Phenomenological viability of neutralino dark matter in. In the most general framework with minimal field content and rparity. The status of the minimal supersymmetric standard model and beyond. In the most general framework with minimal eld content and rparity conservation, the mssm is a 124parameter model henceforth called mssm124. If the theory is correct, supersymmetric particles should appear in. Pierce stanford linear accelerator center stanford university stanford, california 94309, usa jonathan a. Soft supersymmetry breaking and the supersymmetric. Aps we reexamine the stop coannihilation scenario of the minimal supersymmetric standard model, wherein a binolike lightest supersymmetric particle has a thermal relic density set by coannihilations with a scalar partner of the top quark in the early universe. The first step towards trying to build a more complete theory is the minimal supersymmetric standard model mssm. These new particles would solve a major problem with the standard model fixing the mass of the higgs boson. Search for minimal supersymmetric standard model higgs.
The minimal supersymmetric standard model mssm with universal soft breaking terms has a negligible effect on the rare cu. Oneloop effects of minimal supersymmetric standard model. The minimal supersymmetric standard model with cp phases. The minimal supersymmetric standard model mssm csaba cs aki 1 center for theoretical physics laboratory for nuclear science and department of physics massachusetts institute of technology cambridge, ma 029, usa abstract the structure of the mssm is. After an introduction to the model, the higgs sector and the neutralino sector are discussed in detail. In the nextto minimal supersymmetric standard model nmssm 1, an additional gauge singlet super. This lower limit was particularly low for the complex minimal supersymmetric standard model, since higgs bosons described by this theory can be trickier to produce in colliders. We first motivate the particle content of the theory by examining the quantum numbers of the known standard model particles and by the requirement of anomaly cancellation.
As an explicit model, the minimal supersymmetric standard model mssm is studied in this paper. The non minimal supersymmetric standard model nmssm 1, where the particle content of the minimal supersymmetric standard model mssm 2 is extended by the addition of a gauge singlet chiral super. Renormalization group invariants in the minimal supersymmetric. Particle spectrum in the nonminimal supersymmetric. We study new physics effects on b decay processes including a final. The minimal supersymmetric extension of the standard model mssm consists of taking the.
Mssm is the minimal supersymmetrical model as it considers only the minimum number of new particle states and new interactions consistent with phenomenology. Topics covered include field content of the mssm, electroweak symmetry breaking, the. Flavour violation within the minimal supersymmetric standard model the minimal supersymmetric standard model mssm is a quantum field theory which extends the standard model. We have calculated cross sections and decay branching ratios at the oneloop level using the gracesusyloop system 59. Flavour violation within the minimal supersymmetric. A study of lepton flavour violating process h l in minimal.
It was proposed to solve, amongst other things, the hierarchy problem. We first motivate the particle content of the theory by examining the quantum numbers of the known standard model particles and by the requirement of. The mssm removes dangerous contributions to the higgs mass provided that the superpartners of the known particles are not too far above the weak scale. For the sequential standard model, a z the minimal supersymmetric standard model mssm ssm mass up to 1. The minimal supersymmetric standard model mssm construction. Standard model, basic supersymmetry algebra and its representations are considered as prerequisites. The main symmetry content is described by a slavnovtaylor identity sr 0, 1 where f denotes the generating functional of the oneparticle. Supersymmetry pairs bosons with fermions, so every standard model particle has a superpartner yet undiscovered.
The minimal supersymmetric standard model mssm is an extension to the standard model that realizes supersymmetry. This theory annexes a new symmetry, this is reason for the name of the theory. Particles and fields 599 march 1998 with 12 reads how we measure reads. Supersymmetry is an extension of the standard model that aims to fill some of the gaps. We study, in the minimal supersymmetric standard model, the electroweak symmetry breaking conditions obtained from the oneloop effective potential. Maarten boonekamp, marcela carena, seong youl choi.
Standard model, where supersymmetric masses lie below a few tev, provides simple example of successful gauge. Once the particle content is fixed we can write down the most general renormalizable superpotential. We therefore study a general model with nonuniversal. Minimal supersymmetric standard model now let us turn to the model realizing the idea of supersymmetry. Quest for unification observational motivation dark matter candidate neutrino mass. Renormalization of the minimal supersymmetric standard model. Quark sector 88 540 90 electroweak interactions of hadrons 83, 89 546 91 neutrino masses 89 555 92 solitons and monopoles 84 558 93 instantons and theta vacua 92 571 94 quarks and theta vacua 77, 83, 93 582 95 supersymmetry 69 590 96 the minimal supersymmetric standard model 89, 95 602 97 grand. The lightest supersymmetric particle is a promising although not the unique candidate for the dark matter 16,17. Standard model, basic supersymmetry algebra and its. Cosmology of the nexttominimal supersymmetric standard model.
The first realistic supersymmetric version of the standard model was proposed in 1977 by pierre fayet and is known as the minimal supersymmetric standard model or mssm for short. This is the most minimal extension to the standard model that respects an additional spacetime symmetry, called supersymmetry. On the other hand, no direct evidence of new physics beyond the standard model has been found, yet. The nextto minimal supersymmetric extension of the standard model nmssm is one of the most favored supersymmetric models. Only one fermionic generator n 1 for the supersymmetry. Further aspects of dark matter can be found in ref.
Correspondingly, therefore, quite accurate calculations of the physical observables are required. The minimal supersymmetric standard model mssm is a theory that realizes supersymmetry with the least amount of new particles and interactions compared to the standard model, and is the theory we will focus on in the rest of this paper. There are no particles in the sm that can be superpartners susy associates known bosons with new fermions and known fermions with new bosons even number of the higgs doublets min 2. The gluino sector contains a phase j3 in the gluino mass term. Searching for beyond the minimal supersymmetric standard. Neutron and lepton electric dipole moments in the minimal. Matchev and renjie zhang department of physics and astronomy johns hopkins university 3400 n. Gauge supermultiplets in the minimal supersymmetric standard model. Box 9500, 2300 ra leiden, the netherlands september 16, 2016 abstract symmetry breaking in realistic supersymmetric theories has proven to be di cult without the introduction of explicit supersymmetry breaking terms. Minimal supersymmetric standard model 15 how to discover susy today.
Decide whether you want the susy particles to be produced in pairs or not i. It predicts a partner particle for each particle in the standard model. Supersymmetry and the minimal supersymmetric standard model. The higgs sector of the complex minimal supersymmetric. The simplest in this species is the minimal supersymmetric standard model mssm 2, 3. A description of the galactic center excess in the minimal. Theoretical, experimental, and cosmological constraints are studied. In the next section, i will list several problems apparent in the sm which prohibits it from laying claim to being the ultimate theory.
In short, the mssm predicts that each standard model particle has a supersymmetric counterpart with. Tauonic b decays in the minimal supersymmetric standard model. The resulting e ective eld theory is therefore a twohiggsdoublet model and the. I analyze two limiting cases of the model, characterized.
Supersymmetrize the intermediate legs of this process 3. Relic density of dark matter in the nextto minimal supersymmetric standard model to cite this article. Minimal supersymmetric standard model yasaman farzan ipm, tehran. An acceptable phenomenology occurs only at exceptional points and small perturbations around. Muoniumantimuonium oscillations in an extended minimal.
The topics covered include particle content, structure of. Pdf oneloop minimization conditions in the minimal. Muoniumantimuonium oscillations in an extended minimal supersymmetric standard model. Electron anomalous magnetic moment experiments majorana fermions minimal supersymmetric standard model muoniumanitmuonium time evolution muoniumantimuonium oscillation neutrino masses and mixings see. We therefore study a general model with nonuniversal soft breaking terms constrained by vacuum stability and the experimental upper bound on the mass difference of the neutral charm mesons. However such a superpotential will contain terms breaking lepton and baryon number. In section 3, i will try to provide some motivation as to why the next step should be a supersymmetric extension for the sm. Still, there are several reasons to believe that new physics should. References martin, a supersymmetric primer, hepph9709356 last update peskins lecture notes.
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