Extraction of alpha_s from radiative Upsilon(1S) decays

Abstract

We improve on a recent determination of alpha_s from Gamma(Upsilon(1S)-->X gamma)/Gamma(Upsilon(1S)-->X) with CLEO data by taking into account color octet contributions and avoiding any model dependence in the extraction. We obtain alpha_s(M_Upsilon(1S))= 0.184+0.015-0.014, which corresponds to alpha_s(M_Z)=0.119+0.006-0.005.

11 pages. v2: One reference added. v3: Minor modification in an error estimate. Journal version

References in corpus (20)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• NLO Production and Decay of Quarkonium
• Order-v^4 Corrections to S-wave Quarkonium Decay
• The b quark low-scale running mass from Upsilon sum rules
• Bottom quark pole mass and $|V_{cb}|$ matrix element from $R(e^{+}{e}^{-}\to b\bar{b})$ and ${\Gamma }_{sl}(b\to cl{\nu }_l)$ in the next-to-next-to-leading order
• Heavy Quark Pair Production near Threshold with Potential Non-Relativistic QCD
• Annihilation of S-wave quarkonia and the measurement of alpha_s
• Inclusive Decays of Heavy Quarkonium to Light Particles
• Measurement of the Direct Photon Momentum Spectrum in Upsilon(1S), Upsilon(2S), and Upsilon(3S) Decays
• Measurement of the Direct Photon Spectrum in ${\rm Y}(1S)$ Decays
• The Octet Structure Function and Radiative Quarkonia Decay
• Spin correlations and velocity-scaling in color-octet NRQCD matrix elements
• Colour-Octet Effects in Radiative ${\rm Y}$ Decays
• Semi-inclusive radiative decays of Upsilon 1S
• Soft, collinear and non-relativistic modes in radiative decays of very heavy quarkonium
• QCD Corrections to Radiative Upsilon Decays
• The QCD Coupling Constant
• Kinematic Effects in Radiative Quarkonia Decays

Cited by in corpus (28)

• Heavy quarkonium: progress, puzzles, and opportunities
• The $XYZ$ states: experimental and theoretical status and perspectives
• QCD and strongly coupled gauge theories: challenges and perspectives
• The 2009 World Average of ${\alpha }_s$
• The QCD Running Coupling
• QCD corrections to J/psi and Upsilon production at hadron colliders
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• 50 Years of Quantum Chromodynamics
• First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in e^+e^- annihilations
• Review of Heavy Quarkonium at weak coupling
• World Summary of ${\alpha }_s$ (2012)
• Alpha_s(M_Z) from hadronic tau decays
• The Realistic Lattice Determination of alpha_s(M_Z) Revisited
• NLO QCD corrections to five-jet production at LEP and the extraction of alpha_s(M_Z)
• Determination of the QCD coupling from the static energy and the free energy
• A first estimate of triply heavy baryon masses from the pNRQCD perturbative static potential
• New bounds on lepton flavor violating decays of vector mesons and the Z0 boson
• Precision physics with inclusive QCD processes
• Inclusive Charm Production in Upsilon(nS) Decay
• A Mixed Tau-Electroproduction Sum Rule for V_us
• Strong coupling constant extraction from high-multiplicity Z+jets observables
• $\mathcal{O}({\alpha }_s{v}^2)$ corrections to hadronic decay of vector quarkonia
• FKS subtraction for quarkonium production at NLO
• $B_c$ meson exclusive decays to a $P$-wave charmonium and a pion at NLO accuracy
• Measurement of Upper Limits for Upsilon --> gamma + R Decays
• Systematic investigation of trace anomaly contribution in nucleon mass
• Low-energy constraints to ${\alpha }_s$
• Determining alpha_s from the hyperfine splitting mUpsilon(1S)-mEta(b)