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X(3872),Xb, and theχb1(3P)state

Marek Karliner, Jonathan L. Rosner
2015 Physical Review D  
We discuss the possible production and discovery channels in $e^+e^-$ and $pp$ machines of the $X_b$, the bottomonium counterpart of $X(3872)$ and the putative isoscalar analogue of the charged bottomonium-like states $Z_b$ discovered by Belle. We suggest that the $X_b$ may be close in mass to the bottomonium state $\chi_{b1}(3P)$, mixing with it and sharing its decay channels, just as $X(3872)$ is likely a mixture of a $\bar D D^*$ molecule and $\chi_{c1}(2P)$. Consequently, the experiments
more » ... the experiments which reported observing $\chi_{b1}(3P)$ might have actually discovered the $X_b$, or a mixture of the two states.
doi:10.1103/physrevd.91.014014 fatcat:6d23j6qfrraznlkubgaf6v5xh4