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

TL;DR

This paper predicts sharp peak structures near certain thresholds in the dipion decays of $
1020$, proposing experimental searches to test the Initial Single Pion Emission mechanism in bottomonium states.

Contribution

It introduces a theoretical prediction of charged bottomonium-like structures in specific decay channels of $
1020$, providing testable signals for the ISPE mechanism.

Findings

Sharp peak structures near $Bar{B}^*$ and $B^*ar{B}^*$ thresholds

Predictions for invariant mass spectrum distributions

Guidance for future experimental searches

Abstract

Under the Initial Single Pion Emission mechanism, we study the hidden-bottom dipion decays of $\Upsilon(11020)$, i.e., $\Upsilon(11020)\to \Upsilon(nS)\pi^+\pi^-$ $(n=1,2,3)$ and $\Upsilon(11020)\to h_b(mP)\pi^+\pi^-$ $(m=1,2)$. We predict explicit sharp peak structures close to the $B\bar{B}^*$ and $B^*\bar{B}^*$ thresholds and their reflections in the $\Upsilon(1S)\pi^+$, $\Upsilon(2S)\pi^+$ and $h_b(1P)\pi^+$ 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.