Ice Survey by the U. S. Coast Guard work

Carlson, William S.

doi:10.1126/science.168.3929.396

Cited by 4 publications

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“…35 At low energies, this kinetic mixing may be considered as effectively a mixing between the ordinary photon and the dark photon. Two cases have been considered at length in the literature: (i) photon-mirror-photon mixing in the context of mirror matter, where the mirror photon is massless and its couplings to mirror states are identical in form and strength to the coupling of ordinary photons to ordinary charged particles [208,[339][340][341], and (ii) a more generic setup where the dark photon has a mass M D , and phenomenological constraints and detection prospects are analysed in terms the two-dimensional parameter space (ǫ, M D ) (for a recent compilation of bounds, see Ref. [369]).…”

Section: Dark Force Constraintsmentioning

confidence: 99%

“…The most important constraint comes from BBN. If ǫ is too large, then kinetic-mixing-induced processes such as e + e − → e ′+ e ′− , where e ′ is the mirror electron, will bring the mirror sector into thermal equilibrium with the visible sector and spoil BBN [339,341]. The critical parameter is the ratio of the mirror-and visible-sector temperatures, T ′ /T , and one may track the thermal production of mirror particles from the visible-sector bath as a function of ǫ.…”

Section: Dark Force Constraintsmentioning

confidence: 99%

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Review of Asymmetric Dark Matter

Petraki

Volkas

2013

Int. J. Mod. Phys. A

517

523

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Asymmetric dark matter models are based on the hypothesis that the present-day abundance of dark matter has the same origin as the abundance of ordinary or "visible" matter: an asymmetry in the number densities of particles and antiparticles. They are largely motivated by the observed similarity in the mass densities of dark and visible matter, with the former observed to be about five times the latter. This review discusses the construction of asymmetric dark matter models, summarizes cosmological and astrophysical implications and bounds, and touches on direct detection prospects and collider signatures.

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Section: Dark Force Constraintsmentioning

confidence: 99%

Section: Dark Force Constraintsmentioning

confidence: 99%

Review of Asymmetric Dark Matter

Petraki

Volkas

2013

Int. J. Mod. Phys. A

517

523

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Man-Made Climatic Changes

Landsberg

1975

The Changing Global Environment

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Man-Made Climatic Changes

Landsberg

1970

Science

245

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Natural climatic fluctuations, even those of recent years, cover a considerable range. They can be characterized as a "noise" spectrum which masks possible global effects of man-caused increases of atmospheric CO(2) and particulates. Local modifications, either deliberate or inadvertent, measurably affect the microclimate. Some artificial alterations of the microlimate are beneficial in agriculture. Among the unplanned effects, those produced by urbanization on local temperature and on wind field are quite pronounced. The influences on rainfall are still somewhat controversial, but effects may extend considerably beyond the confines of metropolitan areas. They are the result of water vapor released by human activity and of the influence of condensation and freezing nuclei produced in overabundance by motor vehicles and other combustion processes. Therefore it appears that on the local scale man-made influences on climate are substantial but that on the global scale natural forces still prevail. Obviously this should not lead to complacency. The potential for anthropogenic changes of climate on a larger and even a global scale is real. At this stage activation of an adequate worldwide monitoring system to permit early assessment of these changes is urgent. This statement applies particularly to the surveillance of atmospheric composition and radiation balance at sites remote from concentrations of population, which is now entirely inadequate. In my opinion, man-made aerosols, because of their optical properties and possible influences on cloud and precipitation processes, constitute a more acute problem than CO(2). Many of their effects are promptly reversible; hence, one should strive for elimination at the source. Over longer intervals, energy added to the atmosphere by heat rejection and CO(2) absorption remain matters of concern.

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Ice Survey by the U. S. Coast Guard work

Cited by 4 publications

References 0 publications

Review of Asymmetric Dark Matter

Review of Asymmetric Dark Matter

Man-Made Climatic Changes

Man-Made Climatic Changes

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