Exclusive $et{a}_b$ decay to double $J/\psi$ at next-to-leading order in $alph{a}_s$

Abstract

Within the nonrelativistic QCD (NRQCD) factorization framework, we calculate the exclusive decay process η_b \to J/ψJ/ψto next-to-leading order in the strong coupling constant, while at leading order in charm quark relative velocity. It is found that this new contribution to the amplitude is comparable in magnitude with the previously calculated relativistic correction piece, but differs by a phase about 90^\circ. Including this new contribution will increase the previous prediction to B(η_b \to J/ψJ/ψ) substantially, thus brightening the discovery potential of this clean hadronic decay channel of η_b in the forthcoming LHC experiment.

arXiv commentv2,16 pages, 3 figures; References added/updated, presentation refined, minor mistakes corrected. The absence of Coulomb divergences in Figure 1b) is stressed

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Cited by in corpus (23)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Next-to-Leading-Order QCD Corrections to e^ + e^- -> J/ψ+gg at the B Factories
• The evasion of helicity selection rule in ${\chi }_{c1}\to VV$ and ${\chi }_{c2}\to VP$ via intermediate charmed meson loops
• NRQCD matrix elements for S-wave bottomonia and Gamma[eta_b(nS) -> gamma gamma] with relativistic corrections
• Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales
• Bridging light-cone and NRQCD approaches: asymptotic behavior of $B_c$ electromagnetic form factor
• Double charmonium production in exclusive bottomonia decays
• Decay eta_b->J/ψJ/ψin light cone formalism
• Pseudoscalar Quarkonium Exclusive Decays to Vector Meson Pair
• $O({\alpha }_s)$ corrections to $J/\psi +{\chi }_{cJ}$ production at $B$ factories
• Relativistic Corrections to the Exclusive Decays of C-even Bottomonia into S-wave Charmonium Pairs
• Exclusive decay of P-wave Bottomonium into double J/ψ
• Exclusive decay of ${\rm Y}$ into $J/\psi +{\chi }_{c0,1,2}$
• The Exclusive Decay of Upsilon into $h_c$, the $X(3940)$ and $X(4160)$
• P-wave Quarkonium Decays to Meson Pairs
• Inclusive J/ψProduction In ΥDecay Via Color-singlet Mechanism
• Evidence of ${\rm Y}(1S)\to J/\psi +{\chi }_{c1}$ and search for double-charmonium production in ${\rm Y}(1S)$ and ${\rm Y}(2S)$ decays
• NLO corrections to ${\chi }_{bJ}$ to two-$J/\psi$ exclusive decay processes
• Inclusive decays of ${\eta }_b$ into $S$- and $P$-wave charmonium states
• Relativistic corrections to ${\rm Y}$ exclusive decay into double $S-$wave charmonia
• Observation prospects of leptonic and Dalitz decays of pseudoscalar quarkonia
• Improved measurements of branching fractions for ${\eta }_c\to \varphi \varphi$ and $\omega \varphi$
• $\mathcal{O}({\alpha }_s)$ corrections to $e^{+}{e}^{-}\to J/\psi +{\eta }_{c2}({\chi }_{c1}^{\prime })$ at $B$ factories