The nature of $Z_b$ states from a combined analysis of ${\rm Y}(5S)\to h_b(mP){\pi }^{+}{\pi }^{-}$ and ${\rm Y}(5S)\to B^{(\ast )}{\bar{B}}^{(\ast )}\pi$

Wen-Sheng Huo, Guo-Ying Chen

With a combined analysis of data on ${\rm Y}(5S)\to h_b(1P,2P){\pi }^{+}{\pi }^{-}$ and ${\rm Y}(5S)\to B^{(\ast )}{\bar{B}}^{(\ast )}\pi$ in an effective field theory approach, we determine resona…