Study of the hadronic contributions to the running of the QED coupling and the weak mixing angle

Anthony Francis; Vera Gülpers; Gregorio Herdoíza; Hanno Horch; Benjamin Jäger; Harvey B. Meyer; Hartmut Wittig

doi:10.22323/1.251.0110

Study of the hadronic contributions to the running of the QED coupling and the weak mixing angle

Anthony Francis, Vera Gülpers, Gregorio Herdoíza, Hanno Horch, Benjamin Jäger, Harvey B. Meyer, Hartmut Wittig

Department of Mathematics and Computer Science

Research output: Contribution to journal › Conference article › Research › peer-review

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Abstract

The electromagnetic coupling receives significant contributions to its running from non-perturbative QCD effects. We present an update of a lattice QCD study of the Adler function and of its application to the determination of the running of the QED coupling. We perform a high-statistics computation with two flavours of O$(a)$ improved Wilson fermions in a large range of momentum transfer $Q^2$. The running of the electromagnetic coupling, including contributions from $u$, $d$, $s$ and $c$ valence quarks, is compared to phenomenological determinations at intermediate $Q^2$ values. An extension of this study to the determination of the hadronic contributions to the running of the weak mixing angle is also described.

Original language	English
Article number	110
Journal	P o S - Proceedings of Science
Volume	251
ISSN	1824-8039
DOIs	https://doi.org/10.22323/1.251.0110
Publication status	Published - 15. Nov 2015

Keywords

hep-lat

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10.22323/1.251.0110Licence: CC BY-NC-ND

1511.04751v1

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title = "Study of the hadronic contributions to the running of the QED coupling and the weak mixing angle",

abstract = " The electromagnetic coupling receives significant contributions to its running from non-perturbative QCD effects. We present an update of a lattice QCD study of the Adler function and of its application to the determination of the running of the QED coupling. We perform a high-statistics computation with two flavours of O$(a)$ improved Wilson fermions in a large range of momentum transfer $Q^2$. The running of the electromagnetic coupling, including contributions from $u$, $d$, $s$ and $c$ valence quarks, is compared to phenomenological determinations at intermediate $Q^2$ values. An extension of this study to the determination of the hadronic contributions to the running of the weak mixing angle is also described. ",

keywords = "hep-lat",

author = "Anthony Francis and Vera G{\"u}lpers and Gregorio Herdo{\'i}za and Hanno Horch and Benjamin J{\"a}ger and Meyer, {Harvey B.} and Hartmut Wittig",

year = "2015",

month = nov,

day = "15",

doi = "10.22323/1.251.0110",

language = "English",

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journal = "P o S - Proceedings of Science",

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T1 - Study of the hadronic contributions to the running of the QED coupling and the weak mixing angle

AU - Francis, Anthony

AU - Gülpers, Vera

AU - Herdoíza, Gregorio

AU - Horch, Hanno

AU - Jäger, Benjamin

AU - Meyer, Harvey B.

AU - Wittig, Hartmut

PY - 2015/11/15

Y1 - 2015/11/15

N2 - The electromagnetic coupling receives significant contributions to its running from non-perturbative QCD effects. We present an update of a lattice QCD study of the Adler function and of its application to the determination of the running of the QED coupling. We perform a high-statistics computation with two flavours of O$(a)$ improved Wilson fermions in a large range of momentum transfer $Q^2$. The running of the electromagnetic coupling, including contributions from $u$, $d$, $s$ and $c$ valence quarks, is compared to phenomenological determinations at intermediate $Q^2$ values. An extension of this study to the determination of the hadronic contributions to the running of the weak mixing angle is also described.

AB - The electromagnetic coupling receives significant contributions to its running from non-perturbative QCD effects. We present an update of a lattice QCD study of the Adler function and of its application to the determination of the running of the QED coupling. We perform a high-statistics computation with two flavours of O$(a)$ improved Wilson fermions in a large range of momentum transfer $Q^2$. The running of the electromagnetic coupling, including contributions from $u$, $d$, $s$ and $c$ valence quarks, is compared to phenomenological determinations at intermediate $Q^2$ values. An extension of this study to the determination of the hadronic contributions to the running of the weak mixing angle is also described.

KW - hep-lat

U2 - 10.22323/1.251.0110

DO - 10.22323/1.251.0110

M3 - Conference article

SN - 1824-8039

VL - 251

JO - P o S - Proceedings of Science

JF - P o S - Proceedings of Science

M1 - 110

ER -

Study of the hadronic contributions to the running of the QED coupling and the weak mixing angle

Abstract

Keywords

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