2019/11/12 by Antoine Gérardin, Marco Cè, Gérardin, Antoine +15
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Computational Physics and Python Applications
paper · pdf · doi:10.48550/arxiv.1911.04733
We present a lattice calculation of the leading hadronic contribution to the\nanomalous magnetic moment of the muon. This work is based on a subset of the\nCLS ensembles with Nf = 2+1 dynamical quarks and a quenched charm quark.\nNoise reduction techniques are used to improve significantly the statistical\nprecision of the dominant light quark contribution. The main source of\nsystematic error comes from finite size effects which are estimated using the\nformalism described in Ref. [7] and based on our knowledge of the timelike pion\nform factor. The strange and charm quark contributions are under control and an\nestimate of the quark-disconnected contribution is included. Isospin breaking\neffects will be studied in a future publication but are included in the\nsystematic error using an estimate based on published lattice results. Our\nfinal result, a_\μ rm hvp = (720.0\± 12.4 \± 6.8)\× 10-10, has a\nprecision of about 2%.\n