Anomaly mediation from unbroken supergravity
Name
1307.3251.pdf
Size
938.37 KB
Format
Adobe PDF
Checksum (MD5)
1a833abe0122d9cf95147d6c761ac1c2
Author(s)
D’Eramo, Francesco
Thaler, Jesse
Thomas, Zoe
Date Issued
September 2013
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
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
Version
Final published version
Abstract
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
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Attribution 4.0 International (CC BY 4.0)
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP09(2013)125
