Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions

We emphasize the importance of performing polarization measurements in two " orthogonal " frames, such as the Collins-Soper and helicity frames. The present experimental results on J/ψ polarization, lacking in most cases such full information, need to be interpreted by means of assumptions...

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Detalles Bibliográficos
Autores principales: Faccioli, Pietro, Lourenço, Carlos, Seixas, João, Wöhri, Hermine K
Lenguaje:eng
Publicado: Science Wise Publ. 2009
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/2626983
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author Faccioli, Pietro
Lourenço, Carlos
Seixas, João
Wöhri, Hermine K
author_facet Faccioli, Pietro
Lourenço, Carlos
Seixas, João
Wöhri, Hermine K
author_sort Faccioli, Pietro
collection CERN
description We emphasize the importance of performing polarization measurements in two " orthogonal " frames, such as the Collins-Soper and helicity frames. The present experimental results on J/ψ polarization, lacking in most cases such full information, need to be interpreted by means of assumptions. Assuming, for example, that the natural polarization axis is along the direction of the relative motion of the colliding partons, the seemingly contradictory J/ψ polarization results reported by E866, HERA-B and CDF consistently imply that directly produced J/ψ's are longitudinally polarized at low momentum and transversely polarized at high momentum.
id oai-inspirehep.net-1677827
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
publisher Science Wise Publ.
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spelling oai-inspirehep.net-16778272019-09-30T06:29:59Zhttp://cds.cern.ch/record/2626983engFaccioli, PietroLourenço, CarlosSeixas, JoãoWöhri, Hermine KKinematic Dependence of J/ψ Polarization Measurements in Hadronic CollisionsParticle Physics - PhenomenologyWe emphasize the importance of performing polarization measurements in two " orthogonal " frames, such as the Collins-Soper and helicity frames. The present experimental results on J/ψ polarization, lacking in most cases such full information, need to be interpreted by means of assumptions. Assuming, for example, that the natural polarization axis is along the direction of the relative motion of the colliding partons, the seemingly contradictory J/ψ polarization results reported by E866, HERA-B and CDF consistently imply that directly produced J/ψ's are longitudinally polarized at low momentum and transversely polarized at high momentum.Science Wise Publ.oai:inspirehep.net:16778272009
spellingShingle Particle Physics - Phenomenology
Faccioli, Pietro
Lourenço, Carlos
Seixas, João
Wöhri, Hermine K
Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions
title Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions
title_full Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions
title_fullStr Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions
title_full_unstemmed Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions
title_short Kinematic Dependence of J/ψ Polarization Measurements in Hadronic Collisions
title_sort kinematic dependence of j/ψ polarization measurements in hadronic collisions
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/2626983
work_keys_str_mv AT facciolipietro kinematicdependenceofjpspolarizationmeasurementsinhadroniccollisions
AT lourencocarlos kinematicdependenceofjpspolarizationmeasurementsinhadroniccollisions
AT seixasjoao kinematicdependenceofjpspolarizationmeasurementsinhadroniccollisions
AT wohriherminek kinematicdependenceofjpspolarizationmeasurementsinhadroniccollisions

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