Anomaly mediation from unbroken supergravity
When supergravity (SUGRA) is spontaneously broken, it is well known that anomaly mediation generates sparticle soft masses proportional to the gravitino mass. Recently, we showed that one-loop anomaly-mediated gaugino masses should be associated with unbroken supersymmetry (SUSY). This counterintuit...
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| Format: | Article |
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Springer Berlin Heidelberg
2018
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| Online Access: | http://hdl.handle.net/1721.1/116053 https://orcid.org/0000-0002-2406-8160 |
| _version_ | 1826188392258338816 |
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| author | D’Eramo, Francesco Thaler, Jesse Thomas, Zoe |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics D’Eramo, Francesco Thaler, Jesse Thomas, Zoe |
| author_sort | D’Eramo, Francesco |
| collection | MIT |
| description | When supergravity (SUGRA) is spontaneously broken, it is well known that anomaly mediation generates sparticle soft masses proportional to the gravitino mass. Recently, we showed that one-loop anomaly-mediated gaugino masses should be associated with unbroken supersymmetry (SUSY). This counterintuitive result arises because the underlying symmetry structure of (broken) SUGRA in flat space is in fact (unbroken) SUSY in anti-de Sitter (AdS) space. When quantum corrections are regulated in a way that preserves SUGRA, the underlying AdS curvature (proportional to the gravitino mass) necessarily appears in the regulated action, yielding soft masses without corresponding goldstino couplings. In this paper, we extend our analysis of anomaly mediation to sfermion soft masses. Already at tree-level we encounter a number of surprises, including the fact that zero soft masses correspond to broken (AdS) SUSY. At one-loop, we explain how anomaly mediation appears when regulating SUGRA in a way that preserves super-Weyl invariance. We find that recent claims in the literature about the non-existence of anomaly mediation were based on a Wilsonian effective action with residual gauge dependence, and the gaugeinvariant 1PI effective action contains the expected anomaly-mediated spectrum. Finally, we calculate the sfermion spectrum to all orders, and use supertrace relations to derive the familiar two-loop soft masses from minimal anomaly mediation, as well as unfamiliar tree-level and one-loop goldstino couplings consistent with renormalization group invariance. Keywords: Supersymmetry; Phenomenology |
| first_indexed | 2024-09-23T07:58:56Z |
| format | Article |
| id | mit-1721.1/116053 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T07:58:56Z |
| publishDate | 2018 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1160532023-07-03T06:23:11Z Anomaly mediation from unbroken supergravity D’Eramo, Francesco Thaler, Jesse Thomas, Zoe Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Thaler, Jesse Thomas, Zoe When supergravity (SUGRA) is spontaneously broken, it is well known that anomaly mediation generates sparticle soft masses proportional to the gravitino mass. Recently, we showed that one-loop anomaly-mediated gaugino masses should be associated with unbroken supersymmetry (SUSY). This counterintuitive result arises because the underlying symmetry structure of (broken) SUGRA in flat space is in fact (unbroken) SUSY in anti-de Sitter (AdS) space. When quantum corrections are regulated in a way that preserves SUGRA, the underlying AdS curvature (proportional to the gravitino mass) necessarily appears in the regulated action, yielding soft masses without corresponding goldstino couplings. In this paper, we extend our analysis of anomaly mediation to sfermion soft masses. Already at tree-level we encounter a number of surprises, including the fact that zero soft masses correspond to broken (AdS) SUSY. At one-loop, we explain how anomaly mediation appears when regulating SUGRA in a way that preserves super-Weyl invariance. We find that recent claims in the literature about the non-existence of anomaly mediation were based on a Wilsonian effective action with residual gauge dependence, and the gaugeinvariant 1PI effective action contains the expected anomaly-mediated spectrum. Finally, we calculate the sfermion spectrum to all orders, and use supertrace relations to derive the familiar two-loop soft masses from minimal anomaly mediation, as well as unfamiliar tree-level and one-loop goldstino couplings consistent with renormalization group invariance. Keywords: Supersymmetry; Phenomenology 2018-06-04T15:26:48Z 2018-06-04T15:26:48Z 2013-09 2013-07 2018-06-01T16:25:54Z Article http://purl.org/eprint/type/JournalArticle 1029-8479 http://hdl.handle.net/1721.1/116053 D’Eramo, Francesco, Jesse Thaler, and Zoe Thomas. “Anomaly Mediation from Unbroken Supergravity.” Journal of High Energy Physics 2013, 9 (September 2013): 125 © 2013 SISSA https://orcid.org/0000-0002-2406-8160 http://dx.doi.org/10.1007/JHEP09(2013)125 Journal of High Energy Physics Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Berlin Heidelberg arXiv |
| spellingShingle | D’Eramo, Francesco Thaler, Jesse Thomas, Zoe Anomaly mediation from unbroken supergravity |
| title | Anomaly mediation from unbroken supergravity |
| title_full | Anomaly mediation from unbroken supergravity |
| title_fullStr | Anomaly mediation from unbroken supergravity |
| title_full_unstemmed | Anomaly mediation from unbroken supergravity |
| title_short | Anomaly mediation from unbroken supergravity |
| title_sort | anomaly mediation from unbroken supergravity |
| url | http://hdl.handle.net/1721.1/116053 https://orcid.org/0000-0002-2406-8160 |
| work_keys_str_mv | AT deramofrancesco anomalymediationfromunbrokensupergravity AT thalerjesse anomalymediationfromunbrokensupergravity AT thomaszoe anomalymediationfromunbrokensupergravity |