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Pionic Contribution to Neutrinoless Double Beta Decay

It is well known that neutrinoless double decay is going to play a crucial role in settling the neutrino properties, which cannot be extracted from the neutrino oscillation data. It is, in particular, expected to settle the absolute scale of neutrino mass and determine whether the neutrinos are Majo...

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Detalles Bibliográficos
Autores principales: Vergados, J D, Faessler, Amand, Toki, H
Formato: info:eu-repo/semantics/article
Lenguaje:eng
Publicado: Phys. Rev. D 2009
Materias:
Acceso en línea:http://cds.cern.ch/record/1221713
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author Vergados, J D
Faessler, Amand
Toki, H
author_facet Vergados, J D
Faessler, Amand
Toki, H
author_sort Vergados, J D
collection CERN
description It is well known that neutrinoless double decay is going to play a crucial role in settling the neutrino properties, which cannot be extracted from the neutrino oscillation data. It is, in particular, expected to settle the absolute scale of neutrino mass and determine whether the neutrinos are Majorana particles, i.e. they coincide with their own antiparticles. In order to extract the average neutrino mass from the data one must be able to estimate the contribution all possible high mass intermediate particles. The latter, which occur in practically all extensions of the standard model, can, in principle, be differentiated from the usual mass term, if data from various targets are available. One, however, must first be able reliably calculate the corresponding nuclear matrix elements. Such calculations are extremely difficult since the effective transition operators are very short ranged. For such operators processes like pionic contributions, which are usually negligible, turn out to be dominant. We study such an effect in a non relativistic quark model for the pion and the nucleon.
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spelling cern-12217132019-09-30T06:29:59Z http://cds.cern.ch/record/1221713 eng Vergados, J D Faessler, Amand Toki, H Pionic Contribution to Neutrinoless Double Beta Decay Particle Physics - Phenomenology It is well known that neutrinoless double decay is going to play a crucial role in settling the neutrino properties, which cannot be extracted from the neutrino oscillation data. It is, in particular, expected to settle the absolute scale of neutrino mass and determine whether the neutrinos are Majorana particles, i.e. they coincide with their own antiparticles. In order to extract the average neutrino mass from the data one must be able to estimate the contribution all possible high mass intermediate particles. The latter, which occur in practically all extensions of the standard model, can, in principle, be differentiated from the usual mass term, if data from various targets are available. One, however, must first be able reliably calculate the corresponding nuclear matrix elements. Such calculations are extremely difficult since the effective transition operators are very short ranged. For such operators processes like pionic contributions, which are usually negligible, turn out to be dominant. We study such an effect in a non relativistic quark model for the pion and the nucleon. info:eu-repo/grantAgreement/EC/FP7/237920 info:eu-repo/semantics/openAccess Education Level info:eu-repo/semantics/article http://cds.cern.ch/record/1221713 Phys. Rev. D Phys. Rev. D, (2010) pp. 034018 2009-11-12
spellingShingle Particle Physics - Phenomenology
Vergados, J D
Faessler, Amand
Toki, H
Pionic Contribution to Neutrinoless Double Beta Decay
title Pionic Contribution to Neutrinoless Double Beta Decay
title_full Pionic Contribution to Neutrinoless Double Beta Decay
title_fullStr Pionic Contribution to Neutrinoless Double Beta Decay
title_full_unstemmed Pionic Contribution to Neutrinoless Double Beta Decay
title_short Pionic Contribution to Neutrinoless Double Beta Decay
title_sort pionic contribution to neutrinoless double beta decay
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/1221713
http://cds.cern.ch/record/1221713
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