Polarization of prompt J/ψ at the Fermilab Tevatron

Eric Braaten, Bernd A. Kniehl, Jungil Lee

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Abstract

The polarization of prompt J/ψ at the Fermilab Tevatron is calculated within the nonrelativistic QCD factorization framework. The contribution from radiative decays of P-wave charmonium states decreases, but does not eliminate, the transverse polarization at large transverse momentum. The angular distribution parameter α for leptonic decays of the J/ψ is predicted to increase from near 0 at pT=5 GeV to about 0.5 at pT = 20 GeV. The prediction is consistent with measurements by the CDF Collaboration at intermediate values of pT, but disagrees by about 3 standard deviations at the largest values of pT measured.

Original languageEnglish
Article number094005
Pages (from-to)1-4
Number of pages4
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume62
Issue number9
Publication statusPublished - 2000 Nov 1
Externally publishedYes

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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