Inclusive decays of ${\eta }_b$ into $S$- and $P$-wave charmonium states

Abstract

Inclusive S- and P-wave charmonium productions in the bottomonium ground state ${\eta }_b$ decay are calculated at the leading order in the strong coupling constant ${\alpha }_s$ and quarkonium internal relative velocity $v$ in the framework of the NRQCD factorization approach. We find the contribution of ${\eta }_b\to {\chi }_{c_J}+gg$ followed by ${\chi }_{c_J}\to J/\psi +\gamma$ is also very important to the inclusive $J/\psi$ production in the ${\eta }_b$ decays, which maybe helpful to the investigation of the color-octet mechanism in the inclusive $J/\psi$ production in the ${\eta }_b$ decays in the forthcoming LHCb and SuperB. As a complementary work, we also study the inclusive production of ${\eta }_c$, and ${\chi }_{cJ}$ in the ${\eta }_b$ decays, which may help us understand the X(3940) and X(3872) states.

7 pages, 2 figures

References in corpus (12)

• The New Heavy Mesons: A Status Report
• The Exotic XYZ Charmonium-like Mesons
• Search for new charmonium states in the processes e+ e- --> J/psi D(*) D(*) at sqrt{s} ~ 10.6 GeV
• Observation of the bottomonium ground state in the decay Upsilon(3S) -> gamma eta_b
• Decays of the X(3872) and ${\chi }_{c1}(2P)$ charmonium
• Hunting eta_b through radiative decay into J/psi
• Exclusive $et{a}_b$ decay to double $J/\psi$ at next-to-leading order in $alph{a}_s$
• Exclusive heavy quarkonium + gamma production from e+ e- annihilation into a virtual photon
• Which hadronic decay modes are good for ${\eta }_b$ searching: double $J/\psi$ or something else?
• Search for eta_b in two-photon collisions at LEP II with the DELPHI detector
• Spectroscopy of Mesons with Heavy Quarks
• Investigation of the bottomonium ground state η_b via its inclusive charm decays

Cited by in corpus (5)

• The hidden-charm pentaquark and tetraquark states
• Inclusive $h_c$ production at $B$ factories
• The Strong Decays of X(3940) and X(4160)
• The Production of $X(3940)$ and $X(4160)$ in $B_c$ decays
• Inclusive ${\chi }_{cJ}$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in NRQCD factorization