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Connected, disconnected and strange quark contributions to HVP

Bijnens, Johan LU and Relefors, Johan LU (2016) In Journal of High Energy Physics 2016(11).
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.

Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chiral Lagrangians, Lattice QCD, Precision QED
in
Journal of High Energy Physics
volume
2016
issue
11
publisher
Springer
external identifiers
  • scopus:84995701440
  • wos:000387843300006
ISSN
1126-6708
DOI
10.1007/JHEP11(2016)086
language
English
LU publication?
yes
id
aed6bbe2-0123-4ba9-9f7f-50b19547d1a9
date added to LUP
2016-12-05 10:38:23
date last changed
2017-10-22 05:23:05
@article{aed6bbe2-0123-4ba9-9f7f-50b19547d1a9,
  abstract     = {<p>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.</p>},
  articleno    = {86},
  author       = {Bijnens, Johan and Relefors, Johan},
  issn         = {1126-6708},
  keyword      = {Chiral Lagrangians,Lattice QCD,Precision QED},
  language     = {eng},
  month        = {11},
  number       = {11},
  publisher    = {Springer},
  series       = {Journal of High Energy Physics},
  title        = {Connected, disconnected and strange quark contributions to HVP},
  url          = {http://dx.doi.org/10.1007/JHEP11(2016)086},
  volume       = {2016},
  year         = {2016},
}