Polarized J/ψ production at CLEO

Seungwon Baek, Jungil Lee, H. S. Song, P. Ko

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Polarizations of the prompt -J/ψ's produced in the e +e - annihilation at CLEO energy (√s = 10.58 GeV) are considered in the framework of the nonrelativistic quantum chromodynamics (NRQCD) factorization formalism. We find that the J/ψ polarization has a strong dependence on the production mechanism. At CLEO energy, the most dominant J/ψ production mechanism throughout most of phase space is the color-singlet mechanism, e +e - → J/ψ + gg, for which J/ψ's are highly longitudinally polarized. On the other hand, the dominant J/ψ production mechanism at the upper endpoint of the J/ψ energy distribution is the color-octet process, e +e - → (cc̄) (8) + g, for which J/ψ's are almost unpolarized. Thus, the measurement of the polarization of the endpoint J/ψ's is another test of the color-octet mechanism and a constraint on the NRQCD matrix elements.

Original languageEnglish
Pages (from-to)97-101
Number of pages5
JournalJournal of the Korean Physical Society
Volume33
Issue number1
Publication statusPublished - 1998 Dec 1
Externally publishedYes

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octets
color
polarization
quantum chromodynamics
factorization
energy distribution
formalism
energy
matrices

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Baek, S., Lee, J., Song, H. S., & Ko, P. (1998). Polarized J/ψ production at CLEO. Journal of the Korean Physical Society, 33(1), 97-101.

Polarized J/ψ production at CLEO. / Baek, Seungwon; Lee, Jungil; Song, H. S.; Ko, P.

In: Journal of the Korean Physical Society, Vol. 33, No. 1, 01.12.1998, p. 97-101.

Research output: Contribution to journalArticle

Baek, S, Lee, J, Song, HS & Ko, P 1998, 'Polarized J/ψ production at CLEO', Journal of the Korean Physical Society, vol. 33, no. 1, pp. 97-101.
Baek, Seungwon ; Lee, Jungil ; Song, H. S. ; Ko, P. / Polarized J/ψ production at CLEO. In: Journal of the Korean Physical Society. 1998 ; Vol. 33, No. 1. pp. 97-101.
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