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Towards the experimental clarification of quarkonium polarization
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2010
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-010-1420-5 http://cds.cern.ch/record/1279370 |
| _version_ | 1780920428728942592 |
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| author | Faccioli, Pietro Lourenco, Carlos Seixas, Joao Wohri, Hermine K |
| author_facet | Faccioli, Pietro Lourenco, Carlos Seixas, Joao Wohri, Hermine K |
| author_sort | Faccioli, Pietro |
| collection | CERN |
| description | |
| id | cern-1279370 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2010 |
| record_format | invenio |
| spelling | cern-12793702019-09-30T06:29:59Zdoi:10.1140/epjc/s10052-010-1420-5http://cds.cern.ch/record/1279370engFaccioli, PietroLourenco, CarlosSeixas, JoaoWohri, Hermine KTowards the experimental clarification of quarkonium polarizationParticle Physics - PhenomenologyParticle Physics - PhenomenologyWe highlight issues which are often underestimated in the experimental analyses on quarkonium polarization: the relation between the parameters of the angular distributions and the angular momentum composition of the quarkonium, the importance of the choice of the reference frame, the interplay between observed decay and production kinematics, and the consequent influence of the experimental acceptance on the comparison between experimental measurements and theoretical calculations. Given the puzzles raised by the available experimental results, new measurements must provide more detailed information, such that physical conclusions can be derived without relying on model-dependent assumptions. We describe a frame invariant formalism which minimizes the dependence of the measurements on the experimental acceptance, facilitates the comparison with theoretical calculations, and probes systematic effects due to experimental biases. This formalism is a direct and generic consequence of the rotational invariance of the dilepton decay distribution and is independent of any assumptions specific to particular models of quarkonium production. The use of this improved approach, which exploits the intrinsic multidimensionality of the problem, will significantly contribute to a faster progress in our understanding of quarkonium production, especially if adopted as a common analysis framework by the LHC experiments, which will soon perform a nalyses of quarkonium polarization in proton-proton collisions.arXiv:1006.2738CERN-PH-EP-2010-022oai:cds.cern.ch:12793702010-06-13 |
| spellingShingle | Particle Physics - Phenomenology Particle Physics - Phenomenology Faccioli, Pietro Lourenco, Carlos Seixas, Joao Wohri, Hermine K Towards the experimental clarification of quarkonium polarization |
| title | Towards the experimental clarification of quarkonium polarization |
| title_full | Towards the experimental clarification of quarkonium polarization |
| title_fullStr | Towards the experimental clarification of quarkonium polarization |
| title_full_unstemmed | Towards the experimental clarification of quarkonium polarization |
| title_short | Towards the experimental clarification of quarkonium polarization |
| title_sort | towards the experimental clarification of quarkonium polarization |
| topic | Particle Physics - Phenomenology Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1140/epjc/s10052-010-1420-5 http://cds.cern.ch/record/1279370 |
| work_keys_str_mv | AT facciolipietro towardstheexperimentalclarificationofquarkoniumpolarization AT lourencocarlos towardstheexperimentalclarificationofquarkoniumpolarization AT seixasjoao towardstheexperimentalclarificationofquarkoniumpolarization AT wohriherminek towardstheexperimentalclarificationofquarkoniumpolarization |