scholarly journals Capture Rate of Weakly Interacting Massive Particles (WIMPs) In Binary Star Systems

2021 ◽  
Author(s):  
Ebrahim Hassani ◽  
Hossein Ebadi ◽  
Reza Pazhouhesh ◽  
Mohammad Hosseinirad
Keyword(s):  
Dark Matter ◽  
Binary Star ◽  
Capture Rate ◽  
Weakly Interacting Massive Particles ◽  
Evolutionary Models ◽  
Companion Star ◽  
Individual Stars ◽  
Massive Particles ◽  
Central Regions ◽  
Elliptical Motion

Abstract The distribution of dark matter (DM) inside galaxies is not uniform. Near the central regions, its density is the highest. Then, it is logical to suppose that, inside galaxies, DM affects the physics of stars in central regions more than outer regions. Besides, current stellar evolutionary models did not consider DM effects in their assumptions. To consider DM effects, at first one must estimate how much DM a star contains. The capture rate (CR) of DM particles by individual stars was investigated already in the literature. In this work, we discuss how CR can be affected when stars are members of binary star systems (BSS) (instead of studying them individually). When a star is a member of a BSS, its speed changes periodically due to the elliptical motion around its companion star. In this work, we investigated CR by BSSs in different BSS configurations. In the end, we discussed observational signatures that can be attributed to the DM effects in BSSs.

scholarly journals WEAKLY-INTERACTING MASSIVE PARTICLES IN TORSIONALLY-GRAVITATING DIRAC THEORY

2013 ◽  
Vol 22 (10) ◽  
pp. 1350071 ◽  
Author(s):  
LUCA FABBRI
Keyword(s):  
Dark Matter ◽  
Weakly Interacting Massive Particles ◽  
Dirac Theory ◽  
Dirac Fields ◽  
Weakly Interacting ◽  
Massive Particles ◽  
Matter Fields ◽  
Dirac Matter

We shall consider the problem of Dark Matter (DM) in torsion gravity with Dirac matter fields; we will consider the fact that if Weakly-Interacting Massive Particles in a bath are allowed to form condensates then torsional effects may be relevant even at galactic scales: we show that torsionally-gravitating Dirac fields have interesting properties for the problem of DM. We discuss consequences.

scholarly journals Hadronic and Hadron-Like Physics of Dark Matter

Symmetry ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 587 ◽  
Author(s):  
Vitaly Beylin ◽  
Maxim Yu. Khlopov ◽  
Vladimir Kuksa ◽  
Nikolay Volchanskiy
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Weakly Interacting Massive Particles ◽  
Elementary Particles ◽  
Physical Basis ◽  
Beyond The Standard Model ◽  
Dark Matter Search ◽  
Weakly Interacting ◽  
The Standard Model ◽  
Massive Particles

The problems of simple elementary weakly interacting massive particles (WIMPs) appeal to extend the physical basis for nonbaryonic dark matter. Such extension involves more sophisticated dark matter candidates from physics beyond the Standard Model (BSM) of elementary particles. We discuss several models of dark matter, predicting new colored, hyper-colored or techni-colored particles and their accelerator and non-accelerator probes. The nontrivial properties of the proposed dark matter candidates can shed new light on the dark matter physics. They provide interesting solutions for the puzzles of direct and indirect dark matter search.

SEARCHES FOR DARK MATTER PARTICLES THROUGH COSMIC RAY MEASUREMENTS

2002 ◽  
Vol 17 (12n13) ◽  
pp. 1777-1786 ◽  
Author(s):  
PIERO ULLIO
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
Cosmic Ray ◽  
Weakly Interacting Massive Particles ◽  
Weakly Interacting ◽  
Pair Annihilation ◽  
Massive Particles

We consider the hypothesis that dark matter is made of weakly interacting massive particles (WIMPs) and describe how their pair annihilation in the galactic halo generates exotic cosmic ray fluxes. Features for generic WIMP models are reviewed, pointing out cases in which clear signatures arise. Implications from available and upcoming measurements are discussed.

Recent status and prospect of CDEX and CJPL

2015 ◽  
Vol 30 (28n29) ◽  
pp. 1545007 ◽  
Author(s):  
S. K. Liu ◽  
Q. Yue
Keyword(s):  
Dark Matter ◽  
Point Contact ◽  
Germanium Detector ◽  
Liquid Argon ◽  
Weakly Interacting Massive Particles ◽  
Underground Laboratory ◽  
Detector Arrays ◽  
Weakly Interacting ◽  
Massive Particles

The China Dark Matter Experiment (CDEX) aims at the direct searches of light Weakly Interacting Massive Particles (WIMPs) deploying point-contact germanium detector at the China Jinping Underground Laboratory (CJPL), which has about 2400 m of rock overburdened. Results on light WIMPs from the prototype CDEX-0 with a few gram mass and CDEX-1 with a 994 g mass are reported. The CDEX-10 experiment employed a germanium detector arrays and liquid argon anti-Compton is being constructed and tested. The multi-purpose experiment CDEX-1T and the expansion project of CJPL-II will also be discussed.

TOWARDS DETECTION OF LOW MASS WIMPs (MWIMP<10GeV/c2): MINI-REVIEW

2013 ◽  
Vol 28 (26) ◽  
pp. 1330033 ◽  
Author(s):  
A. K. DRUKIER ◽  
S. NUSSINOV
Keyword(s):  
Dark Matter ◽  
Weakly Interacting Massive Particles ◽  
Dark Matter Candidate ◽  
Weakly Interacting ◽  
Reliable Detection ◽  
Massive Particles ◽  
Low Mass ◽  
Nuclear Targets ◽  
The Universe

Weakly Interacting Massive Particles (WIMPs) may constitute most of the matter in the Universe. There are intriguing results from DAMA/LIBRA, CoGeNT and CRESST-II, and more recently CDMS-Si suggesting a relatively light dark matter candidate of mass <10 GeV /c2. At the same time, experiments using heavy nuclear targets such as CDMS-Ge and XENON detectors suggest that there is no DM candidates with MW>15 GeV /c2. We review the existing experiments and the problems associated with light mass WIMP detection. We find that all six experiments considered (DAMA, CoGeNT, CRESST, CDMS-Si, CDMS-Ge, XENON) are consistent if one assumes that the mass of WIMP is lower than expected: 3.4<MW<6.8 GeV /c2. This is followed by a discussion of the properties of "new" detectors, which may enable more reliable detection of low mass WIMPs.

scholarly journals Indirect searches for dark matter with the Fermi LAT instrument

2014 ◽  
Vol 29 (22) ◽  
pp. 1430030 ◽  
Author(s):  
M. N. Mazziotta ◽  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
Weakly Interacting Massive Particles ◽  
Current Status ◽  
Large Area ◽  
Weakly Interacting ◽  
Electron Positron ◽  
Massive Particles ◽  
Particle Dark Matter

In this review the current status of several searches for particle dark matter with the Fermi Large Area Telescope instrument is presented. In particular, the current limits on the weakly interacting massive particles, obtained from the analyses of gamma-ray and cosmic ray electron/positron data, will be illustrated.

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