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Measurement of the Λ0b→ J/ψΛ angular distribution and the Λ0b polarisation in pp collisions
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LHCb collaboration (Including: Back, J. J., Blake, T., Brossa Gonzalo, A., Cicala, M. F., Costa Sobral, C. M. , Crocombe, A., Gershon, T. J., Hunter, R. J., Kenzie, M., Kreps, Michal, Latham, Thomas, Loh, David, Lupton, Oliver, Millard, E., Morris, A. G. (Alan George), Sahoo, Niladri and Vesterinen, Mikael Anton). (2020) Measurement of the Λ0b→ J/ψΛ angular distribution and the Λ0b polarisation in pp collisions. Journal of High Energy Physics, 2020 . 110. doi:10.1007/JHEP06(2020)110
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Official URL: https://doi.org/10.1007/JHEP06(2020)110
Abstract
This paper presents an analysis of the Λ0b→ J/ψΛ angular distribution and the transverse production polarisation of Λ0b 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 Λ0b transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λ0b 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.
| Item Type: | Journal Article | |||||||||||||||||||||
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| Subjects: | Q Science > QC Physics | |||||||||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Particles (Nuclear physics) -- Flavor , Quarks , Hadrons -- Scattering , Polarization (Nuclear physics) | |||||||||||||||||||||
| Journal or Publication Title: | Journal of High Energy Physics | |||||||||||||||||||||
| Publisher: | Springer | |||||||||||||||||||||
| ISSN: | 1029-8479 | |||||||||||||||||||||
| Official Date: | 17 June 2020 | |||||||||||||||||||||
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| Volume: | 2020 | |||||||||||||||||||||
| Article Number: | 110 | |||||||||||||||||||||
| DOI: | 10.1007/JHEP06(2020)110 | |||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||
| Access rights to Published version: | Open Access | |||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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