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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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Main Authors: Aaij, Roel (Author) , Piucci, Alessio (Author) , Berninghoff, Daniel (Author) , Bachmann, Sebastian (Author) , Stahl, Marian (Author) , Neubert, Sebastian (Author) , Dziewiecki, Michal (Author) , Kecke, Matthieu (Author) , Gerick, David (Author) , Mitzel, Dominik (Author) , Kopecná, Renata (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author) , Hu, Jiangqiao (Author) , Han, Xiaoxue (Author) , Skidmore, Nicola (Author) , Stemmle, Simon (Author) , Braun, Svende (Author) , Leverington, Blake (Author) , Hansmann-Menzemer, Stephanie (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: June 17, 2020
In: Journal of high energy physics
Year: 2020, Issue: 6
ISSN:1029-8479
DOI:10.1007/JHEP06(2020)110
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP06(2020)110
Verlag, lizenzpflichtig, Volltext: http://old.inspirehep.net/record/1792130/export/hlxe
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Author Notes:the LHCb collaboration
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Summary: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
Item Description: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
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP06(2020)110

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