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-ray Constraints on Decaying Dark Matter and Implications for IceCube

Cohen, Timothy; Murase, Kohta; Rodd, Nicholas L.; Safdi, Benjamin R.; Soreq, Yotam

doi:10.1103/physrevlett.119.021102

Cited by 165 publications

(217 citation statements)

References 144 publications

(202 reference statements)

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“…Nevertheless, in these models the DM decays will generically also produce photons which can be searched for in other experiments. In particular [7] considered the limits obtained with the Fermi -LAT, and demonstrated that models which seek to explain the majority of the IceCube flux appear to be in tension with the gamma-ray data. HAWC, with its ability to study gamma-rays at even higher energy than the Fermi -LAT, can also constrain this parameter space, as we demonstrate in this work.…”

Section: Jcap02(2018)049mentioning

confidence: 99%

“…[20] and in particular [21] for a recent summary, the presence of a large contribution from DM cannot at present be excluded using the IceCube data alone. Accordingly, a number of models have been developed which explain the high-energy neutrino flux with DM [7,. Generally these models seek to explain the highest energy neutrinos observed by IceCube -the so-called High Energy Starting Events (HESE)-however some also deal with a putative excess in the lower energy Medium Energy Starting Events (MESE) [45], which has been discussed in the context of DM [46] and astrophysics [47][48][49].…”

Section: Jcap02(2018)049mentioning

confidence: 99%

“…spectrum with a mass at the scale of confinement, which can be well above the electroweak scale [1][2][3][4][5][6][7].…”

Section: Jcap02(2018)049mentioning

confidence: 99%

“…[7]. We follow the prescription in that reference for the various contributions, using the PYTHIA 8.219 software [62][63][64] with electroweak corrections enabled [65].…”

Section: Dark Matter Spectramentioning

confidence: 99%

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A search for dark matter in the Galactic halo with HAWC

Abeysekara

Albert

Alfaro

et al. 2018

J. Cosmol. Astropart. Phys.

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Abstract. The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field-of-view observatory sensitive to 500 GeV -100 TeV gamma rays and cosmic rays. With its observations over 2/3 of the sky every day, the HAWC observatory is sensitive to a wide variety of astrophysical sources, including possible gamma rays from dark matter. Dark matter annihilation and decay in the Milky Way Galaxy should produce gamma-ray signals across many degrees on the sky. The HAWC instantaneous field-of-view of 2 sr enables observations of extended regions on the sky, such as those from dark matter in the Galactic halo. Here we show limits on the dark matter annihilation cross-section and decay lifetime from HAWC observations of the Galactic halo with 15 months of data. These are some of the most robust limits on TeV and PeV dark matter, largely insensitive to the dark matter morphology. These limits begin to constrain models in which PeV IceCube neutrinos are explained by dark matter which primarily decays into hadrons.

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Section: Jcap02(2018)049mentioning

confidence: 99%

Section: Jcap02(2018)049mentioning

confidence: 99%

“…spectrum with a mass at the scale of confinement, which can be well above the electroweak scale [1][2][3][4][5][6][7].…”

Section: Jcap02(2018)049mentioning

confidence: 99%

“…[7]. We follow the prescription in that reference for the various contributions, using the PYTHIA 8.219 software [62][63][64] with electroweak corrections enabled [65].…”

Section: Dark Matter Spectramentioning

confidence: 99%

See 2 more Smart Citations

A search for dark matter in the Galactic halo with HAWC

Abeysekara

Albert

Alfaro

et al. 2018

J. Cosmol. Astropart. Phys.

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“…For energies of the order of the electroweak scale, we applied the limit from the Fermi satellite observation of the galactic halo [42], and the extragalactic flux [43] (see also Ref. [44] for a recent combined analysis 10 ). We present our results in Fig.…”

Section: B Icecube Constraintsmentioning

confidence: 99%

Gravitino decay in high scale supersymmetry with R -parity violation

et al. 2018

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We consider the effects of R-parity violation due to the inclusion of a bilinear μ 0 LH u superpotential term in high-scale supersymmetric models with an EeV scale gravitino as dark matter. Although the typical phenomenological limits on this coupling (e.g., due to lepton number violation and the preservation of the baryon asymmetry) are relaxed when the supersymmetric mass spectrum is assumed to be heavy (in excess of the inflationary scale of 3 × 10 13 GeV), the requirement that the gravitino be sufficiently long lived so as to account for the observed dark matter density, leads to a relatively strong bound on μ 0 ≲ 20 GeV. The dominant decay channels for the longitudinal component of the gravitino are Zν, W AE l ∓ , and hν. To avoid an excess neutrino signal in IceCube, our limit on μ 0 is then strengthened to μ 0 ≲ 50 keV. When the bound is saturated, we find that there is a potentially detectable flux of monochromatic neutrinos with EeV energies.

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A portalino to the dark sector

Schmaltz

Weiner

2019

J. High Energ. Phys.

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Portal" models that connect the Standard Model to a Dark Sector allow for a wide variety of scenarios beyond the simplest WIMP models. Kinetic mixing of gauge fields in particular has allowed a broad range of new ideas. However, the models that evade CMB constraints are often non-generic, with new mass scales and operators to split states and suppress indirect detection signals. Models with a "portalino", a neutral fermion that marries a linear combination of a standard model neutrino and dark sector fermion and carries a conserved quantum number, can be simpler. This is especially interesting for interacting dark sectors; then the unmarried linear combination which we identify as the standard model neutrino inherits these interactions too, and provides a new, effective interaction between the dark sector and the standard model. These interactions can be simple Z type interactions or lepton-flavor changing. Dark matter freezes out into neutrinos, thereby evading CMB constraints, and conventional direct detection signals are largely absent. The model offers different signals, however. The "portalino" mechanism itself predicts small corrections to the standard model neutrino couplings as well as the possibility of discovering the portalino particle in collider experiments. Possible cosmological and astroparticle signatures include monochromatic neutrino signals from annihilation, spectral features in high energy CR neutrinos as well as conventional signals of additional light species and dark matter interactions. * Electronic address: schmaltz@bu.edu † Electronic address: neal.weiner@nyu.edu 1 arXiv:1709.09164v2 [hep-ph] 4 Dec 2018 I. SEARCHING FOR HIDDEN SECTORSA major question for particle physics is whether there is detectable physics beyond the standard model (BSM). We are well aware that there is physics beyond the standard model, as evidenced by dark matter, neutrino mass, gravity, and inflation. There are naturalness arguments in favor of additional BSM physics, such as the hierarchy problem and the strong CP problem. Since these connect to properties of known fields in the standard model, they often motivate interesting signals or new experiments.As the LHC energy has marched up and the luminosity increased, we have gained the ability to look for new particles at ever higher masses. Constraints on new particles with O(0.1) level couplings are strong, with tremendous limits over wide ranges of lifetimes and properties. Simultaneously, attention has increasingly turned toward searches for new hidden sectors.Much of the attention has come on "dark sector" models, where there can be new particles and interactions present, but which are generally assumed to be SM singlets. The communication between sectors occurs via "portals," which are operators that connect the two sectors, i.e.,Where the dimension of the operator is 4 + p and Λ is the relevant scale of the operator.While non-renormalizable portals can be important, (see, e.g., [1]), much effort has been focused on the renormalizable and super-renormalizable ...

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γ -ray Constraints on Decaying Dark Matter and Implications for IceCube

Cited by 165 publications

References 144 publications

A search for dark matter in the Galactic halo with HAWC

A search for dark matter in the Galactic halo with HAWC

Gravitino decay in high scale supersymmetry with R -parity violation

A portalino to the dark sector

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