Four-flavour leading-order hadronic contribution to the muon anomalous magnetic moment

Burger, Florian; Feng, Xu; Hotzel, Grit; Jansen, Karl; Petschlies, Marcus; Renner, Dru B.

doi:10.1007/JHEP02(2014)099

Title: Four-flavour leading-order hadronic contribution to the muon anomalous magnetic moment

Journal Article · Mon Feb 24 00:00:00 EST 2014 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP02(2014)099· OSTI ID:1121883

Burger, Florian ^[1]; Feng, Xu ^[2]; Hotzel, Grit ^[1]; Jansen, Karl ^[3]; Petschlies, Marcus ^[4]; Renner, Dru B. ^[5]

Humboldt Univ. zu Berlin, Berlin (Germany)
High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. of Cyprus, Nicosia (Cyprus)
The Cyprus Institute, Nicosia (Cyprus)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

We present a four-flavour lattice calculation of the leading-order hadronic vacuum polarisation contribution to the anomalous magnetic moment of the muon, aμ^hvp, arising from quark-connected Feynman graphs. It is based on ensembles featuring N_f=2+1+1 dynamical twisted mass fermions generated by the European Twisted Mass Collaboration (ETMC). Several light quark masses are used in order to yield a controlled extrapolation to the physical pion mass. We employ three lattice spacings to examine lattice artefacts and several different volumes to check for finite-size effects. Including the complete first two generations of quarks allows for a direct comparison with phenomenological determinations of a μ^hvp. The final result involving an estimate of the systematic uncertainty a_μ^hvp=6.74 (21)(18) 10^-8 shows a good overall agreement with these computations.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: The ETM collaboration

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1121883

Report Number(s):: JLAB-THY-13-1771; DOE/OR/23177-2695; arXiv:1308.4327; TRN: US1500450

Journal Information:: Journal of High Energy Physics (Online), Vol. 2014, Issue 2; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 60 works

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