Probing Scalar and Pseudoscalar Solutions to the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:math> Anomaly

Abu-Ajamieh, Fayez

doi:10.1155/2020/1751534

Cited by 9 publications

(7 citation statements)

References 87 publications

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“…approach [26,27], and later lepton-flavour violating interactions were also used [28,29].…”

Section: Magnetic Moment Of Light Leptonsmentioning

confidence: 99%

“…[13][14][15][16][17][18][19][20][21][22][23] for recent works on ALPs coupled to photons/leptons). ALPs in this mass range have been invoked for example as a possible solution for both the muon and the electron magnetic moment anomalies [24][25][26][27][28][29][30] and, interestingly, viable solutions to these anomalies require both electromagnetic and leptonic ALP interactions. Last but nor least, recent hints of the production of a 17 MeV boson in nuclear transitions [31][32][33][34] have also been interpreted in terms of an hypothetical new pseudo-scalar particle [23,35,36].…”

Section: Introductionmentioning

confidence: 99%

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Invisible decays of axion-like particles: constraints and prospects

Giacchino

Nardi

Raggi

2021

J. High Energ. Phys.

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Axion-like particles (ALPs) can provide a portal to new states of a dark sector. We study the phenomenology of this portal when the ALP mainly decays invisibly, while its interaction with the standard model sector proceeds essentially via its coupling to electrons and/or photons. We reanalyse existing limits from various collider and beam dump experiments, including in particular ALP production via electron/positron interactions, in addition to the usual production through ALP-photon coupling. We further discuss the interplay between these limits and the intriguing possibility of explaining simultaneously the muon and electron magnetic moment anomalies. Finally, we illustrate the prospects of ALP searches at the LNF positron fixed-target experiment PADME, and the future reach of an upgraded experimental setup.

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“…approach [26,27], and later lepton-flavour violating interactions were also used [28,29].…”

Section: Magnetic Moment Of Light Leptonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Invisible decays of axion-like particles: constraints and prospects

Giacchino

Nardi

Raggi

2021

J. High Energ. Phys.

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“…The predictions of muon g-2 excess from various simplified muonphilic DM models are based on their mediator types [40,[54][55][56][57][58]. In this appendix, we provide the exact expressions of additional muon g-2 contribution δa µ to the standard model prediction as the follows:…”

Section: The Muon G − 2 Excessmentioning

confidence: 99%

Muonphilic Dark Matter explanation of gamma-ray galactic center excess: a comprehensive analysis

Abdughani¹,

Fan²,

Lu³

et al. 2021

Preprint

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The Galactic center gamma-ray excess (GCE) is a long-standing unsolved problem. One of candidate solutions, the dark matter (DM) annihilation, has been recently tested with other astrophysical observations, such as AMS-02 electron-positron spectra, Fermi Dwarf spheroidal galaxies gamma ray data, and so on. It has been claimed that only the DM annihilation to a muon-pair, namely muonphilic DM, is compatible with the null detection of all the corresponding astrophysical measurements [Di Mauro and Winkle (2021)]. On the other hand, a muonphilic DM model may also lead to a signal in the recent muon g-2 measurement or the latest PandaX-4T limit. In this work, we comprehensively study interactions between DM and muon, including different DM and mediator spins. In agreement with GCE (not only 2µ but also 4µ final states), we test these interactions against all the thermal DM constraints. Our results show that only the parameter space near the mediator resonance region can explain GCE and relic density simultaneously. Regardless of the DM spin, only the interactions with the spin-0 mediator can explain the recent muon g-2 excess on top of GCE, relic density, and other DM and mediator constraints.

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“…Note that when evaluating the integrals in (30), the cut of the ALP momentum, p a > p a,min , must be considered, see Eq. (20).…”

Section: A Angular and Energy Spectra Of Alpmentioning

confidence: 99%

Explaining the MiniBooNE Anomalous Excess via Leptophilic ALP-Sterile Neutrino Coupling

Chang,

Chen,

et al. 2021

Preprint

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Recently, the MiniBooNE experiment at Fermilab has updated the results with increased data and reported an excess of 560.6 ± 119.6 electron-like events (4.7σ) in the neutrino operation mode. In this paper, we propose a scenario to account for the excess where a Dirac-type sterile neutrino, produced by a charged kaon decay through the neutrino mixing, decays into a leptophilic axionlike particle ( ALP) and a muon neutrino. The electron-positron pairs produced from the ALP decays can be interpreted as electron-like events provided that their opening angle is sufficiently small. In our framework, we consider the ALP with a mass m a = 20 MeV and an inverse decay constant c e /f a = 10 −2 GeV −1 , allowed by the astrophysical and experimental constraints. Then, after integrating the predicted angular or visible energy spectra of the ALP to obtain the total excess event number, we find that our scenario with sterile neutrino masses within 150 MeV m N 380 MeV (150 MeV m N 180 MeV) and neutrino mixing parameters between 10 −10 |U µ4 | 2 10 −8 (3 × 10 −7 |U µ4 | 2 8 × 10 −7 ) can explain the MiniBooNE data.

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Probing Scalar and Pseudoscalar Solutions to the g−2 Anomaly

Abstract: I investigate a class of models with scalar and pseudoscalar solutions to the g−2 anomaly for both the muon and the electron over the mass range of perturbativity (mϕ≲50 GeV… Show more

Cited by 9 publications

References 87 publications

Invisible decays of axion-like particles: constraints and prospects

Invisible decays of axion-like particles: constraints and prospects

Muonphilic Dark Matter explanation of gamma-ray galactic center excess: a comprehensive analysis

Explaining the MiniBooNE Anomalous Excess via Leptophilic ALP-Sterile Neutrino Coupling

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