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.]

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6) [10.1007/JHEP06(2020)110].

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

Borsato M.;Calvi M.;Carniti P.;Fazzini D.;Gotti C.;Martinazzoli L.;Martinelli M.;Meloni S.;Petruzzo M.;
2020

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.]
Articolo in rivista - Articolo scientifico
B physics; Flavor physics; Hadron-Hadron scattering (experiments); Heavy quark production; Polarization
English
2020
2020
6
110
open
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6) [10.1007/JHEP06(2020)110].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/289364
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