One-loop matching conditions in neutrino effective theory

Ohlsson, Tommy,Professor,1973-KTH,Partikel- och astropartikelfysik,The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Center, Roslagstullsbacken 21, Stockholm, SE-106 91, Sweden (författare)

QC 20220617
We investigate matching conditions and threshold corrections between full and effective theories based on the type I seesaw mechanism. In general, using an intuitive Feynman diagrammatical approach, we compute the amplitudes before and after integrating out heavy right-handed neutrinos at the matching scale. In particular, we derive the one-loop matching conditions between the full and the effective theories. The matching conditions of the parameters are influenced by one-loop corrections to the corresponding vertices as well as wave function corrections for the Higgs and the lepton fields. Our results are comparable to earlier results based on a functional approach.

Pernow, MarcusKTH,Partikel- och astropartikelfysik,The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Center, Roslagstullsbacken 21, Stockholm, SE-106 91, Sweden(Swepub:kth)u1w5thnk (författare)
KTHPartikel- och astropartikelfysik (creator_code:org_t)

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.