This paper presents an analysis of the Λ0b → J/ψ Λ 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 < p_T < 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 → p π− decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of the Λ0b → J/ψ Λ Angular Distribution and the Λ0b Polarisation in pp Collisions. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6), 0-29 [10.1007/JHEP06(2020)110].

Measurement of the Λ0b → J/ψ Λ Angular Distribution and the Λ0b Polarisation in pp Collisions

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Zucchelli, S.;
2020

Abstract

This paper presents an analysis of the Λ0b → J/ψ Λ 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 < p_T < 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 → p π− decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.
2020
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Measurement of the Λ0b → J/ψ Λ Angular Distribution and the Λ0b Polarisation in pp Collisions. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6), 0-29 [10.1007/JHEP06(2020)110].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/772386
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