Evidence for the eta_b(2S) and observation of h_b(1P) -> eta_b(1S) gamma and h_b(2P) -> eta_b(1S) gamma

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Comparing to Ref. [ 7 ] , the Z b Z_{b} requirement changed the shape of the combinatorial background. Therefore, the polynomial order was modified to obtain the highest C.L. The h b ( 1 P ) h_{b}(1P) and h b ( 2 P ) h_{b}(2P) regions are described, respectively, by a 3rd order and 8th order Chebyshev polynomial instead of a 5th and 7th order. In addition, the fit interval is reduced by decreasing the end point from 10.45 GeV / c 2 10.45\,\mathrm{GeV}/c^{2} to 10.40 GeV / c 2 10.40\,\mathrm{GeV}/c^{2}
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