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Observation of B<sup>0</sup> → ψ(2S)K<sup>0</sup><inf>S</inf>π<sup>+</sup>π<sup>−</sup> and B<sup>0</sup><inf>S</inf> → ψ(2S)K<sup>0</sup><inf>S</inf> decays
Journal
European Physical Journal C
ISSN
14346044
Date Issued
2022-05-01
Author(s)
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Dragicevic, M.
Valle, A. Escalante Del
Frühwirth, R.
Jeitler, M.
Krammer, N.
Lechner, L.
Liko, D.
Mikulec, I.
Paulitsch, P.
Pitters, F. M.
Schieck, J.
Schöfbeck, R.
Schwarz, D.
Templ, S.
Waltenberger, W.
Wulz, C. E.
Chekhovsky, V.
Litomin, A.
Makarenko, V.
Darwish, M. R.
De Wolf, E. A.
Janssen, T.
Kello, T.
Lelek, A.
Sfar, H. Rejeb
Mechelen, P. Van
Putte, S. Van
Remortel, N. Van
Bols, E. S.
D’Hondt, J.
De Moor, A.
Delcourt, M.
Faham, H. El
Lowette, S.
Moortgat, S.
Morton, A.
Müller, D.
Sahasransu, A. R.
Tavernier, S.
Doninck, W. Van
Vannerom, D.
Beghin, D.
Bilin, B.
Clerbaux, B.
De Lentdecker, G.
Favart, L.
Kalsi, A. K.
Lee, K.
Mahdavikhorrami, M.
Makarenko, I.
Moureaux, L.
Paredes, S.
Pétré, L.
Popov, A.
Postiau, N.
Starling, E.
Thomas, L.
Bemden, M. Vanden
Velde, C. Vander
Vanlaer, P.
Cornelis, T.
Dobur, D.
Knolle, J.
Lambrecht, L.
Mestdach, G.
Niedziela, M.
Rendón, C.
Roskas, C.
Samalan, A.
Skovpen, K.
Tytgat, M.
Vermassen, B.
Wezenbeek, L.
Benecke, A.
Bethani, A.
Bruno, G.
Bury, F.
Caputo, C.
David, P.
Delaere, C.
Donertas, I. S.
Giammanco, A.
Jaffel, K.
Jain, Sa
Lemaitre, V.
Mondal, K.
Prisciandaro, J.
Taliercio, A.
Teklishyn, M.
Tran, T. T.
Vischia, P.
Wertz, S.
Alves, G. A.
Hensel, C.
Abstract
Using a data sample of s=13TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103fb-1, the Bs0→ψ(2S)KS0 and B0→ψ(2S)KS0π+π- decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B(Bs0→ψ(2S)KS0)/B(B0→ψ(2S)KS0)=(3.33±0.69(stat)±0.11(syst)±0.34(fs/fd))×10-2 and B(B0→ψ(2S)KS0π+π-)/B(B0→ψ(2S)KS0)=0.480±0.013(stat)±0.032(syst), where the last uncertainty in the first ratio is related to the uncertainty in the ratio of production cross sections of Bs0 and B mesons, fs/ fd.