Welcome Guardians, I have come to the forums today to inform you that because of all your heroic services to the Traveler and the Light it has permitted that each Guardian may ask a single question of it, or it's Speaker, the voice of the Traveler.
May the Light be with you Guardians...
“It is known as the Traveler, guardian of all that exists. The roots of the galaxy have grown deep under it's careful tending. Where there is life, the wisdom of it's unparalleled intelligence has saturated the soil. It's strength is a luminous sun towards which all life blossoms and the impervious shelter beneath which it has prospered.” - The Speaker, regarding the Traveler
Edit: Over 150 responses? The Traveler is most pleased with its followers...
Edit: 300 Spartans? Nah more like 300 curious Guardians!
THE SPEAKER HAS RETIRED.
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1 ReplyDid you buy that exotic weed from Xür?
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3 RepliesAre u part of the KKK with dem white robes?
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4 RepliesI hear that you're really just three monkeys standing on each others' shoulders. Is this true?
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1 ReplyWhy do you hardly have anything useful to say?
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5 RepliesThe universe seems to be filled with a mysterious substance called Dark Matter, which appears to interact gravitationally, with a density of about 0.3 GeV/cm3. Since we cannot see the dark matter, it cannot have electric charge. On the other hand, it must have some non-grav- itational interactions to match our models of early universe cosmology. The leading candidates for what dark matter might be are Weakly Interacting Massive Particles, or WIMPs. For example, in supersymmetry, a natural WIMP appears as the Bino, which is the Fermionic superpartner of the Z-boson. 1. Direct Detection One way to look for WIMPs is though their weak interactions with matter. For example, the LUX experiment (which Professor Morii works on), looks for WIMP scat- tering off of Xenon nuclei. Call the WIMP ψ (a Fermion) and the Xenon φ (a scalar). Then a appropriate Lagrangian describing some of the interactions of ψ, φ and the Z boson is L = − 1 ( F Z ) 2 + m 2 Z 2 − 1 φ ( ﰀ + m 2 ) φ + ψ ̄ ( i ∂ + M ) ψ ( 1 ) 4μν Zμ2 +igZμψ ̄γμψ+iNgZμ[φ⋆∂μφ−φ∂μφ⋆] (2) Note the factor of N = 131 (Xenon’s atomic mass number) which results from the Z interacting with all of the nucleons in Xe coherently. LUX looks for the scatting process ψφ → ψφ by measuring the recoil energy of the φ. a) Draw the relevant Feynman diagram(s) for ψφ → ψφ. Calculate |M|2 for this process, averaging over initial spins and summing over final spins. b) Calculate the total cross section for a WIMP of energy E and mass M to scatter off a Xenon nucleus, in the rest frame of the Xenon. c) WIMPs are expected to be highly energetic, with an average velocity in our neck of the galaxy of 230km . How much Xenon would you need to see 10 scattering events in 1 year for a WIMP mass of 100 GeV? You can take g = 0.3 and mZ = 90 GeV.
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4 RepliesWhat is the average speed of a swallow ?
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1 ReplyDo u wank
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2 RepliesCan you tell me of the great battle?
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1 ReplyWhy do you dress like Bruce Jenner?
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9 RepliesWhat is behind that, mask of yours? A Hive face?
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kneel before me
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kneel before me
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kneel before me
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kneel before me