scholarly journals Cosmic-ray signatures of dark matter from a flavor dependent gauge symmetry model with neutrino mass mechanism

2020 ◽  
Vol 102 (8) ◽  
Author(s):  
Holger Motz ◽  
Hiroshi Okada ◽  
Yoichi Asaoka ◽  
Kazunori Kohri
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Neutrino Mass ◽  
Cosmic Ray ◽  
Symmetry Model

scholarly journals Neutrino lines from DM decay induced by high-scale seesaw interactions

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Rupert Coy ◽  
Thomas Hambye
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Neutrino Mass ◽  
Gauge Boson ◽  
High Scale ◽  
Abelian Gauge ◽  
Neutrino Telescopes ◽  
The Stability ◽  
Accidental Symmetry

Abstract If the stability of the dark matter (DM) particle is due to an accidental symmetry, nothing prevents UV physics from destabilising it by inducing DM decays suppressed by powers of the UV scale. The seesaw physics, presumably at the origin of neutrino mass, could induce such a decay. We show that if the seesaw scale lies around the usual Weinberg operator scale, the induced DM decay could generically lead to neutrino lines whose intensity is of the order of the present sensitivity of neutrino telescopes. We illustrate this possibility with models in which the DM is made of the gauge boson(s) of an abelian or non-abelian gauge symmetry.

scholarly journals Low scale U(1)X gauge symmetry as an origin of dark matter, neutrino mass and flavour anomalies

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Debasish Borah ◽  
Lopamudra Mukherjee ◽  
Soumitra Nandi
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Neutrino Mass ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Muon Anomalous Magnetic Moment ◽  
Particle Content ◽  
Anomaly Cancellation ◽  
Lepton Universality ◽  
The Standard Model

Abstract We study a generic leptophilic U(1)X extension of the standard model with a light gauge boson. The U(1)X charge assignments for the leptons are guided by lepton universality violating (LUV) observables in semileptonic b → sℓℓ decays, muon anomalous magnetic moment and the origin of leptonic masses and mixing. Anomaly cancellation conditions require the addition of new chiral fermions in the model, one of which acts as a dark matter (DM) candidate when it is stabilised by an additional $$ {\mathcal{Z}}_2 $$ Z 2 symmetry. From our analysis, we show two different possible models with similar particle content that lead to quite contrasting neutrino mass origin and other phenomenology. The proposed models also have the potential to address the anomalous results in b → cℓνℓ decays like R(D), R(D∗), electron anomalous magnetic moment and the very recent KOTO anomaly in the kaon sector. We also discuss different possible collider signatures of our models which can be tested in future.

scholarly journals Present and future status of light dark matter models from cosmic-ray electron upscattering

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
James B. Dent ◽  
Bhaskar Dutta ◽  
Jayden L. Newstead ◽  
Ian M. Shoemaker ◽  
Natalia Tapia Arellano
Keyword(s):  
Dark Matter ◽  
Cosmic Ray ◽  
Future Status

An excess radio signal in the Abell 4038 cluster

2020 ◽  
Vol 500 (4) ◽  
pp. 5583-5588
Author(s):  
Man Ho Chan ◽  
Chak Man Lee
Keyword(s):  
Dark Matter ◽  
Spectral Data ◽  
Cross Section ◽  
Radio Signal ◽  
Dark Matter Particle ◽  
Cosmic Ray ◽  
Annihilation Cross Section ◽  
Radio Continuum ◽  
Test Statistic ◽  
Dark Matter Annihilation

ABSTRACT In the past decade, various instruments, such as the Large Area Telescope (LAT) on the Fermi Gamma Ray Space Telescope, the Alpha Magnetic Spectrometer (AMS) and the Dark Matter Particle Explorer(DAMPE), have been used to detect the signals of annihilating dark matter in our Galaxy. Although some excesses of gamma rays, antiprotons and electrons/positrons have been reported and are claimed to be dark matter signals, the uncertainties of the contributions of Galactic pulsars are still too large to confirm the claims. In this paper, we report on a possible radio signal of annihilating dark matter manifested in the archival radio continuum spectral data of the Abell 4038 cluster. By assuming a thermal annihilation cross-section and comparing the dark matter annihilation model with the null hypothesis (cosmic ray emission without dark matter annihilation), we obtain very large test statistic (TS) values, TS > 45, for four popular annihilation channels, which correspond to more than 6σ statistical preference. This reveals a possible potential signal of annihilating dark matter. In particular, our results are also consistent with the recent claims of dark matter mass, m ≈ 30–50 GeV, annihilating via the $\rm b\bar{b}$ quark channel with the thermal annihilation cross-section. However, at this time, we cannot exclude the possibility that a better background cosmic ray model could explain the spectral data without recourse to dark matter annihilations.

scholarly journals A possible radio signal of annihilating dark matter in the Abell 4038 cluster

2019 ◽  
Vol 495 (1) ◽  
pp. L124-L128 ◽  
Author(s):  
Man Ho Chan ◽  
Chak Man Lee
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Radio Signal ◽  
Dark Matter Particle ◽  
Cosmic Ray ◽  
Annihilation Cross Section ◽  
Radio Continuum ◽  
Test Statistic ◽  
Large Area ◽  
Dark Matter Annihilation

ABSTRACT In the past decade, some telescopes [e.g. Fermi-Large Area Telescope (LAT), Alpha Magnetic Spectrometer(AMS), and Dark Matter Particle Explorer(DAMPE)] were launched to detect the signals of annihilating dark matter in our Galaxy. Although some excess of gamma-rays, antiprotons, and electrons/positrons have been reported and claimed as dark matter signals, the uncertainties of Galactic pulsars’ contributions are still too large to confirm the claims. In this Letter, we report a possible radio signal of annihilating dark matter manifested in the archival radio continuum spectral data of the Abell 4038 cluster. By assuming the thermal annihilation cross-section and comparing the dark matter annihilation model with the null hypothesis (cosmic ray emission without dark matter annihilation), we get very large test statistic values >45 for four popular annihilation channels, which correspond to more than 6.5σ statistical preference. This provides a very strong evidence for the existence of annihilating dark matter. In particular, our results also support the recent claims of dark matter mass m ≈ 30–50 GeV annihilating via the bb̄ quark channel with the thermal annihilation cross-section.

scholarly journals Dark matter as the origin of neutrino mass in the inverse seesaw mechanism

2021 ◽  
pp. 136609
Author(s):  
Sanjoy Mandal ◽  
Nicolás Rojas ◽  
Rahul Srivastava ◽  
José W.F. Valle
Keyword(s):  
Dark Matter ◽  
Neutrino Mass ◽  
Seesaw Mechanism
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