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Title: Production of heavy quarkonia in hadronic experiments

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.
Authors:
; ;  [1]
  1. National Research Center Kurchatov Institute, Institute for High Energy Physics (Russian Federation)
Publication Date:
OSTI Identifier:
22471982
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 78; Journal Issue: 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; CHI B0-9860 MESONS; CHI B1-10255 MESONS; CHI B1-9890 MESONS; CHI0-3415 MESONS; CHI1-3510 MESONS; CHI2-3555 MESONS; COLOR MODEL; CROSS SECTIONS; P WAVES; PARTICLE PRODUCTION; QUANTUM CHROMODYNAMICS; S WAVES