Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron

Transverse polarization of ${}^3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar an...

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Detalles Bibliográficos
Autores principales: Beneke, Martin, Krämer, Michael
Lenguaje:eng
Publicado: 1996
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.55.5269
http://cds.cern.ch/record/314075
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author Beneke, Martin
Krämer, Michael
author_facet Beneke, Martin
Krämer, Michael
author_sort Beneke, Martin
collection CERN
description Transverse polarization of ${}^3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p_t \sim 4 - 20 GeV, covered by the Tevatron Run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p_t \sim 5 GeV, but the angular distribution is predicted to change dramatically as p_t increases to 20 GeV.
id cern-314075
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3140752019-09-30T06:29:59Zdoi:10.1103/PhysRevD.55.5269http://cds.cern.ch/record/314075engBeneke, MartinKrämer, MichaelDirect J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab TevatronParticle Physics - PhenomenologyTransverse polarization of ${}^3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p_t \sim 4 - 20 GeV, covered by the Tevatron Run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p_t \sim 5 GeV, but the angular distribution is predicted to change dramatically as p_t increases to 20 GeV.Transverse polarization of ${}~3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p_t \sim 4 - 20 GeV, covered by the Tevatron Run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p_t \sim 5 GeV, but the angular distribution is predicted to change dramatically as p_t increases to 20 GeV.Transverse polarization of ${}~3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p_t \sim 4 - 20 GeV, covered by the Tevatron Run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p_t \sim 5 GeV, but the angular distribution is predicted to change dramatically as p_t increases to 20 GeV.Transverse polarization of ${}^3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p_t \sim 4 - 20 GeV, covered by the Tevatron Run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p_t \sim 5 GeV, but the angular distribution is predicted to change dramatically as p_t increases to 20 GeV.CERN-TH-96-310RAL-96-092hep-ph/9611218CERN-TH-96-310RAL-96-092oai:cds.cern.ch:3140751996-11-03
spellingShingle Particle Physics - Phenomenology
Beneke, Martin
Krämer, Michael
Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron
title Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron
title_full Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron
title_fullStr Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron
title_full_unstemmed Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron
title_short Direct J/$\psi$ and $\psi$' polarization and cross sections at the Fermilab Tevatron
title_sort direct j/$\psi$ and $\psi$' polarization and cross sections at the fermilab tevatron
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.55.5269
http://cds.cern.ch/record/314075
work_keys_str_mv AT benekemartin directjpsiandpsipolarizationandcrosssectionsatthefermilabtevatron
AT kramermichael directjpsiandpsipolarizationandcrosssectionsatthefermilabtevatron

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