Neutrinos from captured dark matter annihilation in a galactic population of neutron stars

Bose, D.; Maity, Tarak Nath; Ray, Tirtha Sankar

doi:10.1088/1475-7516/2022/05/001

Cited by 20 publications

(6 citation statements)

References 110 publications

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“…IceCube has a very active program for the indirect detection of DM and can set the limits in SI/SD DM-nucleon cross-section for GeV-to-TeV parameter space. In recent times, several studies have probed the neutrinos originating from captured DM in the core of celestial objects [19,[21][22][23]43,[85][86][87].…”

Section: Discussionmentioning

confidence: 99%

Probing the Dark Matter Capture Rate in a Local Population of Brown Dwarfs with IceCube Gen 2

Bhattacharjee,

Calore

2024

Particles

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This study explores the potential for dark matter annihilation within brown dwarfs, investigating an unconventional mechanism for neutrino production. Motivated by the efficient accumulation of dark matter particles in brown dwarfs through scattering interactions, we focus on a mass range above 10 GeV, considering dark matter annihilation channels χχ→νν¯νν¯ through long-lived mediators. Using the projected sensitivity of IceCube Generation 2, we assess the detection capability of the local population of brown dwarfs within 20 pc and exclude dark matter-nucleon scattering with cross-sections as low as a few multiples of 10−36cm2.

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Section: Discussionmentioning

confidence: 99%

Probing the Dark Matter Capture Rate in a Local Population of Brown Dwarfs with IceCube Gen 2

Bhattacharjee,

Calore

2024

Particles

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“…When DM particles are captured in Sirius A and Sirius B, they will annihilate to pairs of long-lived particles. Considering the number of DM particles N (t) inside Sirius A or Sirius B at the time t, we have [43,[64][65][66][67][74][75][76][77][78][79][80][81][82][83]…”

Section: Dark Matter Annihilation Ratementioning

confidence: 99%

Multi-frequency test of dark matter annihilation into long-lived particles in Sirius

Chen

Xia

et al. 2023

J. Cosmol. Astropart. Phys.

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New long-lived particles produced at the colliders may escape from conventional particle detectors. Using satellites or ground telescopes, we can detect the photons generated from the annihilation of the star-captured dark matter into a pair of long-lived particles. When the propagation length of these long-lived particles surpasses the interplanetary distance between the Sun and Jupiter, it becomes unfeasible to detect such dark matter signals originating from the Sun or Jupiter on Earth. Our analysis of the dark matter-induced photons produced by prompt radiation, inverse Compton scattering, and synchrotron radiation mechanisms reveals that a decay length of about 10-3 pc for long-lived particles is required for maximum detectability. We investigate the parameters that allow the long-lived particle's lifetime to be consistent with Big Bang nucleosynthesis while also allowing it to escape the confines of our solar system. The Sirius system is proposed as a promising target for the indirect detection of such long-lived particles. Utilizing the prompt, inverse Compton scattering, and synchrotron radiation, upper limits on the dark matter-proton spin-independent and spin-dependent cross section are estimated with the Fermi-LAT null-signal observation and the capabilities of the upcoming Square Kilometre Array radio telescope.

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“…We have utilized the typical NS of mass 𝑀 = 1.5 𝑀 ⊙ and radius 𝑅 = 10 km. We have considered a region 𝑟 = 0.1 − 10 pc and utilised different DM density profiles tabulated in [1].…”

Section: Dark Matter Capturementioning

confidence: 99%

“…1, the projected limits on the spin-dependent (SD) DM-nucleon scattering cross-section is shown for the mediator decay to neutrinos for different DM density profiles. The projected exclusion plots for spin-independent scattering with all the other decay channels of the mediator are cataloged in [1]. In Fig.…”

Section: Moore Nfwmentioning

confidence: 99%

“…The neutron stars (NS) are the ideal targets to probe the DM scattering with the SM particles due to the high density. In this work, we have studied the capture of DM particles by a population of neutron stars around the galactic center that hosts the densest distribution of DM and stellar population in our galaxy [1]. These captured DM particles can dominantly annihilate through long-lived mediators that can emerge from the stellar interior and decay within the interstellar medium to produce gamma-ray or neutrino signatures [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Neutrinos from dark matter captured in neutron star distribution near the galactic center

Bose¹

2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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Due to abundant dark matter and stellar-rich environments, the galactic center is the optimal location to probe for signatures of captured dark matter annihilation. In this work, we have studied the dark matter capture in the galactic center neutron star distribution and analyzed the neutrinos coming from the annihilation of captured dark matter through long-lived mediators in an idealized gigaton neutrino detector like IceCube/KM3NeT. We report projected limits on the dark matter-nucleon scattering cross-section that are orders of magnitude below the current limits in the TeV-PeV mass scales.

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Neutrinos from captured dark matter annihilation in a galactic population of neutron stars

Cited by 20 publications

References 110 publications

Probing the Dark Matter Capture Rate in a Local Population of Brown Dwarfs with IceCube Gen 2

Probing the Dark Matter Capture Rate in a Local Population of Brown Dwarfs with IceCube Gen 2

Multi-frequency test of dark matter annihilation into long-lived particles in Sirius

Neutrinos from dark matter captured in neutron star distribution near the galactic center

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