학술논문
Observation of B0→ψ(2S)KS0π+π- and Bs0→ψ(2S)KS0 decays
Document Type
article
Author
Tumasyan, A; Adam, W; Andrejkovic, JW; 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, FM; Schieck, J; Schöfbeck, R; Schwarz, D; Templ, S; Waltenberger, W; Wulz, C-E; Chekhovsky, V; Litomin, A; Makarenko, V; Darwish, MR; De Wolf, EA; Janssen, T; Kello, T; Lelek, A; Sfar, H Rejeb; Mechelen, P Van; Putte, S Van; Remortel, N Van; Bols, ES; D’Hondt, J; De Moor, A; Delcourt, M; Faham, H El; Lowette, S; Moortgat, S; Morton, A; Müller, D; Sahasransu, AR; Tavernier, S; Doninck, W Van; Vannerom, D; Beghin, D; Bilin, B; Clerbaux, B; De Lentdecker, G; Favart, L; Kalsi, AK; 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, IS; Giammanco, A; Jaffel, K; Jain, Sa; Lemaitre, V; Mondal, K; Prisciandaro, J; Taliercio, A; Teklishyn, M; Tran, TT; Vischia, P; Wertz, S; Alves, GA; Hensel, C
Source
European Physical Journal C. 82(5)
Subject
Language
Abstract
Using a data sample of s = 13 TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103 fb - 1 , the B s 0 → ψ ( 2S ) K S 0 and B 0 → ψ ( 2S ) K S 0 π + π - decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B ( B s 0 → ψ ( 2S ) K S 0 ) / B ( B 0 → ψ ( 2S ) K S 0 ) = ( 3.33 ± 0.69 ( stat ) ± 0.11 ( syst ) ± 0.34 ( f s / f d ) ) × 10 - 2 and B ( B 0 → ψ ( 2S ) K S 0 π + π - ) / B ( B 0 → ψ ( 2S ) K S 0 ) = 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 B s 0 and B 0 mesons, f s / f d .