Lepton flavor violating Z′ explanation of the muon anomalous magnetic moment

Altmannshofer, Wolfgang; Chen, Chien-Yi; Dev, P. S. Bhupal; Soni, Amarjit

doi:10.1016/j.physletb.2016.09.046

Cited by 167 publications

(121 citation statements)

References 178 publications

(205 reference statements)

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“…(1.1)) wherein θ 23 is close to maximal and θ 13 is small. As mentioned above, this model can also explain the muon (g − 2) anomaly [77][78][79][80][81] for a range of Z µτ mass and g µτ consistent with collider constraints. We will further extend this model with a complex scalar, which will become a viable DM candidate.…”

Section: Jhep09(2016)147supporting

confidence: 68%

Neutrino mass, dark matter and anomalous magnetic moment of muon in a U 1 L μ − L τ $$ \mathrm{U}{(1)}_L{{}_{{}_{\mu}}}_{-}{{}_L}_{{}_{\tau }} $$ model

Biswas

Choubey

Khan

2016

J. High Energ. Phys.

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The observation of neutrino masses, mixing and the existence of dark matter are amongst the most important signatures of physics beyond the Standard Model (SM). In this paper, we propose to extend the SM by a local L µ −L τ gauge symmetry, two additional complex scalars and three right-handed neutrinos. The L µ − L τ gauge symmetry is broken spontaneously when one of the scalars acquires a vacuum expectation value. The L µ − L τ gauge symmetry is known to be anomaly free and can explain the beyond SM measurement of the anomalous muon (g − 2) through additional contribution arising from the extra Z µτ mediated diagram. Small neutrino masses are explained naturally through the Type-I seesaw mechanism, while the mixing angles are predicted to be in their observed ranges due to the broken L µ − L τ symmetry. The second complex scalar is shown to be stable and becomes the dark matter candidate in our model. We show that while the Z µτ portal is ineffective for the parameters needed to explain the anomalous muon (g − 2) data, the correct dark matter relic abundance can easily be obtained from annihilation through the Higgs portal. Annihilation of the scalar dark matter in our model can also explain the Galactic Centre gamma ray excess observed by Fermi-LAT. We show the predictions of our model for future direct detection experiments and neutrino oscillation experiments.

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Section: Jhep09(2016)147supporting

confidence: 68%

Neutrino mass, dark matter and anomalous magnetic moment of muon in a U 1 L μ − L τ $$ \mathrm{U}{(1)}_L{{}_{{}_{\mu}}}_{-}{{}_L}_{{}_{\tau }} $$ model

Biswas

Choubey

Khan

2016

J. High Energ. Phys.

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“…Unlike the scalar case, this kind of scenario offers a much richer collider phenomenology since one could assume gauge-like interactions (contrary to Yukawa-like interactions for spin-0 mediators) of the mediator with the SM light quarks and leptons, leading to visible signals, implying stronger constraints [223][224][225][226][227][228][229][230][231][232][233][234][235][236][237][238][239][240][241]. As a consequence we will consider a wider mass range, for both DM and the spin-1 mediator, in our analysis.…”

Section: Vector Dark Mattermentioning

confidence: 99%

The waning of the WIMP? A review of models, searches, and constraints

et al. 2018

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Weakly Interacting Massive Particles (WIMPs) are among the best-motivated dark matter candidates. No conclusive signal, despite an extensive search program that combines, often in a complementary way, direct, indirect, and collider probes, has been detected so far. This situation might change in near future due to the advent of one/multi-TON Direct Detection experiments. We thus, find it timely to provide a review of the WIMP paradigm with focus on a few models which can be probed at best by these facilities. Collider and Indirect Detection, nevertheless, will not be neglected when they represent a complementary probe.

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“…It has been noted, however, that gauging any difference between two lepton family numbers with an Abelian group leads to an anomaly free theory [468,469,469,470]. L µ − L τ is an explicit example which has been investigated in detail in [471][472][473][474][475][476][477][478][479][480][481]. The gauge group …”

Section: Existing Limitsmentioning

confidence: 99%

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

2018

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We review how the muon anomalous magnetic moment (g − 2) and the quest for lepton flavor violation are intimately correlated. Indeed the decay µ → eγ is induced by the same amplitude for different choices of in-and outgoing leptons. In this work, we try to address some intriguing questions such as:Which hierarchy in the charged lepton sector one should have in order to reconcile possible signals coming simultaneously from g − 2 and lepton flavor violation?What can we learn if the g − 2 anomaly is confirmed by the upcoming flagship experiments at FERMILAB and J-PARC, and no signal is seen in the decay µ → eγ in the foreseeable future? On the other hand, if the µ → eγ decay is seen in the upcoming years, do we need to necessarily observe a signal also in g − 2?.In this attempt, we generally study the correlation between these observables in a detailed analysis of simplified models. We derive master integrals and

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Lepton flavor violating Z′ explanation of the muon anomalous magnetic moment

Cited by 167 publications

References 178 publications

Neutrino mass, dark matter and anomalous magnetic moment of muon in a U 1 L μ − L τ $$ \mathrm{U}{(1)}_L{{}_{{}_{\mu}}}_{-}{{}_L}_{{}_{\tau }} $$ model

Neutrino mass, dark matter and anomalous magnetic moment of muon in a U 1 L μ − L τ $$ \mathrm{U}{(1)}_L{{}_{{}_{\mu}}}_{-}{{}_L}_{{}_{\tau }} $$ model

The waning of the WIMP? A review of models, searches, and constraints

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

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