The two faces of anomaly mediation
Anomaly mediation is a ubiquitous source of supersymmetry (SUSY) breaking which appears in almost every theory of supergravity. In this paper, we show that anomaly mediation really consists of two physically distinct phenomena, which we dub “gravitino mediation” and “Kähler mediation”. Gravitino med...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2013
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| Online Access: | http://hdl.handle.net/1721.1/76621 https://orcid.org/0000-0002-2406-8160 |
| _version_ | 1826199176043560960 |
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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 | Anomaly mediation is a ubiquitous source of supersymmetry (SUSY) breaking which appears in almost every theory of supergravity. In this paper, we show that anomaly mediation really consists of two physically distinct phenomena, which we dub “gravitino mediation” and “Kähler mediation”. Gravitino mediation arises from minimally uplifting SUSY anti-de Sitter (AdS) space to Minkowski space, generating soft masses proportional to the gravitino mass. Kähler mediation arises when visible sector fields have linear couplings to SUSY breaking in the Kähler potential, generating soft masses proportional to beta function coefficients. In the literature, these two phenomena are lumped together under the name “anomaly mediation”, but here we demonstrate that they can be physically disentangled by measuring associated couplings to the goldstino. In particular, we use the example of gaugino soft masses to show that gravitino mediation generates soft masses without corresponding goldstino couplings. This result naively violates the goldstino equivalence theorem but is in fact necessary for supercurrent conservation in AdS space. Since gravitino mediation persists even when the visible sector is sequestered from SUSY breaking, we can use the absence of goldstino couplings as an unambiguous definition of sequestering. |
| first_indexed | 2024-09-23T11:15:55Z |
| format | Article |
| id | mit-1721.1/76621 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:15:55Z |
| publishDate | 2013 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/766212023-06-03T05:20:57Z The two faces of anomaly mediation D'Eramo, Francesco Thaler, Jesse Thomas, Zoe Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Thaler, Jesse Thomas, Zachary Talbott D'Eramo, Francesco Anomaly mediation is a ubiquitous source of supersymmetry (SUSY) breaking which appears in almost every theory of supergravity. In this paper, we show that anomaly mediation really consists of two physically distinct phenomena, which we dub “gravitino mediation” and “Kähler mediation”. Gravitino mediation arises from minimally uplifting SUSY anti-de Sitter (AdS) space to Minkowski space, generating soft masses proportional to the gravitino mass. Kähler mediation arises when visible sector fields have linear couplings to SUSY breaking in the Kähler potential, generating soft masses proportional to beta function coefficients. In the literature, these two phenomena are lumped together under the name “anomaly mediation”, but here we demonstrate that they can be physically disentangled by measuring associated couplings to the goldstino. In particular, we use the example of gaugino soft masses to show that gravitino mediation generates soft masses without corresponding goldstino couplings. This result naively violates the goldstino equivalence theorem but is in fact necessary for supercurrent conservation in AdS space. Since gravitino mediation persists even when the visible sector is sequestered from SUSY breaking, we can use the absence of goldstino couplings as an unambiguous definition of sequestering. United States. Dept. of Energy (Cooperative Research Agreement DE-FG02-05ER-41360) United States. Dept. of Energy (Early Career Research Program DE-FG02-11ER-41741) 2013-01-29T18:42:46Z 2013-01-29T18:42:46Z 2012-06 Article http://purl.org/eprint/type/JournalArticle 1126-6708 1029-8479 http://hdl.handle.net/1721.1/76621 D’Eramo, Francesco, Jesse Thaler, and Zoe Thomas. “The Two Faces of Anomaly Mediation.” Journal of High Energy Physics 2012.6 (2012). https://orcid.org/0000-0002-2406-8160 en_US http://dx.doi.org/10.1007/jhep06(2012)151 Journal of High Energy Physics Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Springer-Verlag arXiv |
| spellingShingle | D'Eramo, Francesco Thaler, Jesse Thomas, Zoe The two faces of anomaly mediation |
| title | The two faces of anomaly mediation |
| title_full | The two faces of anomaly mediation |
| title_fullStr | The two faces of anomaly mediation |
| title_full_unstemmed | The two faces of anomaly mediation |
| title_short | The two faces of anomaly mediation |
| title_sort | two faces of anomaly mediation |
| url | http://hdl.handle.net/1721.1/76621 https://orcid.org/0000-0002-2406-8160 |
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