A lattice calculation of the hadronic vacuum polarization contribution to (g - 2)μ
A lattice calculation of the hadronic vacuum polarization contribution to (g - 2)μ
We present results of calculations of the hadronic vacuum polarisation contribution to the muon anomalous magnetic moment. Specifically, we focus on controlling the infrared regime of the vacuum polarisation function. Our results are corrected for finite-size effects by combining the Gounaris-Sakurai parameterisation of the timelike pion form factor with the Lüscher formalism. The impact of quark-disconnected diagrams and the precision of the scale determination is discussed and included in our final result in two-flavour QCD, which carries an overall uncertainty of 6%. We present preliminary results computed on ensembles with Nf = 2 + 1 dynamical flavours and discuss how the long-distance contribution can be accurately constrained by a dedicated spectrum calculation in the iso-vector channel.
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DellaMorte, M.
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Francis, A.
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Gérardin, A.
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Gülpers, V.
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Herdoíza, G.
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Von Hippel, G.
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Horch, H.
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Jäger, B.
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Meyer, H.B.
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Nyffeler, A.
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Wittig, H.
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DellaMorte, M.
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Francis, A.
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Gérardin, A.
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Gülpers, V.
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Herdoíza, G.
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Von Hippel, G.
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Horch, H.
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Jäger, B.
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Meyer, H.B.
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Nyffeler, A.
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Wittig, H.
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DellaMorte, M., Francis, A., Gérardin, A., Gülpers, V., Herdoíza, G., Von Hippel, G., Horch, H., Jäger, B., Meyer, H.B., Nyffeler, A. and Wittig, H.
(2018)
A lattice calculation of the hadronic vacuum polarization contribution to (g - 2)μ.
EPJ Web of Conferences, 175, , [06031].
(doi:10.1051/epjconf/201817506031).
Abstract
We present results of calculations of the hadronic vacuum polarisation contribution to the muon anomalous magnetic moment. Specifically, we focus on controlling the infrared regime of the vacuum polarisation function. Our results are corrected for finite-size effects by combining the Gounaris-Sakurai parameterisation of the timelike pion form factor with the Lüscher formalism. The impact of quark-disconnected diagrams and the precision of the scale determination is discussed and included in our final result in two-flavour QCD, which carries an overall uncertainty of 6%. We present preliminary results computed on ensembles with Nf = 2 + 1 dynamical flavours and discuss how the long-distance contribution can be accurately constrained by a dedicated spectrum calculation in the iso-vector channel.
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epjconf_lattice2018_06031
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Accepted/In Press date: 1 April 2016
e-pub ahead of print date: 26 March 2018
Identifiers
Local EPrints ID: 419939
URI: http://eprints.soton.ac.uk/id/eprint/419939
ISSN: 2101-6275
PURE UUID: ab935ab6-3257-4e62-b63f-0dbe02c2dac6
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Date deposited: 24 Apr 2018 16:30
Last modified: 05 Jun 2024 18:17
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Contributors
Author:
M. DellaMorte
Author:
A. Francis
Author:
A. Gérardin
Author:
V. Gülpers
Author:
G. Herdoíza
Author:
G. Von Hippel
Author:
H. Horch
Author:
B. Jäger
Author:
H.B. Meyer
Author:
A. Nyffeler
Author:
H. Wittig
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