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Verlagsausgabe
DOI: 10.5445/IR/1000076841
Originalveröffentlichung
DOI: 10.1140/epjc/s10052-017-5303-x

Supersymmetric and non-supersymmetric models without catastrophic Goldstone bosons

Braathen, Johannes; Goodsell, Mark D.; Staub, Florian

Abstract:
The calculation of the Higgs mass in general renormalisable field theories has been plagued by the so-called “Goldstone Boson Catastrophe,” where light (would-be) Goldstone bosons give infra-red divergent loop integrals. In supersymmetric models, previous approaches included a workaround that ameliorated the problem for most, but not all, parameter space regions; while giving divergent results everywhere for non-supersymmetric models! We present an implementation of a general solution to the problem in the public code SARAH, along with new calculations of some necessary loop integrals and generic expressions. We discuss the validation of our code in the Standard Model, where we find remarkable agreement with the known results. We then show new applications in Split SUSY, the NMSSM, the Two-Higgs-Doublet Model, and the Georgi–Machacek model. In particular, we take some first steps to exploring where the habit of using tree-level mass relations in non-supersymmetric models breaks down, and show that the loop corrections usually become very large well before naive perturbativity bounds are reached.


Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1434-6044, 1434-6052
URN: urn:nbn:de:swb:90-768415
KITopen ID: 1000076841
Erschienen in The European physical journal / C
Band 77
Heft 11
Seiten 757
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
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