The impact of two-loop effects on the scenario of MSSM Higgs alignment without decoupling

Haber, Howard E.; Heinemeyer, Sven; Stefaniak, Tim

doi:10.1140/epjc/s10052-017-5243-5

Title: The impact of two-loop effects on the scenario of MSSM Higgs alignment without decoupling

Journal Article · Mon Nov 06 00:00:00 EST 2017 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-017-5243-5· OSTI ID:1407451

Haber, Howard E.; Heinemeyer, Sven;

In multi-Higgs models, the properties of one neutral scalar state approximate those of the Standard Model (SM) Higgs boson in a limit where the corresponding scalar field is roughly aligned in field space with the scalar doublet vacuum expectation value. In a scenario of alignment without decoupling, a SM-like Higgs boson can be accompanied by additional scalar states whose masses are of a similar order of magnitude. In the Minimal Supersymmetric Standard Model (MSSM), alignment without decoupling can be achieved due to an accidental cancellation of tree-level and radiative loop-level effects. In this paper we assess the impact of the leading two-loop $O (α_{s} h_{t}^{2})$ corrections on the Higgs alignment condition in the MSSM. These corrections are sizable and important in the relevant regions of parameter space and furthermore give rise to solutions of the alignment condition that are not present in the approximate one-loop description. We provide a comprehensive numerical comparison of the alignment condition obtained in the approximate one-loop and two-loop approximations, and discuss its implications for phenomenologically viable regions of the MSSM parameter space.

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Research Organization:: Univ. of California, Santa Cruz, CA (United States); Autonomous Univ. of Madrid (UAM) (Spain)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); Interministerial Commission of Science and Technology (CICYT) (Spain); State Research Agency (AEI) (Spain); Ministry of Science, Innovation and Universities (MICINN) (Spain); European Regional Development Fund (ERDF)

Grant/Contract Number:: SC0010107; FPA 2013-40715-P; FPA2016-78022-P; FPA2016-78645-P; SEV-2016-0597; CSD2009-00064

OSTI ID:: 1407451

Alternate ID(s):: OSTI ID: 1510214

Journal Information:: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Vol. 77 Journal Issue: 11; ISSN 1434-6044

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 17 works

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