NRQCD matrix elements in polarization of J/ψ produced from b decay

Sean P Fleming, Oscar F. Hernández, Ivan Maksymyk, Hélène Nadeau

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

We present the nonrelativistic QCD (NRQCD) prediction for the polarization of the J/ψ promptly produced in b→J/ψ+X, as well as the helicity-summed production rate. We propose that these observables can be of avail in measuring the three most important color-octet NRQCD matrix elements involved in J/ψ production. Anticipating the measurement of the polarization parameter α, we determine its expected range given current experimental bounds on the color-octet matrix elements. We find that the leading-order NRQCD prediction for the polarization parameter α is expected to lie in the range -0.33 to 0.05 whereas the color-singlet model prediction is -0.40±0.04.

Original languageEnglish (US)
Pages (from-to)4098-4104
Number of pages7
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume55
Issue number7
StatePublished - Apr 1 1997
Externally publishedYes

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Polarization
quantum chromodynamics
octets
Decay
color
decay
polarization
matrices
predictions
Prediction
Helicity
Range of data
Prediction Model
Color

ASJC Scopus subject areas

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

Cite this

NRQCD matrix elements in polarization of J/ψ produced from b decay. / Fleming, Sean P; Hernández, Oscar F.; Maksymyk, Ivan; Nadeau, Hélène.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 55, No. 7, 01.04.1997, p. 4098-4104.

Research output: Contribution to journalArticle

Fleming, Sean P ; Hernández, Oscar F. ; Maksymyk, Ivan ; Nadeau, Hélène. / NRQCD matrix elements in polarization of J/ψ produced from b decay. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 1997 ; Vol. 55, No. 7. pp. 4098-4104.
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