We present the nonrelativistic QCD (NRQCD) prediction for the polarization of the [Formula presented] promptly produced in [Formula presented], 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 [Formula presented] production. Anticipating the measurement of the polarization parameter [Formula presented], 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 [Formula presented] is expected to lie in the range [Formula presented] to 0.05 whereas the color-singlet model prediction is [Formula presented].
|Original language||English (US)|
|Number of pages||7|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 1997|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)