baboons
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baboons [2014/06/09 17:39] cook |
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| In case (1), this effect is important only if the decay channels are relativistic, thus adding a lot of entropy into the universe. In this project, we will consider the injection of neutrons, so we will not consider this effect. | In case (1), this effect is important only if the decay channels are relativistic, thus adding a lot of entropy into the universe. In this project, we will consider the injection of neutrons, so we will not consider this effect. | ||
| + | |||
| + | It is thus the goal of this project to investigate the effect of the injection of non-thermal neutrons on the light element abundances. | ||
| **Key parameters: ** | **Key parameters: ** | ||
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| - The mean life of the decaying particle X -> 2n (some magic decay. Not very physical, probably. But hey, we don't actually know what WIMPS are). | - The mean life of the decaying particle X -> 2n (some magic decay. Not very physical, probably. But hey, we don't actually know what WIMPS are). | ||
| - The energy of these neutrons (although if it is high enough, it may not matter too much?) | - The energy of these neutrons (although if it is high enough, it may not matter too much?) | ||
| - | - The abundance of X. | + | - The abundance of X. Jedamzik, 2004: 7Be is suppressed if O(10^-5) neutrons per proton are injected. Increases D/H. Lifetime of ~1000 s required. |
| - n interaction rates with every other nucleus. | - n interaction rates with every other nucleus. | ||
| + | - Mass of the WIMP. Chosen to be 100 GeV, based on the wikipedia WIMP entry, the font of all wisdom. | ||
| + | This figure: | ||
| + | {{::cdms_parameter_space_2004.png?600|}} | ||
| + | |||
| + | from CDMS in 2004 suggests that this value isn't too far off. | ||
| Reference Papers: | Reference Papers: | ||
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| Kamionkowski 1994. Diffuse Gamma Rays from WIMP Decay and Annihilation [[http://arxiv.org/pdf/astro-ph/9404079v1.pdf]] | Kamionkowski 1994. Diffuse Gamma Rays from WIMP Decay and Annihilation [[http://arxiv.org/pdf/astro-ph/9404079v1.pdf]] | ||
| + | |||
| + | Pierre Salati, 2014. Dark Matter Annihilation in the Universe [[http://arxiv.org/pdf/1403.4495.pdf]] | ||
| **Logbook** | **Logbook** | ||
baboons.txt ยท Last modified: 2014/06/13 10:24 by cook
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