The transverse polarization of Λ and Λbar hyperons is measured in pPb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The polarization is averaged over hyperon transverse momentum in the range 0.15 < pT < 6.00 GeV=c, and Feynman-x in the ranges 0.005 < xF < 0.040 (forward region) and −0.10 < xF < −0.01 (backward region) defined relative to the proton beam direction. The transverse polarization is found to be compatible with zero for both Λ and Λ̄ hyperons. The results are also measured as a function of pT and xF with no significant dependence on these variables observed. The results are compared with previous experimental measurements at different center-of-mass energies and collision environments.

Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Measurement of transverse Λ and Λbar hyperon polarization in pPb collisions at sqrt(sNN) = 5.02 TeV. PHYSICAL REVIEW D, 112(11), 1-15 [10.1103/rc6r-zt9q].

Measurement of transverse Λ and Λbar hyperon polarization in pPb collisions at sqrt(sNN) = 5.02 TeV

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Falcao L. N.;Fazzini D.;Gotti C.;Kirsebom V. S.;Malentacca L.;Martinazzoli L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;
2025

Abstract

The transverse polarization of Λ and Λbar hyperons is measured in pPb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The polarization is averaged over hyperon transverse momentum in the range 0.15 < pT < 6.00 GeV=c, and Feynman-x in the ranges 0.005 < xF < 0.040 (forward region) and −0.10 < xF < −0.01 (backward region) defined relative to the proton beam direction. The transverse polarization is found to be compatible with zero for both Λ and Λ̄ hyperons. The results are also measured as a function of pT and xF with no significant dependence on these variables observed. The results are compared with previous experimental measurements at different center-of-mass energies and collision environments.
Articolo in rivista - Articolo scientifico
Astronomy &amp; Astrophysics; Physics
English
24-dic-2025
2025
112
11
1
15
112022
none
Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Measurement of transverse Λ and Λbar hyperon polarization in pPb collisions at sqrt(sNN) = 5.02 TeV. PHYSICAL REVIEW D, 112(11), 1-15 [10.1103/rc6r-zt9q].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/616235
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