Colloquium by Jonathan Feng - Fermilab Center for Particle ...

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SUPERWIMPS Feng, Rajaraman, Takayama (2003); Bi, Li, Zhang (2003); Ellis, Olive, Santoso, Spanos (2003); Wang, Yang (2004); Feng, Su, Takayama (2004); Buchmuller, Hamaguchi, Ratz, Yanagida (2004); … • Suppose the WIMP can decay into a superweakly-interacting particle (superWIMP): WIMP SM particles SuperWIMP • This is not completely contrived: it happens about ½ the time in simple SUSY, where the gravitino plays the role of the superWIMP: WIMP (mass + charge) superWIMP (mass) + SM particles (charge) 23 Mar 11 Feng 30
FREEZE OUT WITH SUPERWIMPS WIMPs freeze out as usual… …but then decay to superWIMPs M Pl 2 /MW 3 ~ 10 3 -10 6 s SuperWIMPs naturally inherit the right density; share all the motivations of WIMPs, but are much more weakly interacting 23 Mar 11 Feng 31
Page 1 and 2: WIMP PARADIGM: CURRENT STATUS FNAL
Page 3 and 4: THE COSMIC CONNECTION, c. 1977 “O
Page 5 and 6: DARK MATTER Known DM properties •
Page 7 and 8: 23 Mar 11 THE WEAK MASS SCALE • F
Page 9 and 10: 23 Mar 11 THE WIMP MIRACLE 10-3 σ0
Page 11 and 12: LEP’S COSMOLOGICAL LEGACY Gauge H
Page 13 and 14: INDIRECT DETECTION Dark Matter anni
Page 15 and 16: ARE THESE DARK MATTER? • Energy s
Page 17 and 18: DIRECT DETECTION • Can look for n
Page 19 and 20: LOWER LIMIT ON DIRECT DETECTION •
Page 21 and 22: LOW MASS FRONTIER Collision rate sh
Page 23 and 24: SPIN-DEPENDENT SCATTERING 23 Mar 11
Page 25 and 26: CURRENT BOUNDS FOR SUSY Yellow: pre
Page 27 and 28: 23 Mar 11 THE SIGNIFICANCE OF 10 -4
Page 29: BEYOND WIMPS • Does the WIMP para
Page 33 and 34: WARM SUPERWIMPS • SuperWIMPs are
Page 35 and 36: • In SUSY, however, there may be
Page 37: CONCLUSIONS • Particle Dark Matte

Colloquium by Jonathan Feng - Fermilab Center for Particle ...

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