Résumé
1. I update my previous comparison of the theoretical value of the muon anomaly $a_\mu\equiv \frac{1}{2}(g-2)_\mu$ with the new measurement and found $\Delta a_\mu\equiv a_\mu^{exp}-a_\mu^{th} = (143\pm 42_{th}\pm 22_{exp})\times 10^{-11}$ indicating about 3$\sigma$ discrepancy between the SM predictions and experiment. 2. I improve the estimate of QCD power corrections up to dimension D=12 and provide a new estimate of the ones up to D=20 within the Shifman-Vainshtein-Zahkarov (SVZ) expansion by combining the ratio of the SVZ Borel/Laplace sum rules (LSR) with the Braaten-Pich and the author (BNP) $\tau$-like decay moments for the I=1 vector current. The results summarized in Table 1 confirm a violation of the factorization of the four-quark condensates and the value of the gluon one $ <\alpha_s G^2>$ from some other sources. Up to D=20, I do not observe any factorial nor exponential growth of the size of these power corrections. 3. I use these new values of power corrections to extract $\alpha_s$ from the BNP lowest moment. To order $\alpha_s^4$, I find within the SVZ expansion: $\alpha_s(M_\tau)= 0.3081(50)_{fit}(71)_{\alpha_s^5}$ [resp. $0.3260 (47)_{fit}(62)_{\alpha_s^5}]$ implying $\alpha_s(M_Z)= 0.1170(6)(3)_{evol}$ [resp. $0.1192(6)(3)_{evol}$] for Fixed Order (FO) [resp. Contour Improved (CI)] PT series. They lead to the mean: $ \alpha_s(M_\tau)\vert_{SVZ}=0.3180(58)_{fit}(99)_{syst}$ and $ \alpha_s(M_Z)\vert_{SVZ}= 0.1182(14)(3)_{evol}$ where the systematic error(syst) takes into account the discrepancy between the FO and CI results. 4. Some (eventual) contributions beyond the SVZ expansion ($1/Q^2$, instantons and duality violation) are discussed in Sections 10 and 11.