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Neutrinoless double beta decay in effective field theory

We discuss the contributions of lepton-number-violating sources to neutrinoless double beta decay ($0\nu\beta\beta$). Assuming that these sources arise at scales well above the electroweak scale, they can be described within an effective field theory. Here, we outline the steps required to express t...

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Autor principal: Dekens, W.
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:http://cds.cern.ch/record/2759001
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author Dekens, W.
author_facet Dekens, W.
author_sort Dekens, W.
collection CERN
description We discuss the contributions of lepton-number-violating sources to neutrinoless double beta decay ($0\nu\beta\beta$). Assuming that these sources arise at scales well above the electroweak scale, they can be described within an effective field theory. Here, we outline the steps required to express the $0\nu\beta\beta$ half-life in terms of the effective interactions, focusing on the dimension-five operator that induces a Majorana mass for the neutrinos. This process involves the evolution of the operators down to scales of a few GeV where they can be matched onto Chiral Perturbation Theory. The resulting Chiral Lagrangian can then used be to derive the lepton-number violating potential, which, in combination with many-body methods, gives the $0\nu\beta\beta$ half-life. We will show that consistent renormalization requires the inclusion of a new contact interaction at leading order in this potential. We also briefly comment on the constraints that can be set on the operators appearing beyond dimension five.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
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spelling cern-27590012023-02-16T08:51:05Zhttp://cds.cern.ch/record/2759001engDekens, W.Neutrinoless double beta decay in effective field theoryhep-phParticle Physics - PhenomenologyWe discuss the contributions of lepton-number-violating sources to neutrinoless double beta decay ($0\nu\beta\beta$). Assuming that these sources arise at scales well above the electroweak scale, they can be described within an effective field theory. Here, we outline the steps required to express the $0\nu\beta\beta$ half-life in terms of the effective interactions, focusing on the dimension-five operator that induces a Majorana mass for the neutrinos. This process involves the evolution of the operators down to scales of a few GeV where they can be matched onto Chiral Perturbation Theory. The resulting Chiral Lagrangian can then used be to derive the lepton-number violating potential, which, in combination with many-body methods, gives the $0\nu\beta\beta$ half-life. We will show that consistent renormalization requires the inclusion of a new contact interaction at leading order in this potential. We also briefly comment on the constraints that can be set on the operators appearing beyond dimension five.arXiv:1905.07516oai:cds.cern.ch:27590012019
spellingShingle hep-ph
Particle Physics - Phenomenology
Dekens, W.
Neutrinoless double beta decay in effective field theory
title Neutrinoless double beta decay in effective field theory
title_full Neutrinoless double beta decay in effective field theory
title_fullStr Neutrinoless double beta decay in effective field theory
title_full_unstemmed Neutrinoless double beta decay in effective field theory
title_short Neutrinoless double beta decay in effective field theory
title_sort neutrinoless double beta decay in effective field theory
topic hep-ph
Particle Physics - Phenomenology
url http://cds.cern.ch/record/2759001
work_keys_str_mv AT dekensw neutrinolessdoublebetadecayineffectivefieldtheory