Naslov
Observation of B-0 ->psi(2S)K-S(0)pi(+)pi(-) and B-s(0)->psi(2S)K-S(0) decays
(Observation of B$^0$ $\to$ $ψ$(2S)K$^0_\mathrm{;;;S};;;π^+π^-$ and B$^0_\mathrm{;;;S};;;$ $\to$ $ψ$(2S)K$^0_\mathrm{;;;S};;;$ decays)

Autori
Tumasyan, Armen ; ... ; Antunović, Željko ; Brigljević, Vuko ; Ferenček, Dinko ; Giljanović, Duje ; Godinović, Nikola ; Kovač, Marko ; Lelas, Damir ; Majumder, Devdatta ; Puljak, Ivica ; Roguljić, Matej ; Starodumov, Andrey ; Đurić, Senka ; Šuša, Tatjana ; Šćulac, Toni ; ... ; Vetens, Wren

Kolaboracija
CMS Collaboration

Izvornik
European physical journal C : particles and fields (1434-6044) 82 (2022); 499, 34

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
High energy physics ; Experimental particle physics ; LHC ; CMS ; p p: scattering ; p p: colliding beams ; B: decay ; tau: hadronic decay ; interaction: gauge ; interaction: model ; transverse momentum: missing-energy ; new physics: search for ; mass spectrum: transverse ; black hole: quantum ; vector boson: mass ; W': leptonic decay ; sensitivity ; leptoquark: coupling ; CERN LHC Coll ; leptoquark: mass: lower limit ; anomaly ; channel cross section: upper limit ; effective field theory ; Higgs

Sažetak
Using a data sample of $\sqrt{; ; ; s}; ; ; =$ 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}; ; ; $, the B$^0$ $\to$ $\psi$(2S)K$^0_\mathrm{; ; ; S}; ; ; $ and B$^0_\mathrm{; ; ; S}; ; ; $ $\to$ $\psi$(2S)K$^0_\mathrm{; ; ; S}; ; ; \pi^+\pi^-$ decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to $\mathcal{; ; ; B}; ; ; $(B$^0_\mathrm{; ; ; S}; ; ; $ $\to$ $\psi$(2S)K$^0_\mathrm{; ; ; S}; ; ; $) / $\mathcal{; ; ; B}; ; ; $(B$^0$ $\to$ $\psi$(2S)K$^0_\mathrm{; ; ; S}; ; ; $) = (3.33 $\pm$ 0.69 (stat) $\pm$ 0.11 (syst) $\pm$ 0.34 ($f_\mathrm{; ; ; s}; ; ; / f_\mathrm{; ; ; d}; ; ; $)) $\times$ 10$^{; ; ; -2}; ; ; $ and $\mathcal{; ; ; B}; ; ; $(B$^0$ $\to$ $\psi$(2S)K$^0_\mathrm{; ; ; S}; ; ; \pi^+\pi^-$) / $\mathcal{; ; ; B}; ; ; $(B$^0$ $\to$ $\psi$(2S)K$^0_\mathrm{; ; ; S}; ; ; $) = 0.480 $\pm$ 0.013 (stat) $\pm$ 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$^0_\mathrm{; ; ; s}; ; ; $ and B$^0$ mesons, $f_\mathrm{; ; ; s}; ; ; / f_\mathrm{; ; ; d}; ; ; $.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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