Heavy scalar tau decays in the complex MSSM: a full one-loop analysis

Heinemeyer, S.; Schappacher, C.

doi:10.1140/epjc/s10052-012-2136-5

Cited by 12 publications

(1 citation statement)

References 107 publications

(136 reference statements)

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“…[54][55][56] an on-shell scheme for the renormalisation of the chargino and neutralino sector in the complex MSSM has also been employed. The differences in the approach of treating the CP-violating phases as compared to the present paper have been discussed in ref.…”

Section: Jhep05(2013)053mentioning

confidence: 99%

Consistent on shell renormalisation of electroweakinos in the complex MSSM: LHC and LC predictions

Bharucha

Fowler

Moortgat‐Pick

et al. 2013

J. High Energ. Phys.

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Abstract:We extend the formalism developed in ref. [53] for the renormalisation of the chargino-neutralino sector to the most general case of the MSSM with complex parameters. We show that products of imaginary parts arising from MSSM parameters and from absorptive parts of loop integrals can already contribute to predictions for physical observables at the one-loop level, and demonstrate that the consistent treatment of such contributions gives rise to non-trivial structure, either in the field renormalisation constants or the corrections associated with the external legs of the considered diagrams. We furthermore point out that the phases of the parameters in the chargino-neutralino sector do not need to be renormalised at the one-loop level, and demonstrate that the appropriate choice for the mass parameters used as input for the on-shell conditions depends both on the process and the region of MSSM parameter space under consideration. As an application, we compute the complete one-loop results in the MSSM with complex parameters for the process h a →χ + iχ − j (Higgs-propagator corrections have been incorporated up to the two-loop level), which may be of interest for SUSY Higgs searches at the LHC, and for chargino pair-production at an e + e − Linear Collider, e + e − →χ + iχ − j . We investigate the dependence of the theoretical predictions on the phases of the MSSM parameters, analysing in particular the numerical relevance of the absorptive parts of loop integrals.

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Section: Jhep05(2013)053mentioning

confidence: 99%

Consistent on shell renormalisation of electroweakinos in the complex MSSM: LHC and LC predictions

Bharucha

Fowler

Moortgat‐Pick

et al. 2013

J. High Energ. Phys.

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The implementation of the renormalized complex MSSM in FeynArts and FormCalc

Fritzsche¹,

Hahn²,

Heinemeyer

et al. 2014

Computer Physics Communications

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We describe the implementation of the renormalized complex MSSM (cMSSM) in the diagram generator FeynArts and the calculational tool FormCalc. This extension allows to perform UV-finite one-loop calculations of cMSSM processes almost fully automatically. The Feynman rules for the cMSSM with counterterms are available as a new model file for FeynArts. Also included are default definitions of the renormalization constants; this fixes the renormalization scheme. Beyond that all model parameters are generic, e.g. we do not impose any relations to restrict the number of input parameters.The model file has been tested extensively for several non-trivial decays and scattering reactions. Our renormalization scheme has been shown to give stable results over large parts of the cMSSM parameter space.

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