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How do particles annihilate?e+e-LEP collider:e+e- annihilation~~qqphoton annihilationγγ~~~~eeeIn CM: Eq=Eemonoenergetic quarksfrom monoenergetic leptonsQuarks fragment into jets,mostly light mesons:π+,π-,π0π0 decays 100% into 2 photonsSo as many photons as charged particlesfrom annihilationOn averaged: 37 photons pro annihilationinto quarks at LEPSpectral shape VERY WELL MEASUREDWim de Boer, Karlsruhe Seminar Oxford, May. 3, 2007 4
Example of DM annihilation (SUSY)χχ~fffχχAffχχZffχχχWχ ± χ 0WχZZ≈37gammasDominantχ + χ ⇒A ⇒ b bbar quark pairSum of diagrams should yield=2.10 -26 cm 3 /s to getcorrect relic densityQuark-Fragmentation known!Hence spectra of positrons,gammas and antiprotons known!Relative amount of γ,p,e+ knownas well.Wim de Boer, Karlsruhe Seminar Oxford, May. 3, 2007 5
Page 1 and 2: The dark connection between Canis M
Page 3: Thermal History of WIMPsThermal equ
Page 7 and 8: EGRET on CGRO (Compton Gamma Ray Ob
Page 9 and 10: What about background shape?No SMNo
Page 11 and 12: Basic principle for indirect dark m
Page 13 and 14: Analysis of EGRET data in 6 sky dir
Page 15 and 16: Background scaling factors agree wi
Page 17 and 18: N-body simulations show: Progenitor
Page 19 and 20: Excess of DM from Canis Major +tida
Page 21 and 22: Inner Ring coincides with ring of d
Page 23 and 24: Magnetic fields observed in spiral
Page 25 and 26: What about supersymmetry?Present da
Page 27 and 28: Expected SUSY mass spectra in mSUGR
Page 29 and 30: Direct Detection of WIMPsWIMPs elas
Page 31 and 32: DM annihilation in Sun and EarthSUN
Page 33: Summary on WIMP searchesIndirect de

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