${\rm Y}$ decay into charmonium and the color octet mechanism

Abstract

A factorization theorem for $P$-wave quarkonium production, recently derived by Bodwin, Braaten, Yuan and Lepage, is applied to ${\rm Y}\to {\chi }_{cJ}+X$, where ${\chi }_{cJ}$ labels the ${}^3{P}_J$ charmonium states. The widths for ${\chi }_{cJ}$ production through color-singlet $P$-wave and color-octet $S$-wave $c\bar{c}$ subprocesses are computed each to leading order in ${\alpha }_s$. Experimental data on ${\rm Y}\to J/\psi +X$ is used to obtain an upper bound on a nonperturbative parameter (related to the probability for color-octet $S$-wave $c\bar{c}$ hadronization into $P$-wave charmonium) that enters into the factorization theorem. The bound obtained here adds to the limited information so far available on the color-octet mechanism for $P$-wave quarkonium production.

13 Pages (regular LaTeX document). Includes three postscript figures

References in corpus (2)

• Rigorous QCD Predictions for Decays of P-Wave Quarkonia
• P-Wave Charmonium Production in B-Meson Decays

Cited by in corpus (16)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Fragmentation production of J/psi and psi' at the Tevatron
• Production of Heavy Quarkonium in High Energy Colliders
• Gluon Fragmentation into P-wave Heavy Quarkonium
• Color-Octet $J/\psi$ Production in the ${\rm Y}$ Decay
• New Measurements of Upsilon(1S) Decays to Charmonium Final States
• Inclusive J/psi production in Upsilon decay via color-octet mechanisms
• Measurement of ${\chi }_{cJ}$ decaying into $p\bar{n}{\pi }^{-}$ and $p\bar{n}{\pi }^{-}{\pi }^0$
• Contribution of Colour-singlet Process ${\rm Y}\to J/\Psi +c\bar{c}g$ to ${\rm Y}\to J/\Psi +X$
• Breakdown of NRQCD Factorization in Processes Involving Two Quarkonia and its Cure
• Measurement of hybrid content of heavy quarkonia using lattice NRQCD
• Inclusive J/ψProduction In ΥDecay Via Color-singlet Mechanism
• Searching for $B_c$ mesons in the ATLAS experiment at LHC
• Color-singlet J/psi production at alpha_s^6 in Upsilon decay
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Inclusive ${\chi }_{cJ}$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in NRQCD factorization