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@ARTICLE{Borsanyi:891651,
author = {Borsanyi, Sz. and Fodor, Z. and Guenther, J. N. and
Hoelbling, C. and Katz, S. D. and Lellouch, L. and Lippert,
T. and Miura, K. and Parato, L. and Szabo, Kalman and
Stokes, F. and Toth, B. C. and Török, Csaba and Varnhorst,
L.},
title = {{L}eading hadronic contribution to the muon magnetic moment
from lattice {QCD}},
journal = {Nature},
volume = {593},
number = {7857},
issn = {1476-4687},
address = {London [u.a.]},
publisher = {Nature Publ. Group78092},
reportid = {FZJ-2021-01637},
pages = {51–55},
year = {2021},
abstract = {The standard model of particle physics describes the vast
majority of experiments and observations involving
elementary particles. Any deviation from its predictions
would be a sign of new, fundamental physics. One
long-standing discrepancy concerns the anomalous magnetic
moment of the muon, a measure of the magnetic field
surrounding that particle. Standard-model predictions (1)
exhibit disagreement with measurements (2) that is tightly
scattered around 3.7 standard deviations. Today, theoretical
and measurement errors are comparable; however, ongoing and
planned experiments aim to reduce the measurement error by a
factor of four. Theoretically, the dominant source of error
is the leading-order hadronic vacuum polarization (LO-HVP)
contribution. For the upcoming measurements, it is essential
to evaluate the prediction for this contribution with
independent methods and to reduce its uncertainties. The
most precise, model-independent determinations so far rely
on dispersive techniques, combined with measurements of the
cross-section of electron–positron annihilation into
hadrons (3,4,5,6). To eliminate our reliance on these
experiments, here we use ab initio quantum chromodynamics
(QCD) and quantum electrodynamics simulations to compute the
LO-HVP contribution. We reach sufficient precision to
discriminate between the measurement of the anomalous
magnetic moment of the muon and the predictions of
dispersive methods. Our result favours the experimentally
measured value over those obtained using the dispersion
relation. Moreover, the methods used and developed in this
work will enable further increased precision as more
powerful computers become available.},
cin = {JSC / NIC},
ddc = {500},
cid = {I:(DE-Juel1)JSC-20090406 / I:(DE-Juel1)NIC-20090406},
pnm = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
(SDLs) and Research Groups (POF4-511)},
pid = {G:(DE-HGF)POF4-5111},
typ = {PUB:(DE-HGF)16},
pubmed = {33828303},
UT = {WOS:000637674000001},
doi = {10.1038/s41586-021-03418-1},
url = {https://juser.fz-juelich.de/record/891651},
}