Color-Octet $J/\psi$ Production in the ${\rm Y}$ Decay

Abstract

The direct production rate of $\psi$ in the ${\rm Y}$ decay is shown to be dominated by the process ${\rm Y}\to gg{g}^{\ast }$ followed by $g^{\ast }\to \psi$ via the color-octet mechanism proposed recently to explain the anomalous prompt charmonium production at the Tevatron. We show that this plausibly dominant process has a branching ratio compatible with the experimental data. Further experimental study in this channel is important to test the significance of the color-octet component of $c\bar{c}$ pair inside the $\psi$ system.

20 pages, Standard LaTeX, 2 figures; a couple of new processes added, but conclusion unchanged

References in corpus (17)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Color-octet quarkonia production
• Color-Octet Fragmentation and the psi' Surplus at the Tevatron
• Quarkonium Wave Functions at the Origin
• Gluon Fragmentation into Heavy Quarkonium
• Fragmentation production of J/psi and psi' at the Tevatron
• Measurement of the $B$ Meson Differential Cross Section, $d\sigma /d{p}_T$, in $p\bar{p}$ Collisions at $\sqrt{s}=1.8$ TeV
• Charmonium Production at the Tevatron
• J/psi Production via Fragmentation at the Tevatron
• Signature for Color-Octet Production of $J/\psi$ in $e^{+}{e}^{-}$ Annihilation
• Gluon Fragmentation into Spin-Triplet S-Wave Quarkonium
• Fragmentation contribution to quarkonium production in hadron collision
• Color-Octet Quarkonium Production at the $Z$ Pole
• Prompt Upsilon and Psi Production at LEP
• Inclusive $S-$wave charmonium productions in $B$ decays
• Color-Octet ${\psi }^{\prime }$ Production at Low $p_{\perp }$
• ${\rm Y}$ decay into charmonium and the color octet mechanism

Cited by in corpus (29)

• Measurement of $J/\psi$ production in continuum $e^{+}{e}^{-}$ annihilations near $\sqrt{s}=10.6$ GeV
• Flavor Changing processes in Quarkonium Decays
• Determination of the ${\Theta }^{+}$ parity from $\gamma n\to K^{-}{K}^{+}n$
• Recent Results in Bottomonium
• eta_c production at the Large Hadron Collider
• eta' meson production in proton-proton collisions
• New Measurements of Upsilon(1S) Decays to Charmonium Final States
• Probing for the Charm Content of $B$ and ${\rm Y}$ Mesons
• 1P1 charmonium production at the Tevatron
• Inclusive Charm Production in Upsilon(nS) Decay
• Color-Octet Contributions in the Associate J/psi+gamma Hadroproduction
• Lh_c
• Inclusive J/psi production in Upsilon decay via color-octet mechanisms
• 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
• Inclusive J/ψProduction In ΥDecay Via Color-singlet Mechanism
• Color-singlet J/psi production at alpha_s^6 in Upsilon decay
• Inclusive decays of ${\eta }_b$ into $S$- and $P$-wave charmonium states
• Remarks on CLEO New Measurements for Upsilon(1S) Decays to Charmonium Final States and Investigations on Associate Strange Particle Enhancement in Upsilon to J/Psi +X
• Relativistic corrections to the semi-inclusive decay of $\mathbf{\psi }$ and $\mathbf{{\rm Y}}$
• Predictions for $h_c$ and $h_b$ production at the LHC
• Invariant-mass distribution of cc-bar in Upsilon(1S) -> cc-bar + X
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Heavy Quarkonia Results from CLEO
• Color-Octet $\jpsi$ Production in ${\rm Y}$ Decay near the Kinematic Limit
• Inclusive $J/\psi$ and ${\eta }_c$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in nonrelativistic QCD factorization
• Inclusive ${\chi }_{cJ}$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in NRQCD factorization
• ${\rm Y}$ radiative decays to light quark jets and color octet mechanism
• QED Contribution to the Color-Singlet $\jpsi$ Production in ${\rm Y}$ Decay Near the Endpoint