Two-loop $\cal O$ $(\alpha_{s}^2)$ MSSM corrections to the pole masses of heavy quarks

Bednyakov, A. V.; Onishchenko, A. I.; Velizhanin, V.N.; Veretin, O.L.

doi:10.1140/epjc/s2003-01178-4

Cited by 62 publications

(98 citation statements)

References 38 publications

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“…Afterwards, the additional non-SUSY thresholds stemming from massive bosons and the full one-loop SUSY thresholds are included. For m t also the known two-loop QCD corrections are added [80,81] (2)…”

Section: 3 Yukawa Couplingsmentioning

confidence: 99%

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Staub

Porod

2017

Eur. Phys. J. C

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For a long time, the minimal supersymmetric standard model (MSSM) with light masses for the supersymmetric states was considered as the most natural extension of the Standard Model of particle physics. Consequently, a valid approximation was to match the MSSM to the precision measurement directly at the electroweak scale. This approach was also utilized by all dedicated spectrum generators for the MSSM. However, the higher the supersymmetric (SUSY) scale is, the bigger the uncertainties which are introduced by this matching. We point out important consequences of a two-scale matching, where the running parameters within the SM are calculated at M Z and evaluated up to the SUSY scale, where they are matched to the full model. We show the impact on gauge coupling unification as well as the SUSY mass spectrum. Also the Higgs mass prediction for large supersymmetric masses has been improved by performing the calculation within an effective SM. The approach presented here is now also available in the spectrum generator SPheno. Moreover, also SARAH was extended accordingly and gives the possibility to study these effects now in many different supersymmetric models.

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Section: 3 Yukawa Couplingsmentioning

confidence: 99%

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Staub

Porod

2017

Eur. Phys. J. C

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“…In order to achieve that, we make use of the known two-loop SQCD contributions to the top and bottom Yukawa couplings of Refs. [51][52][53][54], as described in the following: We calculate the DR Yukawa couplings y t at the scale M Z from the DR top mass m t and the DR up-type VEV v u as…”

Section: Determination Of the Mssm Dr Parametersmentioning

confidence: 99%

Higgs mass prediction in the MSSM at three-loop level in a pure $$\overline{{\text {DR}}}$$ DR ¯ context

2017

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The impact of the three-loop effects of order α t α 2 s on the mass of the light CP-even Higgs boson in the MSSM is studied in a pure DR context. For this purpose, we implement the results of Kant et al. (JHEP 08:104, 2010) into the C++ module Himalaya and link it to FlexibleSUSY, a Mathematica and C++ package to create spectrum generators for BSM models. The three-loop result is compared to the fixed-order two-loop calculations of the original FlexibleSUSY and of FeynHiggs, as well as to the result based on an EFT approach. Aside from the expected reduction of the renormalization scale dependence with respect to the lower-order results, we find that the three-loop contributions significantly reduce the difference from the EFT prediction in the TeV-region of the SUSY scale M S . Himalaya can be linked also to other two-loop DR codes, thus allowing for the elevation of these codes to the three-loop level.

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“…(57)- (62) in ref. [29]. References [29][30][31] also include an extensive study of the impact of the two-loop top and bottom quark mass corrections in the MSSM.…”

Section: A Susyqcd Corrections To the Gluino Massmentioning

confidence: 99%

“…In recent years, many important higher-order calculations of self-energy functions and pole masses in the Standard Model have been performed, including two-loop [16]- [19] and three-loop [20]- [21] contributions for quarks, and two-loop results for electroweak vector bosons [22]- [28]. In addition, there are important two-loop results for top and bottom quarks [29][30][31] and the gluino [32] in low-energy supersymmetry. The general treatment of the present paper will confirm and extend the results of those papers.…”

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confidence: 99%

Fermion self-energies and pole masses at two-loop order in a general renormalizable theory with massless gauge bosons

Martin

2005

Phys. Rev. D

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I present the two-loop self-energy functions and pole masses for fermions in an arbitrary renormalizable field theory, in the approximation that vector bosons are treated as massless. The calculations are done simultaneously in the mass-independent MS, DR, and DR ′ renormalization schemes, with a general covariant gauge fixing, and treating Majorana and Dirac fermions in a unified way. As examples, I discuss the two-loop strong interaction corrections to the gluino, neutralino, chargino, and quark pole masses in minimal supersymmetry. All other two-loop contributions to the fermion pole masses in softly-broken supersymmetry can also be obtained as special cases of the results given here, neglecting only the electroweak symmetry breaking scale compared to larger mass scales in two-loop diagrams that involve W or Z bosons.

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Two-loop $\cal O$ $(\alpha_{s}^2)$ MSSM corrections to the pole masses of heavy quarks

Cited by 62 publications

References 38 publications

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Higgs mass prediction in the MSSM at three-loop level in a pure $$\overline{{\text {DR}}}$$ DR ¯ context

Fermion self-energies and pole masses at two-loop order in a general renormalizable theory with massless gauge bosons

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