Showing papers by "Abdelhak Djouadi published in 2022"
DOI•
18 Apr 2022
TL;DR: In this paper , the authors show that a model with two doublets and a light pseudoscalar Higgs particle can simultaneously explain the possible M W and ( g − 2) µ anomalies and accounts for the weakly interacting massive particle that could be responsible of the dark matter in the universe.
Abstract: The new measurement of the W boson mass performed by the CDF experiment at the Tevatron shows a significant deviation not only with the expectation in the Standard Model but also with other precision measurements performed at LEP, the Tevatron and the LHC. We nevertheless take this new measurement at face value and interpret it as an effect of new physics. We particularly try to link it with other possible anomalies such as the recent muon g − 2 and consider a scenario that addresses some shortcomings of the Standard Model. We show that a model with two doublets and a light pseudoscalar Higgs fields, supplemented by a stable isosinglet fermion, can simultaneously explain the possible M W and ( g − 2) µ anomalies and accounts for the weakly interacting massive particle that could be responsible of the dark matter in the universe.
19 citations
TL;DR: In this article , a model with two doublets and a light pseudoscalar Higgs fields, supplemented by a stable isosinglet fermion, was proposed to explain the possible $M_W$ and $g-2)_\mu anomalies and accounts for the weakly interacting massive particle that could be responsible of the dark matter in the universe.
Abstract: The new measurement of the $W$ boson mass performed by the CDF experiment at the Tevatron shows a significant deviation not only with the expectation in the Standard Model but also with other precision measurements performed at LEP, the Tevatron and the LHC. We nevertheless take this new measurement at face value and interpret it as an effect of new physics. We particularly try to link it with other possible anomalies such as the recent muon $g-2$ and consider a scenario that addresses some shortcomings of the Standard Model. We show that a model with two doublets and a light pseudoscalar Higgs fields, supplemented by a stable isosinglet fermion, can simultaneously explain the possible $M_W$ and $(g-2)_\mu$ anomalies and accounts for the weakly interacting massive particle that could be responsible of the dark matter in the universe.
16 citations
TL;DR: In this article , the authors show that a model with two doublets and a light pseudoscalar Higgs particle can simultaneously explain the possible M W and ( g − 2) µ anomalies and accounts for the weakly interacting massive particle that could be responsible of the dark matter in the universe.
Abstract: The new measurement of the W boson mass performed by the CDF experiment at the Tevatron shows a significant deviation not only with the expectation in the Standard Model but also with other precision measurements performed at LEP, the Tevatron and the LHC. We nevertheless take this new measurement at face value and interpret it as an effect of new physics. We particularly try to link it with other possible anomalies such as the recent muon g − 2 and consider a scenario that addresses some shortcomings of the Standard Model. We show that a model with two doublets and a light pseudoscalar Higgs fields, supplemented by a stable isosinglet fermion, can simultaneously explain the possible M W and ( g − 2) µ anomalies and accounts for the weakly interacting massive particle that could be responsible of the dark matter in the universe.
13 citations
30 Dec 2022
TL;DR: In this paper , the Higgs sector is extended to contain two Higgs doublet doublets, with the four types of possibilities to couple to standard fermions, as well as an additional light pseudoscalar Higgs boson which mixes with one of the two doublets.
Abstract: We perform a comprehensive study of a model in which the Higgs sector is extended to contain two Higgs doublet fields, with the four types of possibilities to couple to standard fermions, as well as an additional light pseudoscalar Higgs boson which mixes with one of the two doublets. This 2HD+a model includes also a stable isosinglet massive fermion that has the correct thermal relic abundance to account for the dark matter in the Universe. We first discuss the theoretical constraints to which the model is subject and then perform a detailed study of the phenomenological constraints. In particular, we discuss the bounds from the LHC in the search for light and heavy scalar resonances and invisible states and those from high precision measurements in the Higgs, electroweak and flavor sectors, addressing the possibility of explaining the deviation from the standard expectation of the anomalous magnetic moment of the muon and the W -boson mass recently observed at Fermilab. We also summarize the astrophysical constraints from direct and indirect detection dark matter experiments. We finally conduct a thorough analysis of the cosmic phase transitions and the gravitational wave spectrum that are implied by the model and identify the parameter space in which the electroweak vacuum is reached after single and multiple phase transitions. We then discuss the prospects for observing the signal of such gravitational waves in near future experiments such as LISA, BBO or DECIGO.
3 citations
3 citations
TL;DR: In this paper , a non-supersymmetric SO(10) Grand Unification Theory with a very high energy intermediate symmetry breaking scale in which not only gauge but also Yukawa coupling unification are enforced via suitable threshold corrections and matching conditions.
Abstract: Abstract We study a non-supersymmetric SO(10) Grand Unification Theory with a very high energy intermediate symmetry breaking scale in which not only gauge but also Yukawa coupling unification are enforced via suitable threshold corrections and matching conditions. For gauge unification, we focus on a few symmetry breaking patterns with the intermediate gauge groups $$\text {SU}(4)_{\textrm{C}} \times \text {SU}(2)_{\textrm{L}} \times \text {SU}(2)_{\textrm{R}}$$ SU ( 4 ) C × SU ( 2 ) L × SU ( 2 ) R (Pati–Salam) and $$\text {SU}(3)_{\textrm{C}} \times \text {SU}(2)_{\textrm{L}} \times \text {SU}(2)_{\textrm{R}}\times \text {U}(1)_{{\textrm{B}}-{\textrm{L}}}$$ SU ( 3 ) C × SU ( 2 ) L × SU ( 2 ) R × U ( 1 ) B - L (minimal left-right symmetry) assuming an additional global U(1) Peccei–Quinn symmetry, and having the Standard Model supplemented by a second Higgs doublet field at the electroweak scale. We derive the conditions as well as the approximate analytical solutions for the unification of the gauge coupling constants at the two-loop level and discuss the constraints from proton decay on the resulting high scale. Specializing to the case of the Pati–Salam intermediate breaking pattern, we then impose also the unification of the Yukawa couplings of third generation fermions at the high scale, again at the two-loop level. In the considered context, Yukawa unification implies a relation between the fermion couplings to the 10- and 126-dimensional scalar representations of the SO(10) group. We consider one such possible relation which is obtainable in an $$\text {E}_6$$ E 6 model where the previous two scalar fields are part of a single multiplet. Taking into account some phenomenological features such as the absence of flavor changing neutral currents at tree-level, we derive constraints on the parameters of the low energy model, in particular on the ratio of the two Higgs doublets vacuum expectation values $$\tan \beta $$ tan β .
1 citations
TL;DR: In this article , the authors discuss the constraints on supersymmetry that can be derived by a determination of the Higgs boson mass and couplings and quantify these constraints by using scans of the 19-parameter space of the so-called phenomenological minimal supersymmetric Standard Model.
Abstract: The study of the Higgs boson properties offers compelling perspectives for testing the effects of physics beyond the Standard Model and has deep implications for the LHC program and future colliders. Accurate determinations of the Higgs boson properties can provide us with a distinctively precise picture of the Higgs sector, set tight bounds, and predict ranges for the values of new physics model parameters. In this paper, we discuss the constraints on supersymmetry that can be derived by a determination of the Higgs boson mass and couplings. We quantify these constraints by using scans of the 19-parameter space of the so-called phenomenological minimal supersymmetric Standard Model. The fraction of scan points that can be excluded by the Higgs measurements is studied for the coupling measurement accuracies obtained in LHC run 2 and expected for the HL-LHC program and ${e}^{+}{e}^{\ensuremath{-}}$ colliders and contrasted with those derived from missing transverse energy searches at the LHC and from dark matter experiments.
1 citations
TL;DR: SuSpect3 as discussed by the authors is a C++ program that calculates the masses and couplings of the Higgs and supersymmetric particles predicted by the Minimal Supersymmetric Standard Model (MSSM).
TL;DR: In this article , the effects of QCD radiative corrections in Supersymmetric theories are discussed, and the main complications compared to standard QCD corrections are discussed in detail.
Abstract: I discuss the effects of QCD radiative corrections in Supersymmetric theories. After summarizing the SUSY– QCD lagrangian in the Minimal Supersymmetric extension of the Standard Model, I will discuss the new features introduced by SUSY, and the main complications compared to standard QCD corrections. I will then discuss a few examples of QCD calculations in SUSY theories, for standard processes and for processes involving SUSY particles including the extended Higgs sector. [Talk given at “QCD 97”, Montpellier 3-9 July 1997.]