First observation of the hadronic transition $\\Upsilon(4S) \\to \\eta h_{b}(1P)$ and new measurement of the $h_b(1P)$ and $\\eta_b(1S)$ parameters Authors: Date of Publication (YYYY-MM-DD): 2015 Title of Journal: Physical Review Letters Issue / Number: 115 Start Page: 142001 Document Type: Article ID: 716469.0