Measurement of the [lambda]0b → J/[psi][lambda] angular distribution and the [lambda]0b polarisation in pp collisions
This paper presents an analysis of the $ {\Lambda}_b^0 $→ J/ψΛ angular distribution and the transverse production polarisation of $ {\Lambda}_b^0 $ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integra...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 17, 2020
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| In: |
Journal of high energy physics
Year: 2020, Heft: 6 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2020)110 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP06(2020)110 Verlag, lizenzpflichtig, Volltext: http://old.inspirehep.net/record/1792130/export/hlxe |
| Verfasserangaben: | the LHCb collaboration |
| Zusammenfassung: | This paper presents an analysis of the $ {\Lambda}_b^0 $→ J/ψΛ angular distribution and the transverse production polarisation of $ {\Lambda}_b^0 $ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb$^{−1}$, collected with the LHCb experiment. The polarisation is determined in a fiducial region of $ {\Lambda}_b^0 $ transverse momentum and pseudorapidity of 1 < p$_{T}$< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with $ {\Lambda}_b^0 $ baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the Λ → pπ$^{−}$ decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.[graphic not available: see fulltext] This paper presents an analysis of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the transverse production polarisation of $\Lambda^0_b$ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb$^{-1}$, collected with the LHCb experiment. The polarisation is determined in a fiducial region of $\Lambda^0_b$ transverse momentum and pseudorapidity of |
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| Beschreibung: | The LHCb collaboration: R. Aaij, A. Piucci, D. Berninghoff, S. Bachmann, S. Stahl, S. Neubert, M. Dziewiecki, M. Kecke, D. Gerick, D.S. Mitzel, R. Kopecna, U. Uwer, A. Zhelezov, J. Hu, X. Han, N. Skidmore, S. Stemmle, S. Braun, B. Leverington, M. Stahl, S. Hansmann-Menzemer [und viele weitere] Im Titel sind „lambda“ und „delta“ als griechische Buchstaben dargestellt Im Titel ist die Zahl "0" jeweils hochgestellt, "b" tiefgestellt Gesehen am 14.09.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2020)110 |