Dark Matter

The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter

New paper came out which is extremely compelling. They are observing a 1 GeV gamma ray signal out of the plane of the Milky Way… from no specific source. This is troubling and needs to be resolved by looking at some of the dimmer galaxies – which have been rotating too fast for their matter. I’m not sure I understand how there could be a spherical expanse of dark matter, but it does match some equations. More importantly, excess 1 GeV signal does NOT match the products of annihilation for a 31 GeV particle. There should be a tail of reactions which go all the way up to 62 GeV. No sign of that has been seen.

Alien x

Ok, so we should be able to detect dark matter Annihilaaargh  (Ben 10 joke) annihilations in our solar system. But not everything has to exist, just because its on some super-hero’s costume.

Does Dark Matter Exist?
+1) it is necessary for gravity to work at Galaxy scale    -1) So our equations/understanding of Gravity is wrong.
+2) It might be one of the cool super symmetry particles. -2) yeah, I love string theory – but I don’t believe it.
+3) It explains a high GeV gamma signal    -3) The universe is a weird place, I can’t explain everything.

Other concepts?
Actually, since Hawking’s Radiation may have been removed, micro black holes may be a more serious candidate again. Interactions between Micro black holes are probably similar to dark matter…and the 1 GeV signature is much more believable. Of course, they are my favorite hammer … so this is a job for Nail!

So, I personally discount my theory. Frankly, I’d prefer String Theory to pull out a win here. Finding WIMPS would do wonders for multi-dimensional theory. The anihilation would be perpendicular to our 3-space, so we only get 1 GeV of leakage in a 60 GeV reaction. There are some particles “created” which cease to exist a nano-second later, each with a convenient shower of lower-energy x-rays, electrons, protons, photons. The “clean” signature we’d expect from an electron/anti-electron event 0.51 MeV assumes all dimensions of an electron exist in this universe. (String Theory is the bomb, but creates all kinds of misery for those who claim to understand its math.)

I wish them luck – and thank God that I’m an engineer who gets to point and laugh at their misfortune. (Up till the time they actually build a Brane Engine and I’m required to operate it in a safe manner and not destroy the multiverse.) yeah, the Risk report is gonna take a while on THAT one.

Ya’ll have a good weekend.

One thought on “Dark Matter”

  1. Interesting rumours, idneed, and I am confidentthe Higgs will be found in the range 122-132 GeV, havingpredicted its mass together with the top quark massin a composite model, before either top or Higgs weredetected. But I’ld point out there were similar rumoursof an excess in the b anti-b channel indicating a Higgsin the range of 130-140 GeV just a couple of months back(personal communication from W. Marciano). It was a similardeal, a couple of sigma each in CMS and Atlas, which addedto a bit more than 3 sigma. It went away of course.My last look at the 2 gamma data, with abouthalf of the total data set analysed showed points aboveand below the theoretical continuum, and nosign of a bump whatever. The SM Higgs width at thismass is so small that I don’t even remember the numberbut I believe it’s on the order of 1 MeV. So in this casethe width of any bump in the 2 gamma mass spectrumwill be determined by detector resolution, on the orderof 5 GeV. There was an extra factor of two availablein the integrated flux not analysed at that time, butthat only gives 40% better resolution of any bumpat 125GeV. So I can’t believe this will be conclusive.A SM Higgs this light just escapes the vacuumstability and metastibility (due to finite temperatureeffects in the early universe) if new physics onlyappears near the Planck scale. So it’s premature for Kane and the supersymmetriciansto be rejoicing, I think. They should rather be worryingabout the absence of supersymmetry at 95% confidencelevel, below about 1 TeV. Exciting times! about 50%

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