Searching for supersymmetry: the μνSSM

López-Fogliani, Daniel E.; Muñoz, Carlos

doi:10.1140/epjst/e2020-000114-9

Cited by 23 publications

(29 citation statements)

References 134 publications

(323 reference statements)

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“…However, the three left sneutrinos are almost decoupled, and we are left with the doublet-like pseudoscalar and the three right sneutrinos contributing to this channel. The latter states can be even lighter than the SM-like Higgs [6,69]. The predictions of these scenarios could be constrained with the ATLAS searches [70].…”

Section: Constraints From the Lhcmentioning

confidence: 96%

“…They can be used as an additional source of masses for theŜ fields Table 1 Chiral superfields in UμνSSM models and their quantum numbers, for the solution in Eq. (6) with the presence of the extra quark singletsK i andK c i , i = 1, 2, 3. The indexes i , α, α and α correspond to the number of different singlet superfields.…”

Section: The Superpotential Of Uμνssm Modelsmentioning

confidence: 99%

“…Of these terms, the first three are characteristic of the 'μ from ν' supersymmetric standard model (μνSSM) [5] (for a recent review, see Ref. [6]), the fourth term gives Majorana masses for RH neutrinos, and the fifth is a tadpole term for them with t i of dimension mass squared.…”

Section: Introductionmentioning

confidence: 99%

“…Studies of interesting signals of the μνSSM at the large hadron collider (LHC) were carried out in the literature, and can be found summarized in Ref. [6]. They were focused on the three characteristic terms of the model, written in the last line of W μνSSM above.…”

Section: Introductionmentioning

confidence: 99%

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$$U(1)'$$ extensions of the $$\mu \nu \mathrm{SSM}$$

et al. 2021

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In the $$\mu \nu $$ μ ν SSM, the presence of R-parity violating couplings involving right-handed (RH) neutrinos solves simultaneously the $$\mu $$ μ - and $$\nu $$ ν -problems. We explore extensions of the $$\mu \nu $$ μ ν SSM adding a $$U(1)'$$ U ( 1 ) ′ gauge group, which provides the RH neutrinos with a non-vanishing charge. In these models, dubbed U$$\mu \nu $$ μ ν SSM, the anomaly cancellation conditions impose the presence of exotic quarks in the spectrum that are vector-like under the standard model (SM) gauge group: either three pairs SU(2) quark singlets, or a pair of quark singlets together with a pair of quark doublets. Several singlets under the SM group can also be present, with the $$U(1)'$$ U ( 1 ) ′ charges making distinctions among them, and therefore allowing different types of couplings. Some of these singlets dynamically generate Majorana masses for the RH neutrinos, and others can be candidates for dark matter. The useful characteristics of models with $$U(1)'$$ U ( 1 ) ′ s are also present in U$$\mu \nu $$ μ ν SSM models: baryon-number-violating operators as well as explicit Majorana masses and $$\mu $$ μ terms are forbidden, and the domain wall problem is avoided. The phenomenology of U$$\mu \nu $$ μ ν SSM models is very rich. We analyze the experimental constraints on their parameter space, specially on the mass and mixing of the new $$Z'$$ Z ′ boson. In addition to the exotic quarks, which can hadronize inside the detector or decay producing SM particles, the U$$\mu \nu $$ μ ν SSM models can also have new signals such as decays of the $$Z'$$ Z ′ to sparticle pairs like right sneutrinos, charginos or neutralinos. Besides, $$Z'$$ Z ′ and Higgs mediated annihilations and interactions with the visible sector of WIMP dark matter particles, can also be present.

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Section: Constraints From the Lhcmentioning

confidence: 96%

Section: The Superpotential Of Uμνssm Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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$$U(1)'$$ extensions of the $$\mu \nu \mathrm{SSM}$$

et al. 2021

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“…As framework to study these signals we consider the recently proposed UμνSSM [7], 1 which is a U (1) extension of the 'μ from ν' supersymmetric standard model (μνSSM) [10] (for a recent review, see Ref. [11]). In such a framework the three decay modes (diboson, and exotic di/multiboson) are present.…”

Section: Introductionmentioning

confidence: 99%

Exotic diboson $$Z'$$ decays in the U$$\mu \nu $$SSM

et al. 2021

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Searches for new leptophobic resonances at high energy colliders usually target their decay modes into pairs of light quarks, top quarks, or standard model bosons. Additional decay modes may also be present, producing signatures to which current searches are not sensitive. We investigate the performance of generic searches that look for resonances decaying into two large-radius jets. As benchmark for our analysis we use a supersymmetric $$\text {U}(1)'$$ U ( 1 ) ′ extension of the Standard Model, the so-called U$$\mu \nu $$ μ ν SSM, where all the SM decay modes of the $$Z'$$ Z ′ boson take place, plus additional (cascade) decays into new scalars. The generic searches use a generic multi-pronged jet tagger and take advantage of the presence of b quarks in the large-radius jets, and are sensitive to all these $$Z'$$ Z ′ decay modes (except into light quarks) at once. For couplings that are well below current experimental constraints, these generic searches are sensitive at the $$3\sigma -4\sigma $$ 3 σ - 4 σ level with Run 2 LHC data.

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Soft supersymmetry breaking as the sole origin of neutrino masses and lepton number violation

Joshipura,

Patel

2024

J. High Energ. Phys.

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We discuss a scenario in which the supergravity induced soft terms, conventionally used for breaking supersymmetry, also lead to non-zero Majorana neutrino masses. The soft terms lead to the spontaneous violation of the lepton number at the gravitino mass scale m3/2 which in turn leads to (i) the Majorana masses of $$ \mathcal{O} $$ O (m3/2) for the right-handed neutrinos and (ii) the R-parity breaking at the same scale. The former contributes to light neutrino masses through the type I seesaw mechanism, while the latter adds to it through neutrino-neutralino mixing. Both contributions can scale inversely with respect to m3/2 given that gaugino and Higgsino masses are also of order m3/2. Together, these two contributions adequately explain observed neutrino masses and mixing. One realization of the scenario also naturally leads to a μ parameter of $$ \mathcal{O} $$ O (m3/2). Despite the lepton number symmetry breaking close to the weak scale, the Majoron in the model exhibits very weak coupling to leptons, satisfying existing constraints on Majoron-lepton interactions. The right-handed neutrinos in the model have a large coupling to Higgsinos. This coupling and the relatively large heavy-light neutrino mixing induced through the seesaw mechanism may lead to the observable signals at colliders in terms of displaced vertices.

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Searching for supersymmetry: the μνSSM

Cited by 23 publications

References 134 publications

$$U(1)'$$ extensions of the $$\mu \nu \mathrm{SSM}$$

$$U(1)'$$ extensions of the $$\mu \nu \mathrm{SSM}$$

Exotic diboson $$Z'$$ decays in the U$$\mu \nu $$SSM

Soft supersymmetry breaking as the sole origin of neutrino masses and lepton number violation

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