Lepton-flavour violating decays in theories with dimension 6 operators
Despite a large experimental effort, so far no evidence for flavour-violating decays of charged leptons such as li → ljγ and li → ljlklk has been found. The absence of a signal puts very severe constraints on many extensions of the Standard Model. Here we apply a model independent approach by studyi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2016-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/201611801031 |
| _version_ | 1818658480816390144 |
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| author | Pruna Giovanni Marco Signer Adrian |
| author_facet | Pruna Giovanni Marco Signer Adrian |
| author_sort | Pruna Giovanni Marco |
| collection | DOAJ |
| description | Despite a large experimental effort, so far no evidence for flavour-violating decays of charged leptons
such as li → ljγ and li → ljlklk has been found. The absence of a signal puts very severe constraints on many extensions of the Standard Model. Here we apply a model independent approach by studying such decays in the Standard Model effective field theory. Going beyond leading order in the Standard Model couplings and considering all dimension 6 operators that might lead to lepton-flavour violation, we are able to extract limits on a large number ofWilson coefficients of such operators. We are also able to compare the impact of particular searches and find, for example, that flavour-violating decays of the Z-boson Z→ µe are much more constrained from low-energy experiments µ → eγ than from the limits of current and future direct searches at high energy. |
| first_indexed | 2024-12-17T03:58:03Z |
| format | Article |
| id | doaj.art-a2d1a98b596644558d99eaab31067cca |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T03:58:03Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-a2d1a98b596644558d99eaab31067cca2022-12-21T22:04:34ZengEDP SciencesEPJ Web of Conferences2100-014X2016-01-011180103110.1051/epjconf/201611801031epjconf_fccp2016_01031Lepton-flavour violating decays in theories with dimension 6 operatorsPruna Giovanni Marco0Signer AdrianPaul Scherrer InstitutDespite a large experimental effort, so far no evidence for flavour-violating decays of charged leptons such as li → ljγ and li → ljlklk has been found. The absence of a signal puts very severe constraints on many extensions of the Standard Model. Here we apply a model independent approach by studying such decays in the Standard Model effective field theory. Going beyond leading order in the Standard Model couplings and considering all dimension 6 operators that might lead to lepton-flavour violation, we are able to extract limits on a large number ofWilson coefficients of such operators. We are also able to compare the impact of particular searches and find, for example, that flavour-violating decays of the Z-boson Z→ µe are much more constrained from low-energy experiments µ → eγ than from the limits of current and future direct searches at high energy.http://dx.doi.org/10.1051/epjconf/201611801031 |
| spellingShingle | Pruna Giovanni Marco Signer Adrian Lepton-flavour violating decays in theories with dimension 6 operators EPJ Web of Conferences |
| title | Lepton-flavour violating decays in theories with dimension 6 operators |
| title_full | Lepton-flavour violating decays in theories with dimension 6 operators |
| title_fullStr | Lepton-flavour violating decays in theories with dimension 6 operators |
| title_full_unstemmed | Lepton-flavour violating decays in theories with dimension 6 operators |
| title_short | Lepton-flavour violating decays in theories with dimension 6 operators |
| title_sort | lepton flavour violating decays in theories with dimension 6 operators |
| url | http://dx.doi.org/10.1051/epjconf/201611801031 |
| work_keys_str_mv | AT prunagiovannimarco leptonflavourviolatingdecaysintheorieswithdimension6operators AT signeradrian leptonflavourviolatingdecaysintheorieswithdimension6operators |