Electromagnetic corrections to the hadronic vacuum polarization of the photon within QEDL and QEDM

Michele Della Morte, Andrea Bussone, Tadeusz Janowski

Publikation: Bidrag til tidsskriftKonferenceartikelForskningpeer review

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Resumé

We compute the leading QED corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments, al. We work in the electroquenched approximation and use dynamical QCD configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O(a)-improved Wilson fermions. We consider QEDL and QEDM to deal with the finite-volume zero modes. We compare results for the Wilson loops with exact analytical determinations. In addition we make sure that the volumes and photon masses used in QEDM are such that the correct dispersion relation is reproduced by the energy levels extracted from the charged pions two-point functions. Finally we compare results for pion masses and the HVP between QEDL and QEDM. For the vacuum polarization, corrections with respect to the pure QCD case, at fixed pion masses, turn out to be at the percent level.
OriginalsprogEngelsk
Artikelnummer06005
TidsskriftE P J Web of Conferences
Vol/bind175
Antal sider8
ISSN2100-014X
DOI
StatusUdgivet - 26. mar. 2018
Begivenhed35th International Symposium on Lattice Field Theory - Granada, Spanien
Varighed: 18. jun. 201724. jun. 2017
Konferencens nummer: 35

Konference

Konference35th International Symposium on Lattice Field Theory
Nummer35
LandSpanien
ByGranada
Periode18/06/201724/06/2017

Fingeraftryk

pions
electromagnetism
vacuum
photons
polarization
quantum chromodynamics
magnetic moments
fermions
energy levels
configurations
approximation

Citer dette

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abstract = "We compute the leading QED corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments, al. We work in the electroquenched approximation and use dynamical QCD configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O(a)-improved Wilson fermions. We consider QEDL and QEDM to deal with the finite-volume zero modes. We compare results for the Wilson loops with exact analytical determinations. In addition we make sure that the volumes and photon masses used in QEDM are such that the correct dispersion relation is reproduced by the energy levels extracted from the charged pions two-point functions. Finally we compare results for pion masses and the HVP between QEDL and QEDM. For the vacuum polarization, corrections with respect to the pure QCD case, at fixed pion masses, turn out to be at the percent level.",
author = "{Della Morte}, Michele and Andrea Bussone and Tadeusz Janowski",
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Electromagnetic corrections to the hadronic vacuum polarization of the photon within QEDL and QEDM. / Della Morte, Michele ; Bussone, Andrea; Janowski, Tadeusz.

I: E P J Web of Conferences, Bind 175, 06005, 26.03.2018.

Publikation: Bidrag til tidsskriftKonferenceartikelForskningpeer review

TY - GEN

T1 - Electromagnetic corrections to the hadronic vacuum polarization of the photon within QEDL and QEDM

AU - Della Morte, Michele

AU - Bussone, Andrea

AU - Janowski, Tadeusz

PY - 2018/3/26

Y1 - 2018/3/26

N2 - We compute the leading QED corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments, al. We work in the electroquenched approximation and use dynamical QCD configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O(a)-improved Wilson fermions. We consider QEDL and QEDM to deal with the finite-volume zero modes. We compare results for the Wilson loops with exact analytical determinations. In addition we make sure that the volumes and photon masses used in QEDM are such that the correct dispersion relation is reproduced by the energy levels extracted from the charged pions two-point functions. Finally we compare results for pion masses and the HVP between QEDL and QEDM. For the vacuum polarization, corrections with respect to the pure QCD case, at fixed pion masses, turn out to be at the percent level.

AB - We compute the leading QED corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments, al. We work in the electroquenched approximation and use dynamical QCD configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O(a)-improved Wilson fermions. We consider QEDL and QEDM to deal with the finite-volume zero modes. We compare results for the Wilson loops with exact analytical determinations. In addition we make sure that the volumes and photon masses used in QEDM are such that the correct dispersion relation is reproduced by the energy levels extracted from the charged pions two-point functions. Finally we compare results for pion masses and the HVP between QEDL and QEDM. For the vacuum polarization, corrections with respect to the pure QCD case, at fixed pion masses, turn out to be at the percent level.

U2 - 10.1051/epjconf/201817506005

DO - 10.1051/epjconf/201817506005

M3 - Conference article

VL - 175

JO - E P J Web of Conferences

JF - E P J Web of Conferences

SN - 2100-014X

M1 - 06005

ER -