Dark matter candidates, what chances would you give them?by EL Tags: candidates, chances, dark, matter 

#73
Mar1406, 03:42 AM

Sci Advisor
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#74
Mar1406, 01:10 PM

PF Gold
P: 7,367

Thanks for the clarification on the use of decay products vs aniihilation products. Do you know of a paper that lays out an estimate for the WIMP annihilation rate (perhaps as a percentage of total flux)? I have not been able to find one.




#75
Mar1406, 01:57 PM

Emeritus
Sci Advisor
PF Gold
P: 2,977

Finkbeiner 2004 



#76
Mar1506, 10:54 AM

PF Gold
P: 7,367

Thank you for the link, ST. I have done a little searching to determine detector volumes and found the dimensions of a "drift chamber" that is 26cm radius with a 16cm radis core through which the beam runs, and a chamber length of 2m. The detector has a radial cross section of about 1318cm^{2} and a total volume of 263,600 cm^{3}.
Assuming a flux of 6x10^{4} WIMPs /s/cm2 (from the paper I linked previously) and a longitudinal detector cross/section of 5200cm^{2}, there should be 3.12x10^{8} WIMPS traversing the detector every second. Shouldn't we have seen at least one WIMP annihilation event in all the years particle accelerators/colliders have been in operation? 


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