Explanation of the 511 keV line: cascade annihilating dark matter with the 
                
                  
                
                $$^8$$
                
                  
                    
                      
                      8
                    
                  
                
              Be anomaly

Jia, Lingpu

doi:10.1140/epjc/s10052-018-5555-0

Cited by 9 publications

(6 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The need for a positron injection energy smaller than 3 MeV [8] implies that, unless one relies on cascade annihilations [9], M DM 3 MeV. Since so small values of M DM have been found to be in conflict with cosmological observations, a simple DM-annihilation origin of the 511 keV line has been claimed excluded in [10].…”

Section: The 511 Line and Dark Matter: Preliminariesmentioning

confidence: 99%

Dark matter models for the 511 keV galactic line predict keV electron recoils on Earth

Ema¹,

Sala²,

Sato³

2021

Eur. Phys. J. C

View full text Add to dashboard Cite

We propose models of Dark Matter that account for the 511 keV photon emission from the Galactic Centre, compatibly with experimental constraints and theoretical consistency, and where the relic abundance is achieved via p-wave annihilations or, in inelastic models, via co-annihilations. Due to the Dark Matter component that is inevitably upscattered by the Sun, these models generically predict keV electron recoils at detectors on Earth, and could naturally explain the excess recently reported by the XENON1T collaboration. The very small number of free parameters make these ideas testable by detectors like XENONnT and Panda-X, by accelerators like NA64 and LDMX, and by cosmological surveys like the Simons observatory and CMB-S4. As a byproduct of our study, we recast NA64 limits on invisibly decaying dark photons to other particles.

show abstract

Section: The 511 Line and Dark Matter: Preliminariesmentioning

confidence: 99%

Dark matter models for the 511 keV galactic line predict keV electron recoils on Earth

Ema¹,

Sala²,

Sato³

2021

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…While DM is less likely to be mainly composed of astrophysical objects [24][25][26][27][28][29][30][31][32][33][34], there are no particle physics candidates in the standard model (SM), and many models beyond it are under investigation [1,3,4,. The "weakly interacting massive particles miracle" [41,[86][87][88][89][90][91][92][93][94], i.e., the suggestive coincidence of the weak coupling and the DM density that would have thermally been generated with the latter as the interaction between ordinary matter and DM, motivated us to experimentally test their direct scattering [95][96][97][98][99][100][101][102][103][104][105][106][107][108][109], the DM decay to visible cosmic rays , and DM productions at collider experiments [98,, but no positive results have been reported so far.…”

Section: Introductionmentioning

confidence: 99%

Glueball scattering cross section in lattice SU(2) Yang-Mills theory

et al. 2020

View full text Add to dashboard Cite

We calculate the scattering cross section between two 0 þþ glueballs in SUð2Þ Yang-Mills theory on a lattice at β ¼ 2.1, 2.2, 2.3, 2.4, and 2.5 using the indirect (HAL QCD) method. We employ the clusterdecomposition error reduction technique and use all space-time symmetries to improve the signal. In the use of the HAL QCD method, the centrifugal force was subtracted to remove the systematic effect due to the nonzero angular momenta of lattice discretization. From the extracted interglueball potential, we determine the low energy glueball effective theory by matching with the one-glueball exchange process. We then calculate the scattering phase shift and derive the relation between the interglueball cross section and the scale parameter Λ as σ ϕϕ ¼ ð2-51ÞΛ −2 (stat þ sys). From the observational constraints of galactic collisions, we obtain the lower bound of the scale parameter as Λ > 60 MeV. We also discuss the naturalness of the Yang-Mills theory as the theory explaining dark matter.

show abstract

“…In fact there are many approaches to explain the anomaly by the new physics models; e.g. local B −L model [8][9][10], local Baryon number model [9], extra U(1) gauge symmetry models [11][12][13][14][15], discussion associated with dark matter [16][17][18], and flavour physics etc. [19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Explaining Atomki anomaly and muon g − 2 in U(1)X extended flavour violating two Higgs doublet model

Nomura¹,

Sanyal

2021

J. High Energ. Phys.

View full text Add to dashboard Cite

We investigate a two Higgs doublet model with extra flavour depending U(1)X gauge symmetry where Z′ boson interactions can explain the Atomki anomaly by choosing appropriate charge assignment for the SM fermions. For parameter region explaining the Atomki anomaly we obtain light scalar boson with $$ \mathcal{O} $$ O (10) GeV mass, and we explore scalar sector to search for allowed parameter space. We then discuss anomalous magnetic dipole moment of muon and lepton flavour violating processes induced by Yukawa couplings of our model.

show abstract

Explanation of the 511 keV line: cascade annihilating dark matter with the $$^8$$ 8 Be anomaly

Cited by 9 publications

References 75 publications

Dark matter models for the 511 keV galactic line predict keV electron recoils on Earth

Dark matter models for the 511 keV galactic line predict keV electron recoils on Earth

Glueball scattering cross section in lattice SU(2) Yang-Mills theory

Explaining Atomki anomaly and muon g − 2 in U(1)X extended flavour violating two Higgs doublet model

Contact Info

Product

Resources

About