Two-photon width of eta_b, eta'_b and eta''_b from Heavy-Quark Spin Symmetry

Abstract

We predict the two-photon width of the pseudoscalar bottomonia, Gamma(eta_b -> gamma gamma), Gamma(eta'_b -> gamma gamma) and Gamma(eta''_b -> gamma gamma) within a Heavy-Quark Spin-Symmetry setting following the same line as our recent work for the corresponding decays for charmonia. Binding-energy effects are included for excited states and are shown to shift up the eta'_b and eta''_b widths by 10 %. We point out that the essentially model independent ratio Gamma(eta_b -> gamma gamma)/Gamma(Upsilon -> ll) and the branching ratio BR(eta_b -> gamma gamma) obtained could be used to extract the coupling constant alpha_s.

arXiv comment3 pages, Revtex4; v2: 2 references added

References in corpus (20)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Heavy Quark Symmetry
• Phenomenology of Heavy Meson Chiral Lagrangians
• Effective field theories for heavy quarkonium
• The New Heavy Mesons: A Status Report
• Radiative Transitions in Charmonium from Lattice QCD
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Two-Photon Decays of Mesons in a Relativistic Quark Model
• Dynamic Properties of Charmonium
• Observation of eta_c^{prime} Production in gamma gamma Fusion at CLEO
• Meson--photon transition form factors and resonance cross-sections in e^+ e^- collisions
• Two-photon decay rates of heavy quarkonia in the relativistic quark model
• Spin Dependence of Heavy Quarkonium Production and Annihilation Rates: Complete Next-to-Next-to-Leading Logarithmic result
• Observation potential for eta_b at the Tevatron
• Annihilation Rate of Heavy $0^{-+}$ Quarkonium in Relativistic Salpeter Method
• Search for gammagamma -> eta_b in e+e- collisions at LEP2
• Two-photon width of eta_c and eta'_c from Heavy-Quark Spin Symmetry
• The Decay ${\eta }_c\to \gamma \gamma$ : A Test for Potential Models
• etab Decay into Two Photons

Cited by in corpus (18)

• Observation of the bottomonium ground state in the decay Upsilon(3S) -> gamma eta_b
• Decay constants and radiative decays of heavy mesons in light-front quark model
• Evidence for the eta_b(1S) Meson in Radiative Upsilon(2S) Decay
• Properties of $Q\bar{Q}$ $(Q\epsilon b,c)$ mesons in Coulomb plus Power potential
• Measurement of the eta_b(1S) mass and the branching fraction for Upsilon(3S) --> gamma eta_b(1S)
• Variational Analysis of Mass Spectra and Decay Constants for Ground State Pseudoscalar and Vector Mesons in Light-Front Quark Model
• NRQCD matrix elements for S-wave bottomonia and Gamma[eta_b(nS) -> gamma gamma] with relativistic corrections
• Scalar Quarkonia at Finite Temperature
• $O({\alpha }_s{v}^2)$ Corrections to Hadronic and Electromagnetic Decays of ${}^1{S}_0$ Heavy Quarkonium
• Mass spectra and decay properties of $D_s$ Meson in a relativistic Dirac formalism
• Effective Lagrangian for Two-photon and Two-gluon Decays of $P$-wave Heavy Quarkonium ${\chi }_{c0,2}$ and ${\chi }_{b0,2}$ states
• Mass spectra and decay properties of $D$ Meson in a relativistic Dirac formalism
• Two-Photon, Two-gluon and Radiative Decays of Heavy Flavoured Mesons
• Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales
• η_b and η_c radiative decays in the Salpeter model with the AdS/QCD inspired potential
• Radiative and leptonic decays of the pseudoscalar charmonium state ${\eta }_c$
• Two-photon decay of pseudoscalar quarkonia
• Study of meson properties in quark models (Ph.D. Thesis, University of Pittsburgh, October 2006)