A search for a new charge -(1/3 quark has been carried out at the KEK e+e-Collider TRISTAN under the assumption of its photonic decay through a flavor-changing neutral current (FCNC). The observed number of multihadronic events with isolated photons is consistent with that expected from the known five quark flavors. Including the usual charged-current decays, limits on the absolute photonic branching ratio and FCNC processes were obtained.
|ジャーナル||Physical Review Letters|
|出版ステータス||Published - 1989|
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