The MSSM without gluinos; an effective field theory for the stop sector

Aebischer, Jason; Crivellin, Andreas; Greub, Christoph; Yamada, Youichi

doi:10.1140/epjc/s10052-017-5318-3

“…In the calculation of these corrections the relations g µν g µν = d = 4 − and (C.12) were used repeatedly. The one-loop corrections δm 2 q and δm 2 ũ to the third generation squark mass parameters have already been calculated in [42] and our results agree with the expressions found there.…”

Section: 113)supporting

confidence: 90%

“…which must be eliminated by inserting the background field from (4.97). As noted above the threshold corrections for the two stop masses agree with the results derived in [42] when the effect of the sbottom quarks is neglected.…”

Section: 113)supporting

confidence: 85%

Completing the scalar and fermionic universal one-loop effective action

Krämer

¹

,

Summ

²

,

Voigt

³

2020

J. High Energ. Phys.

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We extend the known Universal One-Loop Effective Action (UOLEA) by all operators which involve scalars and fermions, not including contributions arising from open covariant derivatives. Our generic analytic expressions for the one-loop Wilson coefficients of effective operators up to dimension six allow for an application of the UOLEA to a broader class of UV-complete models. We apply our generic results to various effective theories of supersymmetric models, where different supersymmetric particles are integrated out at a high mass scale.

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“…Whereas the EFT calculation, implemented in FeynHiggs, resums large logarithms associated with the gluino for M 3 < M SUSY (SM plus gluino as EFT, see [30,45] for more details), the corresponding logarithms are not resummed for M 3 > M SUSY (and there are also nonlogarithmic terms giving rise to the approximately quadratic dependence on M 3 ). The suitable EFT -MSSM without gluino -has not been worked out yet for the calculation of the SM-like Higgs-boson mass but it has been employed for the calculation of other observables [72][73][74], in which similar non-decoupling effects arise.…”

Section: Numerical Resultsmentioning

confidence: 99%

Theoretical uncertainties in the MSSM Higgs boson mass calculation

Bahl

¹

,

Heinemeyer

²

,

Hollik

³

et al. 2020

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The remaining theoretical uncertainties from unknown higher-order corrections in the prediction for the light Higgs-boson mass of the MSSM are estimated. The uncertainties associated with three different approaches that are implemented in the publicly available code FeynHiggs are compared: the fixed-order diagrammatic approach, suitable for low SUSY scales, the effective field theory (EFT) approach, suitable for high SUSY scales, and the hybrid approach which combines the fixed-order and the EFT approaches. It is demonstrated for a simple single-scale scenario that the result based on the hybrid approach yields a precise prediction for low, intermediate and high SUSY scales with a theoretical uncertainty of up to ∼ 1.5 GeV for large stop mixing and ∼ 0.5 GeV for small stop mixing. The uncertainty estimate of the hybrid calculation approaches the uncertainty estimate of the fixed-order result for low SUSY scales and the uncertainty estimate of the EFT approach for high SUSY scales, while for intermediate scales it is reduced compared to both of the individual results. The estimate of the theoretical uncertainty is also investigated in scenarios with more than one mass scale. A significantly enhanced uncertainty is found in scenarios where the gluino is substantially heavier than the scalar top quarks. The uncertainty estimate presented in this paper will be part of the public code FeynHiggs.

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“…Whereas the EFT calculation, implemented in FeynHiggs, resums large logarithms associated with the gluino for M 3 < M SUSY (SM plus gluino as EFT, see [28,44] for more details), the corresponding logarithms are not resummed for M 3 > M SUSY (and there are also non-logarithmic terms giving rise to the linear dependence on M 3 ). The suitable EFT -MSSM without gluino -has not been worked out yet for the calculation of the SM-like Higgs-boson mass but it has been employed for the calculation of other observables [67][68][69], in which similar non-decoupling effects arise.…”

Section: Numerical Resultsmentioning

confidence: 99%

Theoretical uncertainties in the MSSM Higgs boson mass calculation

Bahl,

Heinemeyer,

Hollik

et al. 2019

Preprint

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The remaining theoretical uncertainties from unknown higher-order corrections in the prediction for the light Higgs-boson mass of the MSSM are estimated. The uncertainties associated with three different approaches that are implemented in the publicly available code FeynHiggs are compared: the fixed-order diagrammatic approach, suitable for low SUSY scales, the effective field theory (EFT) approach, suitable for high SUSY scales, and the hybrid approach which combines the fixed-order and the EFT approaches. It is demonstrated for a simple single-scale scenario that the result based on the hybrid approach yields a precise prediction for low, intermediate and high SUSY scales with a theoretical uncertainty of up to ∼ 1.5 GeV for large stop mixing and ∼ 0.5 GeV for small stop mixing. The uncertainty estimate of the hybrid calculation approaches the uncertainty estimate of the fixed-order result for low SUSY scales and the uncertainty estimate of the EFT approach for high SUSY scales, while for intermediate scales it is reduced compared to both of the individual results. The estimate of the theoretical uncertainty is also investigated in scenarios with more than one mass scale. A significantly enhanced uncertainty is found in scenarios where the gluino is substantially heavier than the scalar top quarks. The uncertainty estimate presented in this paper will be part of the public code FeynHiggs.

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The MSSM without gluinos; an effective field theory for the stop sector

Cited by 11 publications

References 92 publications

Completing the scalar and fermionic universal one-loop effective action

Completing the scalar and fermionic universal one-loop effective action

Theoretical uncertainties in the MSSM Higgs boson mass calculation

Theoretical uncertainties in the MSSM Higgs boson mass calculation

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