scholarly journals Two-photon annihilation of singlet cold dark matter due to noncommutative space-time

2012 ◽  
Vol 86 (8) ◽  
Author(s):  
M. M. Ettefaghi
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Space Time ◽  
Noncommutative Space ◽  
Two Photon ◽  
Photon Annihilation

scholarly journals Probing Quantum Gravity Through Strong Gravitational Lensing

2017 ◽  
Author(s):  
Stuart Marongwe
Keyword(s):  
Dark Matter ◽  
Gravitational Field ◽  
Quantum Gravity ◽  
Gravitational Lensing ◽  
Cold Dark Matter ◽  
Space Time ◽  
Radius Of Curvature ◽  
Space Telescope ◽  
Strong Gravitational Lensing ◽  
The Core

We report the use of Einstein rings to reveal the quantized and dynamical states of space-time in a region of impressed gravitational field as predicted by the Nexus Paradigm of quantum gravity. This in turn reveals the orbital speeds of objects found therein and the radius of curvature of the quantized space-time. Similarities between the Nexus graviton and the singular isothermal sphere (SIS) in the Cold Dark Matter (CDM) paradigm are highlighted. However unlike the singular isothermal sphere, the Nexus graviton does not contain singularities or divergent integrals. This solves the core cusp problem. In this work, data from a sample of fifteen Einstein rings published on the Cfa-Arizona Space Telescope Lens Survey (CASTLES) website is used to probe the quantized properties of space-time.

PHOTONS FROM COSMIC PSEUDO NAMBU-GOLDSTONE BOSONS

2001 ◽  
Vol 16 (supp01c) ◽  
pp. 1037-1039
Author(s):  
KIN-WANG NG
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Space Time ◽  
Photon Production ◽  
Goldstone Bosons

We formulate the photon production from coherently oscillating pseudo Nambu-Goldstone bosonic fields in expanding space–time. It is then applied to calculate the photon production from axionic cold dark matter.

scholarly journals Probing Quantum Gravity through Strong Gravitational Lensing

2018 ◽  
Author(s):  
Stuart Marongwe
Keyword(s):  
Dark Matter ◽  
Gravitational Field ◽  
Quantum Gravity ◽  
Gravitational Lensing ◽  
Cold Dark Matter ◽  
Space Time ◽  
Radius Of Curvature ◽  
Space Telescope ◽  
Strong Gravitational Lensing ◽  
The Core

We report the use of Einstein rings to reveal the quantized and dynamical states of space-time in a region of impressed gravitational field as predicted by the Nexus Paradigm of quantum gravity. This in turn reveals the orbital speeds of objects found therein and the radius of curvature of the quantized space-time. Similarities between the Nexus graviton and the singular isothermal sphere (SIS) in the Cold Dark Matter (CDM) paradigm are highlighted. However unlike the singular isothermal sphere, the Nexus graviton does not contain singularities or divergent integrals. This solves the core cusp problem. In this work, data from a sample of fifteen Einstein rings published on the Cfa-Arizona Space Telescope Lens Survey (CASTLES) website is used to probe the quantized properties of space-time.

scholarly journals Two-photon annihilation of Kaluza–Klein dark matter

2005 ◽  
Vol 2005 (04) ◽  
pp. 004-004 ◽  
Author(s):  
Lars Bergström ◽  
Torsten Bringmann ◽  
Martin Eriksson ◽  
Michael Gustafsson
Keyword(s):  
Dark Matter ◽  
Two Photon ◽  
Photon Annihilation ◽  
Kaluza Klein

Singlet scalar dark matter in noncommutative space

2019 ◽  
Vol 19 (2) ◽  
pp. 455-461
Author(s):  
Z Rezaei ◽  
T Alizadeh ◽  
◽  
Keyword(s):  
Dark Matter ◽  
Noncommutative Space

Bolometric Detection of Cold Dark Matter Candidates

1988 ◽  
Author(s):  
A. K. Drukier ◽  
Katherine Freese ◽  
Joshua Frieman
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Bolometric Detection

scholarly journals Detecting Cold Dark Matter Candidates

1987 ◽  
Vol 117 ◽  
pp. 490-490
Author(s):  
A. K. Drukier ◽  
K. Freese ◽  
D. N. Spergel
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Galactic Halo ◽  
Dark Matter Particle ◽  
Low Energy ◽  
The Sun ◽  
Background Rate ◽  
System Noise ◽  
Weakly Interacting ◽  
Massive Neutrinos

We consider the use of superheated superconducting colloids as detectors of weakly interacting galactic halo candidate particles (e.g. photinos, massive neutrinos, and scalar neutrinos). These low temperature detectors are sensitive to the deposition of a few hundreds of eV's. The recoil of a dark matter particle off of a superheated superconducting grain in the detector causes the grain to make a transition to the normal state. Their low energy threshold makes this class of detectors ideal for detecting massive weakly interacting halo particles.We discuss realistic models for the detector and for the galactic halo. We show that the expected count rate (≈103 count/day for scalar and massive neutrinos) exceeds the expected background by several orders of magnitude. For photinos, we expect ≈1 count/day, more than 100 times the predicted background rate. We find that if the detector temperature is maintained at 50 mK and the system noise is reduced below 5 × 10−4 flux quanta, particles with mass as low as 2 GeV can be detected. We show that the earth's motion around the Sun can produce a significant annual modulation in the signal.

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