Observation of the decay Λ0b→ψ(2S)pπ−
The Cabibbo-suppressed decay Λ b 0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
August 21, 2018
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| In: |
Journal of high energy physics
Year: 2018, Heft: 8 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP08(2018)131 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1007/JHEP08(2018)131
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| Verfasserangaben: | the LHCb collaboration |
MARC
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| 245 | 1 | 0 | |a Observation of the decay Λ0b→ψ(2S)pπ− |c the LHCb collaboration |
| 246 | 3 | 0 | |a Λ , ψ |
| 246 | 3 | 3 | |a Observation of the decay lambda 0 b → psi (2S) p pi minus |
| 264 | 1 | |c August 21, 2018 | |
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| 500 | |a Im Titel werden "lambda" und "psi" als griechische Buchstaben dargestellt | ||
| 500 | |a Im Titel sind "0" und "b" untereinander geschrieben: "0" hochgestellt, "b" tiefgestellt | ||
| 500 | |a The LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, F. Dordei, S. Esen, D. Gerick, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, A. Piucci, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, A. Zhelezov [und weitere] | ||
| 500 | |a Gesehen am 28.05.2019 | ||
| 520 | |a The Cabibbo-suppressed decay Λ b 0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ− final state. The branching fraction with respect to that of the Λ b 0 → ψ(2S)pK− decay mode is measured to be B(Λ0b→ψ(2S)pπ−)B(Λ0b→ψ(2S)pK−)=(11.4±1.3±0.2)%,B(Λb0→ψ(2S)pπ−)B(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%, \frac{\mathrm{\mathcal{B}}\left({\Lambda}_{\mathrm{b}}^0\to \uppsi \left(2\mathrm{S}\right){\mathrm{p}\uppi}^{-}\right)}{\mathrm{\mathcal{B}}\left({\Lambda}_{\mathrm{b}}^0\to \uppsi \left(2\mathrm{S}\right){\mathrm{p}\mathrm{K}}^{-}\right)}=\left(11.4\pm 1.3\pm 0.2\right)\%, where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π− mass spectra are investigated and no evidence for exotic resonances is found. Open image in new window | ||
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