Production of heavy quarkonia in hadronic experiments
- National Research Center Kurchatov Institute, Institute for High Energy Physics (Russian Federation)
The phenomenology of the production of P-wave χ{sub c,b} mesons and S-wave η{sub c,b} mesons in highenergy hadron–hadron collisions was studied on the basis of nonrelativistic quantum chromodynamics (NRQCD). Available experimental data on χ{sub c}-meson production were analyzed, and nonperturbative NRQCDmatrix elements were determined from a fit to these data. It is shown that the observed transversemomentum (pT) spectrum of χ{sub c} mesons is basically formed by color-singlet contributions. At the same time, the ratio σ(χ{sub c2})/σ(χ{sub c1}) depends greatly on color-octet contributions; this ratio therefore becomes a highly sensitive tool for separating different NRQCD contributions. Predictions for χ{sub b}-meson production are obtained on the basis of NRQCD scaling rules. For the case of η{sub c}-meson production, it is shown that the observed cross sections agree with the color-singlet model featuring phenomenological parameters.
- OSTI ID:
- 22471982
- Journal Information:
- Physics of Atomic Nuclei, Vol. 78, Issue 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
Similar Records
Color-octet contributions to P-wave B{sub c} meson hadroproduction
QCD radiative correction to color-octet J/{psi} inclusive production at B factories