Slepton production at $$e^+e^-$$ e + e - colliders in the complex MSSM: a full one-loop analysis

Heinemeyer, S.; Schappacher, C.

doi:10.1140/epjc/s10052-018-6009-4

Cited by 10 publications

(7 citation statements)

References 91 publications

(170 reference statements)

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“…The anticipated energies and integrated luminosities are listed in Table 8. The cross-section predictions are based on tree-level results, obtained as in [110,111], where it was shown that the full one-loop corrections can amount up to 10-20%. 6 We do not attempt any rigorous experimental analysis, but follow the idea that to a good approximation final states with the sum of the masses smaller than the center-of-mass energy can be detected [113][114][115].…”

Section: Hl-lhc Prospectsmentioning

confidence: 99%

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Improved $$(g-2)_\mu $$ measurements and supersymmetry

2020

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The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM) can account for variety of experimental data. The lighest supersymmetric particle (LSP), which we take as the lightest neutralino, $${\tilde{\chi }}_{1}^0$$ χ ~ 1 0 , can account for the observed Dark Matter (DM) content of the universe via coannihilation with the next-to-LSP (NLSP), while being in agreement with negative results from Direct Detection (DD) experiments. Owing to relatively small production cross-sections a comparably light EW sector of the MSSM is also in agreement with the unsuccessful searches at the LHC. Most importantly, the EW sector of the MSSM can account for the persistent $$3-4\,\sigma $$ 3 - 4 σ discrepancy between the experimental result for the anomalous magnetic moment of the muon, $$(g-2)_\mu $$ ( g - 2 ) μ , and its Standard Model (SM) prediction. Under the assumption that the $${\tilde{\chi }}_{1}^0$$ χ ~ 1 0 provides the full DM relic abundance we first analyze which mass ranges of neutralinos, charginos and scalar leptons are in agreement with all experimental data, including relevant LHC searches. We find an upper limit of $$\sim 600 \,\, \mathrm {GeV}$$ ∼ 600 GeV for the LSP and NLSP masses. In a second step we assume that the new result of the Run 1 of the “MUON G-2” collaboration at Fermilab yields a precision comparable to the existing experimental result with the same central value. We analyze the potential impact of the combination of the Run 1 data with the existing $$(g-2)_\mu $$ ( g - 2 ) μ data on the allowed MSSM parameter space. We find that in this case the upper limits on the LSP and NLSP masses are substantially reduced by roughly $$100 \,\, \mathrm {GeV}$$ 100 GeV . This would yield improved upper limits on these masses of $$\sim 500 \,\, \mathrm {GeV}$$ ∼ 500 GeV . In this way, a clear target could be set for future LHC EW searches, as well as for future high-energy $$e^+e^-$$ e + e - colliders, such as the ILC or CLIC.

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Section: Hl-lhc Prospectsmentioning

confidence: 99%

“…Including full one-loop corrections here as in[110,111] would have required to determine the preferred choice of the renormalization scheme for each point individually (see[112] for details), which goes beyond the scope of this analysis.…”

mentioning

confidence: 99%

Improved $$(g-2)_\mu $$ measurements and supersymmetry

2020

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“…[5] we had evaluated the cross-sections for the various SUSY pair production modes (based on Refs. [100,101]) for the energies currently foreseen in the run plans of the two colliders.…”

Section: Implications For Future Collidersmentioning

confidence: 99%

The new “MUON G-2” result and supersymmetry

2021

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The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM), with the lightest neutralino as Dark Matter (DM) candidate, can account for a variety of experimental data. This includes the DM content of the universe, DM direct detection limits, EW SUSY searches at the LHC and in particular the so far persistent $$3-4\,\sigma $$ 3 - 4 σ discrepancy between the experimental result for the anomalous magnetic moment of the muon, $$(g-2)_\mu $$ ( g - 2 ) μ , and its Standard Model (SM) prediction. The recently published “MUON G-2” result is within $${0.8}\,\sigma $$ 0.8 σ in agreement with the older BNL result on $$(g-2)_\mu $$ ( g - 2 ) μ . The combination of the two results was given as $$a_\mu ^{\mathrm{exp}} = (11 659 {206.1}\pm {4.1}) \times 10^{-10}$$ a μ exp = ( 11659 206.1 ± 4.1 ) × 10 - 10 , yielding a new deviation from the SM prediction of $$\Delta a_\mu = ({25.1}\pm {5.9}) \times 10^{-10}$$ Δ a μ = ( 25.1 ± 5.9 ) × 10 - 10 , corresponding to $${4.2}\,\sigma $$ 4.2 σ . Using this improved bound we update the results presented in Chakraborti et al. (Eur Phys J C 80(10):984, 2020) and set new upper limits on the allowed parameters space of the EW sector of the MSSM. We find that with the new $$(g-2)_\mu $$ ( g - 2 ) μ result the upper limits on the (next-to-) lightest SUSY particle are in the same ballpark as previously, yielding updated upper limits on these masses of $$\sim 750 \,\, \mathrm {GeV}$$ ∼ 750 GeV . In this way, a clear target is confirmed for future (HL-)LHC EW searches, as well as for future high-energy $$e^+e^-$$ e + e - colliders, such as the ILC or CLIC.

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“…The supersymmetric models [207][208][209] include the 2HDM as the limit of heavy sparticles. If the sfermions are relevant, additional contributions to the CP phase of the Yukawa coupling from loop diagrams are possible [210][211][212][213][214][215]. The first effect we might consider is the squark loop inducing the Higgs-gluon-gluon (HG µν,a G µν a ) vertex which contributes to the SP type CP-odd e-N interaction [see Fig.…”

Section: Constraints On New Physics Beyond Standard Modelmentioning

confidence: 99%

Electric dipole moment of Hg199 atom from P , CP
Yanase
¹
,
Yoshinaga
²
,
Higashiyama
³

et al. 2019
Phys. Rev. D
34
2
16
0
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We calculate the effect of the P, CP-odd electron-nucleon interaction on the electric dipole moment of the 199 Hg atom by evaluating the nuclear spin matrix elements in terms of the nuclear shell model. It is found that the neutron spin matrix element of the 199 Hg nucleus is Ψ| σnz|Ψ ≈ −0.4 with a dominant configuration of p 1/2 orbital neutron. We also derive constraints on the CP phases of Higgs-doublet models, supersymmetric models, and leptoquark models from the latest experimental limit |dHg| < 7.4 × 10 −30 e cm.

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Slepton production at $$e^+e^-$$ e + e - colliders in the complex MSSM: a full one-loop analysis

Cited by 10 publications

References 91 publications

Improved $$(g-2)_\mu $$ measurements and supersymmetry

Improved $$(g-2)_\mu $$ measurements and supersymmetry

The new “MUON G-2” result and supersymmetry

Electric dipole moment of Hg199 atom from P , CP
Yanase
¹
,
Yoshinaga
²
,
Higashiyama
³

et al. 2019
Phys. Rev. D
34
2
16
0
View full text Add to dashboard Cite

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Slepton production at $$e^+e^-$$ e + e - colliders in the complex MSSM: a full one-loop analysis

Cited by 10 publications

References 91 publications

Improved $$(g-2)_\mu $$ measurements and supersymmetry

Improved $$(g-2)_\mu $$ measurements and supersymmetry

The new “MUON G-2” result and supersymmetry

Electric dipole moment of Hg199 atom from P , CPYanase1, Yoshinaga2, Higashiyama3 et al. 2019Phys. Rev. D342160View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Electric dipole moment of Hg199 atom from P , CP
Yanase
¹
,
Yoshinaga
²
,
Higashiyama
³

et al. 2019
Phys. Rev. D
34
2
16
0
View full text Add to dashboard Cite