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- W2962865963 abstract "I present a more refined analysis of the mass-splittings between the different heavy quarkonia states, using {it new double ratios} of exponential moments of different two-point functions. Then, I test the validity of the $1/m$-expansion, extract $alpha_s(M_Z)=0.127pm 0.011$ from $M_{chi_c(P^1_1)} - M_{chi_c(P^3_1)}$, and provide a new estimate of the gluon condensate from $M_psi -M_{eta_c}$ and $M_{chi_b}-M_Upsilon$, which combined with the recent estimate from the $tau$-like decay sum rules in $e^+e^-rar I=1$ hadrons data, leads to the {it update average value} $laalpha_s G^2ra = (7.1pm 0.9)times 10^{-2}$ GeV$^4$ from the light and heavy quark systems. I also find $M_{Upsilon}-M_{eta_b}approx 63^{-29}_{+51}$ MeV implying the possible observation of the $eta_b$ in the $Upsilon$-radiative decay." @default.
- W2962865963 created "2019-07-30" @default.
- W2962865963 creator A5067614742 @default.
- W2962865963 date "1997-03-01" @default.
- W2962865963 modified "2023-09-28" @default.
- W2962865963 title "Heavy quarkonia mass-splittings in QCD: Test of the 1/m-expansion and estimates of 〈αsG2〉 and αs" @default.
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- W2962865963 doi "https://doi.org/10.1016/s0920-5632(97)00047-9" @default.
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