Effects of $Z_b$ states and bottom meson loops on $\Upsilon(4S) \to \Upsilon(1S,2S) \pi^+\pi^-$ transitions
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DOI: 10.1103/physrevd.95.034022
Abstract: We study the dipion transitions ϒ(4S)→ϒ(nS)π+π-(n=1,2). In particular, we consider the effects of the two intermediate bottomoniumlike exotic states Zb(10610) and Zb(10650) as well as bottom meson loops. The strong pion-pion final-state interactions, especially including… read more here.
Keywords: meson loops; states bottom; bottom meson; distribution ... See more keywords