Gagliardi, G.; Alexandrou, C.; Bacchio, S.; Dimopoulos, P.; Finkenrath, J.; Frezzotti, R.; Garofalo, M.; Hadjiyiannakou, K.; Kostrzewa, B.; Jansen, K.; Lubicz, V.; Petschlies, M.; Sanfilippo, F.; Simula, S.; Urbach, C.; Wenger, U. (2022). Time windows of the muon HVP from twisted-mass lattice QCD. In: The 39th International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab 10.22323/1.430.0310
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We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment, aHVPμ , in the so-called short and intermediate time-distance windows, aSDμ and aWμ . We employ gauge ensembles produced by the Extended Twisted Mass Collaboration (ETMC) with Nf=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 ≃0.057,0.068 and 0.080 fm with spatial lattice sizes up to L≃7.6 ~fm. For the short distance window we obtain aSDμ=69.27(34)⋅10−10
, in agreement with the dispersive determination based on experimental e+e−
data. For the intermediate window we get instead aWμ=236.3(1.3)⋅10−10
, which is consistent with recent determinations by other lattice collaborations, but disagrees with the dispersive determination at the level of 3.6σ
.
Item Type: |
Conference or Workshop Item (Paper) |
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Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Wenger, Urs |
Subjects: |
500 Science > 530 Physics |
Publisher: |
Sissa Medialab |
Language: |
English |
Submitter: |
Binia Marti |
Date Deposited: |
21 Mar 2023 11:13 |
Last Modified: |
21 Mar 2023 23:27 |
Publisher DOI: |
10.22323/1.430.0310 |
BORIS DOI: |
10.48350/179883 |
URI: |
https://boris.unibe.ch/id/eprint/179883 |
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