Connected, disconnected and strange quark contributions to HVP

Johan Bijnens; Johan Relefors

doi:10.1007/JHEP11(2016)086

Connected, disconnected and strange quark contributions to HVP

Johan Bijnens, Johan Relefors

Theoretical Particle Physics - Undergoing reorganization

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Abstract

We calculate all neutral vector two-point functions in Chiral Perturbation Theory (ChPT) to two-loop order and use these to estimate the ratio of disconnected to connected contributions as well as contributions involving the strange quark. We extend the ratio of −1/10 derived earlier in two flavour ChPT at one-loop order to a large part of the higher order contributions and discuss corrections to it. Our final estimate of the ratio disconnected to connected is negative and a few % in magnitude.

Original language	English
Article number	86
Journal	Journal of High Energy Physics
Volume	2016
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2016)086
Publication status	Published - 2016 Nov 1

Subject classification (UKÄ)

Subatomic Physics

Keywords

Chiral Lagrangians
Lattice QCD
Precision QED

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10.1007/JHEP11(2016)086

Cite this

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abstract = "We calculate all neutral vector two-point functions in Chiral Perturbation Theory (ChPT) to two-loop order and use these to estimate the ratio of disconnected to connected contributions as well as contributions involving the strange quark. We extend the ratio of −1/10 derived earlier in two flavour ChPT at one-loop order to a large part of the higher order contributions and discuss corrections to it. Our final estimate of the ratio disconnected to connected is negative and a few % in magnitude.",

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AB - We calculate all neutral vector two-point functions in Chiral Perturbation Theory (ChPT) to two-loop order and use these to estimate the ratio of disconnected to connected contributions as well as contributions involving the strange quark. We extend the ratio of −1/10 derived earlier in two flavour ChPT at one-loop order to a large part of the higher order contributions and discuss corrections to it. Our final estimate of the ratio disconnected to connected is negative and a few % in magnitude.

KW - Chiral Lagrangians

KW - Lattice QCD

KW - Precision QED

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DO - 10.1007/JHEP11(2016)086

M3 - Article

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JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

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ER -

Connected, disconnected and strange quark contributions to HVP

Abstract

Subject classification (UKÄ)

Keywords

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