Revisiting simplified dark matter models in terms of AMS-02 and Fermi-LAT

Li, Tong

doi:10.1007/jhep01(2018)151

Cited by 7 publications

(7 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This signal, if confirmed, is compatible with a DM interpretation of the Galactic center γ-ray excess (GCE) for a variety of annihilation channels. It is also expected to provide a detectable signal in antideuterons [22], and it is compatible with a variety of different beyond-the-standard-model scenarios [21,[23][24][25][26][27][28][29]. However, given the small experimental errors, several important sources of systematic uncertainties, which before could be neglected, now become increasingly important and need to be further investigated.…”

Section: Introductionmentioning

confidence: 96%

Scrutinizing the evidence for dark matter in cosmic-ray antiprotons

et al. 2019

View full text Add to dashboard Cite

Global fits of primary and secondary cosmic-ray (CR) fluxes measured by AMS-02 have great potential to study CR propagation models and search for exotic sources of antimatter such as annihilating dark matter (DM). Previous studies of AMS-02 antiprotons revealed a possible hint for a DM signal which, however, could be affected by systematic uncertainties. To test the robustness of such a DM signal, in this work we systematically study two important sources of uncertainties: the antiproton production cross sections needed to calculate the source spectra of secondary antiprotons and the potential correlations in the experimental data, so far not provided by the AMS-02 Collaboration. To investigate the impact of cross-section uncertainties we perform global fits of CR spectra including a covariance matrix determined from nuclear cross-section measurements. As an alternative approach, we perform a joint fit to both the CR and cross-section data. The two methods agree and show that cross-section uncertainties have a small effect on the CR fits and on the significance of a potential DM signal, which we find to be at the level of 3σ. Correlations in the data can have a much larger impact. To illustrate this effect, we determine possible benchmark models for the correlations in a data-driven method. The inclusion of correlations strongly improves the constraints on the propagation model and, furthermore, enhances the significance of the DM signal up to above 5σ. Our analysis demonstrates the importance of providing the covariance of the experimental data, which is needed to fully exploit their potential.

show abstract

Section: Introductionmentioning

confidence: 96%

Scrutinizing the evidence for dark matter in cosmic-ray antiprotons

et al. 2019

View full text Add to dashboard Cite

show abstract

“…We note that both AMS-02 anomalies have been widely studied, either as constraints on DM models or as potential signatures thereof [23][24][25][26][27][28][29]. The anti-proton case has been argued to be highly significant and most in agreement with the annihilation via b-quarks of a 40 − 70 GeV WIMP with some potential for heavier masses [23].…”

Section: Methodsmentioning

confidence: 83%

“…We ensure that measured spectra of the AMS-02 anti-proton results [22] and other constraints are not exceeded. These particular astrophysical data sets are of interest as they have been extensively studied as potential signatures of DM [23][24][25][26][27][28][29][30][31]. This DM model is then used to make predictions for radio observations with the MeerKAT precursor to the Square Kilometre Array (SKA).…”

Section: Introductionmentioning

confidence: 99%

Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA

Beck¹,

Temo²,

Elias³

et al. 2021

Preprint

View full text Add to dashboard Cite

Multi-lepton anomalies at the Large Hadron Collider are reasonably well described by a two Higgs doublet model with an additional singlet scalar. Here, we demonstrate that using this model we are also able to describe the excesses in gamma-ray flux from the galactic centre and the cosmic-ray spectra from AMS-02. This is achieved through Dark Matter (DM) annihilation via the singlet scalar. Of great interest is the flux of synchrotron emissions which results from annihilation of DM in Milky-Way satellites. We make predictions for MeerKAT observations of the nearby dwarf galaxy Reticulum II and we demonstrate the power of this instrument as a new frontier in indirect dark matter searches.

show abstract

“…The green region gives cross sections below the neutrino floor. suppressed [35,36]. Above the black contours in Fig.…”

Section: Resultsmentioning

confidence: 94%

“…Assuming that DM particles have frozen out in the early Universe, as standard thermal relics, they acquire their present abundance through annihilation processes. The pairs of DM particle χ in the simplified models can either annihilate into SM quark or gluon pairs via s-channel processes χχ → a → q q, gg or annihilate into two mediators χχ → aa when kinematically allowed [32][33][34][35][36]. The amplitudes of the two annihilation channels are governed by g χ g q and g 2 χ , respectively.…”

Section: Other Dark Matter Constraintsmentioning

confidence: 99%

Simplified dark matter models with loop effects in direct detection and the constraints from indirect detection and collider search *

2019

Chinese Phys. C

Self Cite

View full text Add to dashboard Cite

We reexamine the simplified dark matter (DM) models with fermionic DM particle and spin-0 mediator. The DM-nucleon scattering cross sections of these models are low-momentum suppressed at treelevel, but receive sizable loop-induced spin-independent contribution. We perform one-loop calculation for scalar-type and twist-2 DM-quark operators and complete two-loop calculation for scalar-type DM-gluon operator. By analyzing the loop-level contribution from new operators, we find that future direct detection experiments can be sensitive to a fraction of parameter space. The indirect detection and collider search also provide complementary constraints on these models. *

show abstract

Revisiting simplified dark matter models in terms of AMS-02 and Fermi-LAT

Cited by 7 publications

References 72 publications

Scrutinizing the evidence for dark matter in cosmic-ray antiprotons

Scrutinizing the evidence for dark matter in cosmic-ray antiprotons

Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA

Simplified dark matter models with loop effects in direct detection and the constraints from indirect detection and collider search *

Contact Info

Product

Resources

About