Dark matter decay to neutrinos

Argüelles, Carlos A.; Delgado, Diyaselis; Friedlander, Avi; Kheirandish, Ali; Safa, Ibrahim; Vincent, Aaron C.; White, Henry

doi:10.1103/physrevd.108.123021

Cited by 8 publications

(1 citation statement)

References 104 publications

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“…The IceCube Neutrino Observatory [61][62][63] and the large high altitude air shower observatory (LHAASO) [64] also searched for decaying dark matter with masses above PeV and set competitive limits. Future neutrino experiments will extend the search for VHDM to ≳ 10 12 GeV [65].…”

Section: Jcap03(2024)024mentioning

confidence: 99%

Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data

Song,

Murase,

Kheirandish

2024

J. Cosmol. Astropart. Phys.

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Galaxy clusters are promising targets for indirect detection of dark matter thanks to the large dark matter content. Using 14 years of Fermi-LAT data from seven nearby galaxy clusters, we obtain constraints on the lifetime of decaying very heavy dark matter particles with masses ranging from 103 GeV to 1016 GeV. We consider a variety of decaying channels and calculate prompt gamma rays and electrons/positrons from the dark matter. Furthermore, we take into account electromagnetic cascades induced by the primary gamma rays and electrons/positrons, and search for the resulting gamma-ray signals from the directions of the galaxy clusters. We adopt a Navarro-Frenk-White profile of the dark matter halos, and use the profile likelihood method to set lower limits on the dark matter lifetime at a 95% confidence level. Our results are competitive with those obtained through other gamma-ray observations of galaxy clusters and provide complementary constraints to existing indirect searches for decaying very heavy dark matter.

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Section: Jcap03(2024)024mentioning

confidence: 99%

Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data

Song,

Murase,

Kheirandish

2024

J. Cosmol. Astropart. Phys.

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Phenomenology of superheavy decaying dark matter from string theory

Allahverdi,

Arina,

Chianese

et al. 2024

J. High Energ. Phys.

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We study the phenomenology of superheavy decaying dark matter with mass around 1010 GeV which can arise in the low-energy limit of string compactifications. Generic features of string theory setups (such as high scale supersymmetry breaking and epochs of early matter domination driven by string moduli) can accommodate superheavy dark matter with the correct relic abundance. In addition, stringy instantons induce tiny R-parity violating couplings which make dark matter unstable with a lifetime well above the age of the Universe. Adopting a model-independent approach, we compute the flux and spectrum of high-energy gamma rays and neutrinos from three-body decays of superheavy dark matter and constrain its mass-lifetime plane with current observations and future experiments. We show that these bounds have only a mild dependence on the exact nature of neutralino dark matter and its decay channels. Applying these constraints to an explicit string model sets an upper bound of $$ \mathcal{O} $$ O (0.1) on the string coupling, ensuring that the effective field theory is in the perturbative regime.

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Finite modular majoron

Jung,

Kawamura

2024

J. High Energ. Phys.

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We point out that the accidental U(1)B−L symmetry can arise from a finite modular symmetry ΓN in the type-I seesaw. The finite modular symmetry is spontaneously broken in such a way that the residual $$ {\mathbb{Z}}_N^T $$ ℤ N T discrete symmetry, associated with the T-transformation which shifts the modulus τ → τ + 1, remains unbroken. This discrete $$ {\mathbb{Z}}_N^T $$ ℤ N T symmetry mimics U(1)B−L, and hence the majoron appears as a pseudo Nambu-Goldstone boson of U(1)B−L. Without introducing additional interactions, the modulus τ can be stabilized by the Coleman-Weinberg (CW) potential given by the Majorana mass terms of the right-handed neutrinos. We study cosmological implications of the majoron, with particular interests in the dark matter and dark radiation, where the latter may alleviate the Hubble tension. We also find that the CW potential can have a wide range of nearly exponential shape which prevents τ from overshooting, and makes the amount of dark radiation not too large.

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Dark matter decay to neutrinos

Cited by 8 publications

References 104 publications

Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data

Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data

Phenomenology of superheavy decaying dark matter from string theory

Finite modular majoron

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