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- W4319312880 abstract "We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment, $a_{mu}^{rm HVP}$, in the so-called short and intermediate time-distance windows, $a_{mu}^{rm SD}$ and $a_{mu}^{rm W}$. We employ gauge ensembles produced by the Extended Twisted Mass Collaboration (ETMC) with $N_f = 2 + 1 + 1$ flavours of Wilson-clover twisted-mass quarks with masses of all the dynamical quark flavours tuned close to their physical values. The simulations are carried out at three values of the lattice spacing equal to $simeq 0.057, 0.068$ and $0.080$ fm with spatial lattice sizes up to $L simeq 7.6$~fm. For the short distance window we obtain $a_mu^{rm SD} = 69.27,(34) cdot 10^{-10}$, in agreement with the dispersive determination based on experimental $e^+ e^-$ data. For the intermediate window we get instead $a_mu^{rm W} = 236.3,(1.3) cdot 10^{-10}$, which is consistent with recent determinations by other lattice collaborations, but disagrees with the dispersive determination at the level of $3.6,sigma$." @default.
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- W4319312880 date "2023-02-06" @default.
- W4319312880 modified "2023-10-18" @default.
- W4319312880 title "Time windows of the muon HVP from twisted-mass lattice QCD" @default.
- W4319312880 doi "https://doi.org/10.22323/1.430.0310" @default.
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