scholarly journals Search for invisible axion dark matter of mass ma=43  μeV with the QUAX– aγ experiment

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
D. Alesini ◽  
C. Braggio ◽  
G. Carugno ◽  
N. Crescini ◽  
D. D’Agostino ◽  
...  
Keyword(s):  
Dark Matter ◽  
Invisible Axion

scholarly journals Search for Invisible Axion Dark Matter in the 3.3–4.2  μeV Mass Range

2021 ◽  
Vol 127 (26) ◽  
Author(s):  
C. Bartram ◽  
T. Braine ◽  
E. Burns ◽  
R. Cervantes ◽  
N. Crisosto ◽  
...  
Keyword(s):  
Dark Matter ◽  
Mass Range ◽  
Invisible Axion

scholarly journals DARK MATTER AXIONS

2010 ◽  
Vol 25 (02n03) ◽  
pp. 554-563 ◽  
Author(s):  
P. SIKIVIE
Keyword(s):  
Dark Matter ◽  
Particle Physics ◽  
Cold Dark Matter ◽  
Einstein Condensate ◽  
Dark Matter Halos ◽  
Linear Regime ◽  
Bose Einstein Condensate ◽  
Invisible Axion ◽  
Bose Einstein ◽  
The Universe

The hypothesis of an 'invisible' axion was made by Misha Shifman and others, approximately thirty years ago. It has turned out to be an unusually fruitful idea, crossing boundaries between particle physics, astrophysics and cosmology. An axion with mass of order 10-5 eV (with large uncertainties) is one of the leading candidates for the dark matter of the universe. It was found recently that dark matter axions thermalize and form a Bose-Einstein condensate (BEC). Because they form a BEC, axions differ from ordinary cold dark matter (CDM) in the non-linear regime of structure formation and upon entering the horizon. Axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multipoles. Because there is evidence for these phenomena, unexplained with ordinary CDM, an argument can be made that the dark matter is axions.

scholarly journals Extended Search for the Invisible Axion with the Axion Dark Matter Experiment

2020 ◽  
Vol 124 (10) ◽  
Author(s):  
T. Braine ◽  
R. Cervantes ◽  
N. Crisosto ◽  
N. Du ◽  
S. Kimes ◽  
...  
Keyword(s):  
Dark Matter ◽  
Invisible Axion ◽  
The Invisible

scholarly journals A Cosmologist's Tour through the New Particle Zoo (Candy Shop?)

1987 ◽  
Vol 117 ◽  
pp. 445-488
Author(s):  
Michael S. Turner
Keyword(s):  
Dark Matter ◽  
Structure Formation ◽  
Particle Physics ◽  
Elementary Particle Physics ◽  
Recent Developments ◽  
History Of ◽  
Density Inhomogeneities ◽  
Invisible Axion ◽  
Birth Processes ◽  
The Universe

Recent developments in elementary particle physics have led to a renaissance in cosmology, in general, and in the study of structure formation, in particular. Already, the study of the very early (t ≤ 10−2 sec) history of the Universe has provided valuable hints as to the ‘initial data’ for the structure formation problem — the nature and origin of the primeval density inhomogeneities, the quantity and composition of matter in the Universe today, and numerous candidates for the constituents of the ubiquitious dark matter. I review the multitude of WIMP candidates for the dark matter provided by modern particle physics theories, putting them into context by briefly discussing the theories which predict them. I also review their various birth sites and birth processes in the early Universe. At present the most promising candidates seem to be a 30 or so eV neutrino, a few GeV photino, or the ‘invisible axion’ (weighing in at about 10−5 eV!), with a planck mass monopole, quark nuggets, and shadow matter as the leading ‘dark’ horse candidates. I also mention some very exotic possibilities — unstable WIMPs, cosmic strings, and even the possibility of a relic cosmological term.

scholarly journals Search for Invisible Axion Dark Matter with a Multiple-Cell Haloscope

2020 ◽  
Vol 125 (22) ◽  
Author(s):  
Junu Jeong ◽  
SungWoo Youn ◽  
Sungjae Bae ◽  
Jihngeun Kim ◽  
Taehyeon Seong ◽  
...  
Keyword(s):  
Dark Matter ◽  
Multiple Cell ◽  
Invisible Axion

IS NEUTRALINO DARK MATTER POSSIBLE IN THE SUPERSTRING THEORY?

2004 ◽  
Vol 13 (05) ◽  
pp. 819-830 ◽  
Author(s):  
M. D. POLLOCK
Keyword(s):  
Dark Matter ◽  
Big Bang ◽  
Superstring Theory ◽  
Big Bang Nucleosynthesis ◽  
State Formula ◽  
Model Independent ◽  
Age Of The Universe ◽  
Invisible Axion ◽  
High Level ◽  
The Universe

In the heterotic superstring theory, the decay constant of the QCD axion lies within the range 3×1016≲fa GeV ≲1018, the lower limit referring to the model-independent axion, while the upper limit is due to dimension-five, non-renormalizable effects first calculated by Cvetič. Consequently, the neutralino χ0, assumed to be a nearly pure B-ino, decays into the axino ã on the time scale obtained by Covi et al., [Formula: see text], which is ≲10-3 times the age of the Universe t0≈4×1017 s , but can only be made less than the time t≈1 s of the onset of Big-Bang nucleosynthesis by revising mχ0 to an unnaturally high level, mχ0≳500 TeV . Therefore, it is necessary to set the coefficient Ca YY =0, which is possible for the Kim–Shifman–Vainshtein–Zakharov invisible-axion model if the electric charge q c of the heavy-quark colour representation C vanishes. The neutralino does not then decay and can constitute some fraction of the dark matter of the Universe, depending upon the value of mχ0 (for a gaugino-dominated state, [Formula: see text] where [Formula: see text] is the SU(2) singlet slepton). The consequences of an ultra-light axion with fa≈1018 GeV are also discussed.

scholarly journals Search for Invisible Axion Dark Matter with the Axion Dark Matter Experiment

2018 ◽  
Vol 120 (15) ◽  
Author(s):  
N. Du ◽  
N. Force ◽  
R. Khatiwada ◽  
E. Lentz ◽  
R. Ottens ◽  
...  
Keyword(s):  
Dark Matter ◽  
Invisible Axion

scholarly journals μ PROBLEM, SO(10) SUSY GUT AND HEAVY GLUINO LSP

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 849-851
Author(s):  
ARASH MAFI
Keyword(s):  
Dark Matter ◽  
Symmetry Breaking ◽  
Cold Dark Matter ◽  
Goldstone Boson ◽  
Low Energy ◽  
Supersymmetric Particle ◽  
Dark Matter Candidate ◽  
Particle Phenomenology ◽  
Invisible Axion ◽  
Messenger Scale

we present a solution to the μ problem in an SO(10) supersymmetric grand unified (SUSY GUT) model with gauge mediated (GMSB) and D-term supersymmetry breaking. A Peccei-Quinn (PQ) symmetry is broken at the messenger scale and enables the generation of the μ term. The invisible axion (Goldstone boson of PQ symmetry breaking) is a cold dark matter candidate. At low energy, our model leads to a phenomenologically acceptable version of the minimal supersymmetric standard model (MSSM) with novel particle phenomenology. Either the gluino or the gravitino is the lightest supersymmetric particle (LSP). The phenomenological constraints on the model result in a Higgs with mass ~ 86 – 91 GeV and tan β ~ 9 – 14.

First runs with the ORPHEUS dark matter detector

2002 ◽  
Vol 110 (2) ◽  
pp. 106-108
Author(s):  
G Czapek
Keyword(s):  
Dark Matter

Status of dark matter searches in the Boulby Mine

2002 ◽  
Vol 110 (2) ◽  
pp. 91-93
Author(s):  
S Hart
Keyword(s):  
Dark Matter
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