What the study found
The study found that including quark scattering through strong interactions at leading-log order reduces the conductivity relevant to the electroweak sphaleron rate in the high-temperature Standard Model.
Why the authors say this matters
The authors note that the electroweak sphaleron rate is inversely proportional to the weak-isospin conductivity, so changes to conductivity affect the rate. They indicate that accounting for strong-interaction effects adds to earlier calculations that included only electroweak interactions.
What the researchers tested
The researchers examined the electroweak sphaleron rate in the high-temperature phase of the Standard Model and added quark scattering through strong interactions at leading-log order. They compared this contribution with calculations that had included only electroweak interactions.
What worked and what didn't
Including strong-interaction quark scattering reduced the quark contribution to the conductivity by up to 15%. The total conductivity was reduced by up to 6%.
What to keep in mind
The abstract does not describe other limitations, and the reported results are limited to leading-log order and the high-temperature phase of the Standard Model.
Key points
- The study adds strong-interaction quark scattering to earlier electroweak-only calculations.
- The electroweak sphaleron rate is described as inversely proportional to weak-isospin conductivity.
- Quark contribution to conductivity was reduced by up to 15%.
- Total conductivity was reduced by up to 6%.
- The results are reported for leading-log order in the high-temperature phase of the Standard Model.
Disclosure
- Research title:
- QCD corrections reduce conductivity in sphaleron-rate calculation
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