Which hadronic decay modes are good for $η_b$ searching: double $J/ψ$ or something else?

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dc.creatorJia, Yu
dc.date2006-11-09
dc.date2008-07-21
dc.date.accessioned2026-07-07T11:58:54Z
dc.date.available2026-07-07T11:58:54Z
dc.descriptionIt has been controversial whether $η_b$ can be discovered in Tevatron Run 2 through the decay $η_b\to J/ψJ/ψ$ followed by $J/ψ\to μ^+μ^-$. We clear this controversy by an explicit calculation which predicts ${\rm Br}[η_b\to J/ψJ/ψ]$ to be of order $10^{-8}$. It is concluded that observing eta_b through this decay mode in Tevatron Run 2 is rather unrealistic. The eta_b may be observed in the forthcoming LHC experiments through the 4-lepton channel, if the background events can be significantly reduced by imposing some kinematical cuts. By some rough but plausible considerations, we find that the analogous decay processes eta_b to VV, D^*\bar{D}^* also have very suppressed branching ratios, nevertheless it may be worth looking for η_b at LHC and Super B factory through the decay modes η_b \to K_S K^{\pm}π^{\mp}, D^*\bar{D}.
dc.descriptionv2; 28 pages, 2 figures. References added, presentation improved. Discussion on possible nonperturbative mechanism for eta_b->VV added, analysis for eta_b->VP updated by incoprating the U-spin violation effect
dc.identifierhttps://arxiv.org/abs/hep-ph/0611130
dc.identifierhttp://arxiv.org/abs/hep-ph/0611130
dc.identifierPhys.Rev.D78:054003,2008
dc.identifierdoi:10.1103/PhysRevD.78.054003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206381
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleWhich hadronic decay modes are good for $η_b$ searching: double $J/ψ$ or something else?
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