e^-$ contribution to the $K_L \rightarrow \pi^+ \pi^- e^+e^-$ decay amplitude at leading order in chiral perturbation theory. These form factors depend on one unknown constant that is a linear combination of coefficients of local ${\cal O}(p^4)$ operators in the chiral lagrangian for weak radiative kaon decay. We determine the differential rate for $\K$ and also the magnitude of two CP violating observables.

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