scholarly journals Dark matter self-interactions from spin-2 mediators

2021 ◽  
Vol 81 (10) ◽  
Author(s):  
Yoo-Jin Kang ◽  
Hyun Min Lee

AbstractWe propose a new mechanism for rendering dark matter self-interacting in the presence of a massive spin-2 mediator. The derived Yukawa-type potential for dark matter is independent of the spins of dark matter in the leading order of the momentum expansion, so are the resulting non-perturbative effects for the dark matter self-scattering. We find that both the Born cross section and relatively mild resonance effects assist to make the self-scattering cross section velocity-dependent. We discuss how to evade the current indirect bounds on dark matter annihilations and show that the model is marginally compatible with perturbative unitarity in the ghost-free realization of the massive spin-2 particle.

2010 ◽  
Vol 25 (18n19) ◽  
pp. 3741-3747
Author(s):  
ABHIJIT BANDYOPADHYAY ◽  
SOVAN CHAKRABORTY ◽  
DEBASISH MAJUMDAR

We consider the recent limits on dark matter–nucleon elastic scattering cross-section from the analysis of CDMS II collaboration using the two signal events observed in CDMS experiment. With these limits we try to interpret the super-Kamiokande (SK) bounds on the detection rates of up-going muons induced by the neutrinos that are produced in the sun from the decay of annihilation products of dark matter (WIMP's) captured in the solar core. Calculated rates of up-going muons for different annihilation channels at SK using CDMS bounds are found to be orders below the predicted upper limits of such up-going muon rates at SK. Thus there exists room for enhancement (boost) of the calculated rates using CDMS limits for interpreting SK bounds. Such a feature is expected to represent the PAMELA data with the current CDMS limits. We also show the dependence of such a possible enhancement factor (boost) on WIMP mass for different WIMP annihilation channels.


2005 ◽  
Vol 20 (05) ◽  
pp. 313-318
Author(s):  
B. BLOK

We calculate the total scattering cross-section of a dynamical quantum electrically neutral dipole in QED of the infinitely heavy charge and of the infinitely heavy dipole in the leading order in α em .


2021 ◽  
Vol 813 ◽  
pp. 136056
Author(s):  
Nodoka Yamanaka ◽  
Hideaki Iida ◽  
Atsushi Nakamura ◽  
Masayuki Wakayama

1992 ◽  
Vol 01 (01) ◽  
pp. 1-37 ◽  
Author(s):  
J. ENGEL ◽  
S. PITTEL ◽  
P. VOGEL

We describe the elastic scattering of weakly interacting dark matter particles from nuclei, with laboratory detection in mind. We focus on the lightest neutralino (a neutral fermion predicted by supersymmetry) as a likely candidate and discuss the physics needed to calculate its elastic scattering cross section and interpret experimental results. Particular emphasis is placed on a proper description of the structure of the proposed detector nuclei. We include a brief discussion of expected count rates in some detectors.


2011 ◽  
Vol 20 (08) ◽  
pp. 1373-1382
Author(s):  
GENEVIEVE BÉLANGER

The neutralino in a singlet extension of the minimal supersymmetric standard model and the mixed sneutrino in a supersymmetric model with right-handed neutrinos are two possible light dark matter candidates. Both can have a large scattering cross section on nuclei thus being compatible with recent results in direct detection experiments. A brief overview of the properties of light supersymmetric dark matter scenarios is presented.


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