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  • 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 (author)

One-loop matching conditions in neutrino effective theory

  • Article/chapterEnglish2022

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  • Elsevier BV,2022
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  • LIBRIS-ID:oai:DiVA.org:kth-314229
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-314229URI
  • https://doi.org/10.1016/j.nuclphysb.2022.115729DOI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

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  • 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.

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  • 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 (author)
  • KTHPartikel- och astropartikelfysik (creator_code:org_t)

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  • In:Nuclear Physics B: Elsevier BV9780550-32131873-1562

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