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Charged bottomonium-like structures in the hidden-bottom dipion decays of $Υ(11020)$

Under the Initial Single Pion Emission mechanism, we study the hidden-bottom dipion decays of $Υ(11020)$, i.e., $Υ(11020)\to Υ(nS)π^+π^-$ $(n=1,2,3)$ and $Υ(11020)\to h_b(mP)π^+π^-$ $(m=1,2)$. We predict explicit sharp peak structures close to the $B\bar{B}^*$ and $B^*\bar{B}^*$ thresholds and their reflections in the $Υ(1S)π^+$, $Υ(2S)π^+$ and $h_b(1P)π^+$ invariant mass spectrum distributions. We suggest future experiment, i.e., Belle, BaBar, and forthcoming BelleII or Super-B, carry out the search for these novel phenomena, which can provide important test to the Initial Single Emission mechanism existing in higher bottomonia.