Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ
Abstract With the long-standing tension between experiment and Standard-Model (SM) prediction in the anomalous magnetic moment of the muon a μ recently reaffirmed by the Fermilab experiment, the crucial question becomes which other observables could be sensitive to the underlying physics beyond the...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-07-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP07(2021)135 |
| _version_ | 1819155596774998016 |
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| author | Andreas Crivellin Martin Hoferichter |
| author_facet | Andreas Crivellin Martin Hoferichter |
| author_sort | Andreas Crivellin |
| collection | DOAJ |
| description | Abstract With the long-standing tension between experiment and Standard-Model (SM) prediction in the anomalous magnetic moment of the muon a μ recently reaffirmed by the Fermilab experiment, the crucial question becomes which other observables could be sensitive to the underlying physics beyond the SM to which a μ may be pointing. While from the effective field theory (EFT) point of view no direct correlations exist, this changes in specific new physics models. In particular, in the case of explanations involving heavy new particles above the electroweak (EW) scale with chiral enhancement, which are preferred to evade exclusion limits from direct searches, correlations with other observables sensitive to EW symmetry breaking are expected. Such scenarios can be classified according to the SU(2) L representations and the hypercharges of the new particles. We match the resulting class of models with heavy new scalars and fermions onto SMEFT and study the resulting correlations with h → μμ and Z → μμ decays, where, via SU(2) L symmetry, the latter process is related to Z → νν and modified W-μ-ν couplings. |
| first_indexed | 2024-12-22T15:39:30Z |
| format | Article |
| id | doaj.art-c9c83f3239384bf2bd249124b4b3334f |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-22T15:39:30Z |
| publishDate | 2021-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-c9c83f3239384bf2bd249124b4b3334f2022-12-21T18:21:10ZengSpringerOpenJournal of High Energy Physics1029-84792021-07-012021712110.1007/JHEP07(2021)135Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμAndreas Crivellin0Martin Hoferichter1CERN Theory DivisionAlbert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of BernAbstract With the long-standing tension between experiment and Standard-Model (SM) prediction in the anomalous magnetic moment of the muon a μ recently reaffirmed by the Fermilab experiment, the crucial question becomes which other observables could be sensitive to the underlying physics beyond the SM to which a μ may be pointing. While from the effective field theory (EFT) point of view no direct correlations exist, this changes in specific new physics models. In particular, in the case of explanations involving heavy new particles above the electroweak (EW) scale with chiral enhancement, which are preferred to evade exclusion limits from direct searches, correlations with other observables sensitive to EW symmetry breaking are expected. Such scenarios can be classified according to the SU(2) L representations and the hypercharges of the new particles. We match the resulting class of models with heavy new scalars and fermions onto SMEFT and study the resulting correlations with h → μμ and Z → μμ decays, where, via SU(2) L symmetry, the latter process is related to Z → νν and modified W-μ-ν couplings.https://doi.org/10.1007/JHEP07(2021)135Beyond Standard ModelPrecision QED |
| spellingShingle | Andreas Crivellin Martin Hoferichter Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ Journal of High Energy Physics Beyond Standard Model Precision QED |
| title | Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ |
| title_full | Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ |
| title_fullStr | Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ |
| title_full_unstemmed | Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ |
| title_short | Consequences of chirally enhanced explanations of (g − 2) μ for h → μμ and Z → μμ |
| title_sort | consequences of chirally enhanced explanations of g 2 μ for h μμ and z μμ |
| topic | Beyond Standard Model Precision QED |
| url | https://doi.org/10.1007/JHEP07(2021)135 |
| work_keys_str_mv | AT andreascrivellin consequencesofchirallyenhancedexplanationsofg2mforhmmandzmm AT martinhoferichter consequencesofchirallyenhancedexplanationsofg2mforhmmandzmm |