Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions

The Lhcb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

This paper presents an analysis of the Λb0→ J/ψΛ angular distribution and the transverse production polarisation of Λb0 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 Λb0 transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb0 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. [Figure not available: see fulltext.]

Original languageEnglish
Article number110
Pages (from-to)1-30
Number of pages30
JournalJournal of High Energy Physics
Volume2020
Issue number6
Early online date17 Jun 2020
DOIs
Publication statusPublished - Jun 2020

Funding

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

FundersFunder number
Creative Commons Attribution License
Horizon 2020 Framework Programme792684

    Keywords

    • B physics
    • Flavor physics
    • Hadron-Hadron scattering (experiments)
    • Heavy quark production
    • Polarization

    Fingerprint

    Dive into the research topics of 'Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions'. Together they form a unique fingerprint.

    Cite this