Study of the $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
| Popis: | 22 pp. (2021). A study of the $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays using 139 fb$^{-1}$ of integrated luminosity collected with the ATLAS detector from $\sqrt{s} = 13$ TeV $pp$ collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of $B_c^+\to J/\psi \pi^+$ decay channel are measured: $\mathcal B(B_c^+\to J/\psi D_s^+)/\mathcal B(B_c^+\to J/\psi \pi^+) = 2.76\pm 0.47$, $\mathcal B(B_c^+\to J/\psi D_s^{*+})/\mathcal B(B_c^+\to J/\psi \pi^+) = 5.33\pm 0.96$. The ratio between the branching fractions of the two decays is found to be $\mathcal B(B_c^+\to J/\psi D_s^{*+})/\mathcal B(B_c^+\to J/\psi D_s^+) = 1.93\pm0.26$. For the $B_c^+\to J/\psi D_s^{*+}$ decay, the transverse polarisation fraction, $\Gamma_{\pm\pm}/\Gamma$, is measured to be $0.70\pm0.11$. Here the uncertainty is a quadratic sum of statistical and systematic contributions. The precision of the measurements exceeds that of all previous studies of these decays. A comparison with available theoretical predictions for the measured quantities is presented. |
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| Jazyk: | English |
| DOI: | 10.3204/pubdb-2021-05318 |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24235f49585fd57c945fdd7443125217 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....24235f49585fd57c945fdd7443125217 |
| Autor: | ATLAS Collaboration |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
J/psi(3100)
p p: scattering branching ratio [B/c] transverse [polarization] 13000 GeV-cms D/s*(2110)+ B/c+ --> J/psi(3100) D/s*(2110)+ hadronic decay [B/c+] scattering [p p] polarization: transverse talk: online 2021/07/26 B/c+ --> J/psi(3100) D/s+ High Energy Physics::Phenomenology branching ratio: ratio: measured statistical [error] B/c+: hadronic decay ATLAS online 2021/07/26 [talk] error: statistical CERN LHC Coll High Energy Physics::Experiment colliding beams [p p] ratio: measured [branching ratio] p p: colliding beams D/s+ B/c: branching ratio experimental results |
| DOI: | 10.3204/pubdb-2021-05318 |
| Popis: | 22 pp. (2021). A study of the $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays using 139 fb$^{-1}$ of integrated luminosity collected with the ATLAS detector from $\sqrt{s} = 13$ TeV $pp$ collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of $B_c^+\to J/\psi \pi^+$ decay channel are measured: $\mathcal B(B_c^+\to J/\psi D_s^+)/\mathcal B(B_c^+\to J/\psi \pi^+) = 2.76\pm 0.47$, $\mathcal B(B_c^+\to J/\psi D_s^{*+})/\mathcal B(B_c^+\to J/\psi \pi^+) = 5.33\pm 0.96$. The ratio between the branching fractions of the two decays is found to be $\mathcal B(B_c^+\to J/\psi D_s^{*+})/\mathcal B(B_c^+\to J/\psi D_s^+) = 1.93\pm0.26$. For the $B_c^+\to J/\psi D_s^{*+}$ decay, the transverse polarisation fraction, $\Gamma_{\pm\pm}/\Gamma$, is measured to be $0.70\pm0.11$. Here the uncertainty is a quadratic sum of statistical and systematic contributions. The precision of the measurements exceeds that of all previous studies of these decays. A comparison with available theoretical predictions for the measured quantities is presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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