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- W4387362952 abstract "Abstract We compute the electron g factor to the $mathcal {O}(alpha ^5)$ order on the lattice in quenched QED. We first study finite volume corrections in various IR regularization methods to discuss which regularization is optimal for our purpose. We find that in QEDL the finite volume correction to the effective mass can have different parametric dependences depending on the size of Euclidean time t and match the ‘naive on-shell result’ only at very large t region, t ≫ L. We adopt finite photon mass regularization to suppress finite volume effects exponentially and also discuss our strategy for selecting simulation parameters and the order of extrapolations to efficiently obtain the g factor. We perform lattice simulation using small lattices to test feasibility of our calculation strategy. This study can be regarded as an intermediate step toward giving the five-loop coefficient independently of the preceding studies." @default.
- W4387362952 created "2023-10-06" @default.
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- W4387362952 date "2023-10-05" @default.
- W4387362952 modified "2023-10-06" @default.
- W4387362952 title "QED on the lattice and numerical perturbative computation of <i>g</i> − 2" @default.
- W4387362952 doi "https://doi.org/10.1093/ptep/ptad125" @default.
- W4387362952 hasPublicationYear "2023" @default.
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