Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich.
mehr Informationen...
One-loop matching in the SMEFT extended with a sterile neutrino
Ist Teil von
The journal of high energy physics, 2020-05, Vol.2020 (5), p.1-31, Article 139
Ort / Verlag
Berlin/Heidelberg: Springer Berlin Heidelberg
Erscheinungsjahr
2020
Link zum Volltext
Quelle
EZB Free E-Journals
Beschreibungen/Notizen
A
bstract
We study the phenomenology of the simplest renormalisable model that, at low energy, leads to the effective field theory of the Standard Model extended with right-handed neutrinos (
ν
SMEFT). Our aim is twofold. First, to contextualise new collider signatures in models with sterile neutrinos so far studied only using the bottom-up approach. And second and more important, to provide a thorough example of one-loop matching in the diagrammatic approach, of which other matching techniques and automatic tools can benefit for cross-checks. As byproducts of this work, we provide for the first time:
(i)
a complete off-shell basis for the
ν
SMEFT and explicit relations between operators linked by equations of motion;
(ii)
a complete basis for the low-energy effective field theory (
ν
LEFT) and the tree-level matching onto the
ν
SMEFT;
(iii)
partial one-loop anomalous dimensions in the
ν
LEFT. This way, our work comprises a new step forward towards the systematisation of one-loop computations in effective field theories, especially if the SM neutrinos are Dirac.