The ϒ(nS) (n=1,2,5) Decays at Belle

The decays of bottomonia including ϒ(1S), ϒ(2S) and ϒ(5S) at Belle experiment are reviewed. For the ϒ(1S) radiative decays, the upper limits of branching ratios to charge-parity-even charmonia χcJ and ηc, and charmonium-like states X(3872), X(3915) and Y(4140) are measured. Some analyses on ϒ(2S) are underway, such as ϒ(2S)→γηb, ϒ(2S)→γA0, χbJ→ double charmonium. Transitions of ϒ(5S) to ϒ(nS)π+π− and ϒ(5S) decays to B mesons final states are also studied. The decays with B meson include BB¯, BB¯⁎+B⁎B¯, B⁎B¯⁎, BB¯π, BB⁎π+B⁎Bπ and B⁎B¯⁎π.