WIMP weakly interacting massive

Another important classification of particle dark matter rests upon its production mechanism. Particles that were in thermal equilibrium in the early Universe, like neutrinos, neutralinos, and most other WIMPs (weakly interacting massive particles), are called thermal relics. Particles which were produced by a non-thermal mechanism and that never had the chance of reaching thermal equilibrium in the early Universe are called non-thermal relics. There are several examples of non-thermal relics axions emitted by cosmic strings, solitons produced in phase transitions, WIMPZILLAs produced gravitationally at the end of inflation, etc. 

And, the name that eventually led all the rest, supersymmetric (and other symmetries) partners of the particles you know and love, put in initial order by Lee and Weinberg (47). The particles have been called inos (as in gravitino), spartners (as in sneutrinos), and WIMPs (weakly interacting massive particles). 

There is one point where it may be worthwhile to keeping an eye open for the alchemistic style of nuclear reactions catalyzed by trace quantities of WIMP (weakly interacting massive particles) such as a negatively charged X with an atomic weight [52-54] somewhere between 100 and 10. Our major chance of observing such species in stars is the isotopic shift factor of all wave-numbers... 

The fabrication of ionization bolometers used at very low temperatures ( 60 mK) for the detection of weakly interacting massive particles (WIMPs) from outside of the solar system requires intrinsic silicon or germanium material. 

Below 1.2 K, the cryostats using natural He are replaced by 3He/4He dilution refrigerators. Such refrigerators are commonly used to cool the bolometer/radiation detectors in the mK range (typically 30-60mK range). They are used, for instance, in the detection of the weakly interacting massive particles (WIMP). They have only been used in a limited number of cases for optical studies of impurities in semiconductors [36]. 

Qs + Qa = 1> with Qs being the nonbaryonic contribution (Steigman et al. 2000). At the time of writing, it is not clear yet what constitutes the nonbaryonic mass. A quite general name for possible new, exotic particles is WIMP, an acronym for weakly interacting massive particle (see Sects. 12.2.1.3 and 12.2.1.4 for details). 

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