Test of Physics beyond the Standard Model in Nuclei.
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| Title: | Test of Physics beyond the Standard Model in Nuclei. |
|---|---|
| Authors: | Faessler, A., Simkovic, F. |
| Source: | Physics of Atomic Nuclei. Jul2000, Vol. 63 Issue 7, p1165. 12p. |
| Subjects: | Standard model (Nuclear physics), Nuclear physics |
| Abstract: | The modern theories of Grand Unification (GUT) and SuperSymmetric (SUSY) extensions of Standard Model (SM) suppose that the conservation laws of the SM may be violated to some small degree. The nuclei are well-suited as a laboratory to test fundamental symmetries and fundamental interactions like lepton flavor (LF) and lepton number (LN) conservation. A prominent role between experiments looking for LF and total LN violation play not yet observed processes of neutrinoless double-beta decay (0vββ decay). The GUT and SUSY models offer a variety of mechanisms that allow 0vββ decay to occur. They are based on mixing of Majorana neutrinos and/or R-parity-violation hypothesis. Although the 0vββ-decay has not been seen, it is possible to extract from the lower limits of the lifetime upper limits for the effective electron Majorana neutrino mass, effective right-handed weak-interaction parameters, the effective Majoron coupling constant, R-parityviolating SUSY parameters, etc. A condition for obtaining reliable limits for these fundamental quantities is that the nuclear matrix elements governing this process can be calculated correctly. The nuclear structure wave functions can be tested by calculating the two-neutrino double-beta decay (2vββ decay) for which we have experimental data and not only lower limits as for the 0vββ decay. For open-shell nuclei, the method of choice has been the quasiparticle random-phase approximation (QRPA), which treats Fermion pairs as bosons. It has been found that, by extending the QRPA including fermion commutation relations, better agreement with 2vββdecay experiments is achieved. This increases also the reliability of conclusions from the upper limits on the 0vββ-decay transition probability. In this work, the limits on the LN-violating parameters extracted from current 0vββ-decay experiments are listed. Studies in respect to future 0vββ-decay... [ABSTRACT FROM AUTHOR] |
| Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 7317448 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Test of Physics beyond the Standard Model in Nuclei. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Faessler%2C+A%2E%22">Faessler, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Simkovic%2C+F%2E%22">Simkovic, F.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Physics+of+Atomic+Nuclei%22">Physics of Atomic Nuclei</searchLink>. Jul2000, Vol. 63 Issue 7, p1165. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Standard+model+%28Nuclear+physics%29%22">Standard model (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+physics%22">Nuclear physics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The modern theories of Grand Unification (GUT) and SuperSymmetric (SUSY) extensions of Standard Model (SM) suppose that the conservation laws of the SM may be violated to some small degree. The nuclei are well-suited as a laboratory to test fundamental symmetries and fundamental interactions like lepton flavor (LF) and lepton number (LN) conservation. A prominent role between experiments looking for LF and total LN violation play not yet observed processes of neutrinoless double-beta decay (0vββ decay). The GUT and SUSY models offer a variety of mechanisms that allow 0vββ decay to occur. They are based on mixing of Majorana neutrinos and/or R-parity-violation hypothesis. Although the 0vββ-decay has not been seen, it is possible to extract from the lower limits of the lifetime upper limits for the effective electron Majorana neutrino mass, effective right-handed weak-interaction parameters, the effective Majoron coupling constant, R-parityviolating SUSY parameters, etc. A condition for obtaining reliable limits for these fundamental quantities is that the nuclear matrix elements governing this process can be calculated correctly. The nuclear structure wave functions can be tested by calculating the two-neutrino double-beta decay (2vββ decay) for which we have experimental data and not only lower limits as for the 0vββ decay. For open-shell nuclei, the method of choice has been the quasiparticle random-phase approximation (QRPA), which treats Fermion pairs as bosons. It has been found that, by extending the QRPA including fermion commutation relations, better agreement with 2vββdecay experiments is achieved. This increases also the reliability of conclusions from the upper limits on the 0vββ-decay transition probability. In this work, the limits on the LN-violating parameters extracted from current 0vββ-decay experiments are listed. Studies in respect to future 0vββ-decay... [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/1.855762 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1165 Subjects: – SubjectFull: Standard model (Nuclear physics) Type: general – SubjectFull: Nuclear physics Type: general Titles: – TitleFull: Test of Physics beyond the Standard Model in Nuclei. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Faessler, A. – PersonEntity: Name: NameFull: Simkovic, F. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2000 Type: published Y: 2000 Identifiers: – Type: issn-print Value: 10637788 Numbering: – Type: volume Value: 63 – Type: issue Value: 7 Titles: – TitleFull: Physics of Atomic Nuclei Type: main |
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