$$M_W$$, dark matter and $$a_\mu $$ in the NMSSM

Domingo, Florian; Ellwanger, Ulrich; Hugonie, Cyril

doi:10.1140/epjc/s10052-022-11059-5

Cited by 23 publications

(15 citation statements)

References 121 publications

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“…For illustrative purposes, the results are shown for a set of two parameter points, one obtained from a simple scan, which will be described in the next paragraph, and one taken from the literature. For a full investigation of the viable parameter space where the NMSSM can simultaneously explain the (g − 2) µ data, the Higgs data, the W mass, and where the lightest neutralino is still a good lightest supersymmetric particle (LSP) and Dark Matter candidate, we refer the reader to the recent studies [77,78] for the NMSSM, and to [4] for the MSSM. Finally, we compare the W -mass prediction in NMSSMCALC with the one obtained from the public NMSSM spectrum generators FlexibleSUSY, NMSSMTools and SARAH/SPheno.…”

Section: Numerical Analysismentioning

confidence: 99%

“…The first point, P1, was already discussed in Section 5.1 and features rather light electroweakinos. The second, BP3, was introduced in [78] 3 . This parameter point is characterized by large one-loop corrections to the W boson mass due to very light sleptons with masses of O(100 GeV).…”

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confidence: 99%

“…Therefore, both chosen parameter points give the opportunity to compare the four considered M W codes under rather extreme conditions. For convenience, we reprint the input parameters for BP3 from [78]…”

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confidence: 99%

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Two-loop $$ \mathcal{O} $$((αt + αλ + ακ)2) corrections to the Higgs boson masses in the CP-violating NMSSM

Dao

Gabelmann

Mühlleitner

et al. 2021

J. High Energ. Phys.

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We present our computation of the $$ \mathcal{O} $$ O ((αt + αλ + ακ)2) two-loop corrections to the Higgs boson masses of the CP-violating Next-to-Minimal Supersymmetric Standard Model (NMSSM) using the Feynman-diagrammatic approach in the gaugeless limit at vanishing external momentum. We choose a mixed $$ \overline{\mathrm{DR}} $$ DR ¯ -on-shell (OS) renormalisation scheme for the Higgs sector and apply both $$ \overline{\mathrm{DR}} $$ DR ¯ and OS renormalisation in the top/stop sector. For the treatment of the infrared divergences we apply and compare three different regularisation methods: the introduction of a regulator mass, the application of a small momentum expansion, and the inclusion of the full momentum dependence. Our new corrections have been implemented in the Fortran code NMSSMCALC that computes the Higgs mass spectrum of the CP-conserving and CP-violating NMSSM as well as the Higgs boson decays including the state-of-the-art higher-order corrections. Our numerical analysis shows that the newly computed corrections increase with rising λ and κ, remaining overall below about 3% compared to our previously computed $$ \mathcal{O} $$ O (αt(αt + αs)) corrections, in the region compatible with perturbativity below the GUT scale. The renormalisation scheme and scale dependence is of typical two-loop order. The impact of the CP-violating phases in the new corrections is small. We furthermore show that the Goldstone Boson Catastrophe due to the infrared divergences can be treated in a numerically efficient way by introducing a regulator mass that approximates the momentum-dependent results best for squared mass values in the permille range of the squared renormalisation scale. Our results mark another step forward in the program of increasing the precision in the NMSSM Higgs boson observables.

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Section: Numerical Analysismentioning

confidence: 99%

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confidence: 99%

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Two-loop $$ \mathcal{O} $$((αt + αλ + ακ)2) corrections to the Higgs boson masses in the CP-violating NMSSM

Dao

Gabelmann

Mühlleitner

et al. 2021

J. High Energ. Phys.

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“…Among the relevant isotopes that still present large uncertainties, one can identify neutron-magic nuclei which act as s-process bottlenecks [2]. These nuclei feature very low (n,γ) cross sections and the accuracy of the TOF experiments is limited by the dominant neutron scattering background.…”

Section: (Nγ) Measurements For the S-process: Challenges And Solutionsmentioning

confidence: 99%

“…Experimental efforts are also focused on the measurement of unstable nuclei which act as branchings of the s-process and yield a local isotopic pattern which is very sensitive to the physical conditions of the stellar environment [1]. The limited sample mass available and the high background induced by the sample activity represent the major challenges to experimentally access the (n,γ) cross sections of these isotopes [2]. To overcome these limitations, new facilities with higher neutron fluxes are needed.…”

Section: (Nγ) Measurements For the S-process: Challenges And Solutionsmentioning

confidence: 99%

New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements

Lerendegui-Marco¹,

Babiano-Suárez²,

Balibrea-Correa³

et al. 2023

EPJ Web Conf.

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Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (∼mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n,γ) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOFEAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,γ) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction 79Se(n,γ).

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Status of the singlino-dominated dark matter in general Next-to-Minimal Supersymmetric Standard Model

Cao

Jia

Meng

et al. 2023

J. High Energ. Phys.

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With the rapid progress of dark matter direct detection experiments, the attractiveness of the popular bino-dominated dark matter in economical supersymmetric theories is fading. As an alternative, the singlino-dominated dark matter in general Next-to-Minimal Supersymmetric Standard Model (NMSSM) is paying due attention. This scenario has the following distinct characteristics: free from the tadpole problem and the domain-wall problem of the NMSSM with a Z3-symmetry, predicting more stable vacuum states than the Z3-NMSSM, capable of forming an economical secluded dark matter sector to yield the dark matter experimental results naturally, and readily weaken the restrictions from the LHC search for SUSY. Consequently, it can explain the muon g-2 anomaly in broad parameter space that agrees with various experimental results while simultaneously breaking the electroweak symmetry naturally. In this study, we show in detail how the scenario coincides with the experiments, such as the SUSY search at the LHC, the dark matter search by the LZ experiment, and the improved measurement of the muon g-2. We provide a simple and clear picture of the physics inherent in the general NMSSM.

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$$M_W$$, dark matter and $$a_\mu $$ in the NMSSM

Cited by 23 publications

References 121 publications

Two-loop $$ \mathcal{O} $$((αt + αλ + ακ)2) corrections to the Higgs boson masses in the CP-violating NMSSM

Two-loop $$ \mathcal{O} $$((αt + αλ + ακ)2) corrections to the Higgs boson masses in the CP-violating NMSSM

New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements

Status of the singlino-dominated dark matter in general Next-to-Minimal Supersymmetric Standard Model

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