Investigation of the bottomonium ground state η_b via its inclusive charm decays

Abstract

Based on the non-relativistic QCD factorization formalism, we calculate the bottomonium ground state, ${\eta }_b$, inclusive charm decays at the leading order in the strong coupling constant ${\alpha }_s$ and quarkonium internal relative velocity $v$. The inclusive charm pair production in ${\eta }_b$ decay is mainly realized through ${\eta }_b\to c\bar{c}g$ process, where the charm and anti-charm quarks then dominantly hadronize into charmed hadrons. The momentum distributions of the final states are presented. In this work, we also calculate the $J/\psi$ inclusive production rate in the ${\eta }_b$ decays, where the color-octet contribution is found to be very important. We expect this study may shed some light on finding ${\eta }_b$ or knowing more about its nature.

Minor corrections and References added;to appear in PRD

References in corpus (4)

• Resummation of Large Endpoint Corrections to Color-Octet J/psi Photoproduction
• Inclusive Charm Production in chi_b Decays
• The color-singlet contribution to e^+ e^- ->J/psi + X at the endpoint
• Search for eta_b in two-photon collisions at LEP II with the DELPHI detector

Cited by in corpus (7)

• Re-Study on the wave functions of ${\rm Y}(nS)$ states in LFQM and the radiative decays of ${\rm Y}(nS)\to {\eta }_b+\gamma$
• Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales
• ${\rm Y}$ decay to two-charm quark jets as a Probe of the Color Octet Mechanism
• $B^{(\ast )}{\bar{B}}^{(\ast )}$ intermediate state contribution to ${\rm Y}(4S,5S)\to {\eta }_b+\gamma$ radiative decay
• Observation prospects of leptonic and Dalitz decays of pseudoscalar quarkonia
• Invariant-mass distribution of cc-bar in Upsilon(1S) -> cc-bar + X
• EtabFDC: an ${\eta }_b$ event generator in hadroproduction at LHC