Anders BasbÃ¸ll (University og Sussex): SUSY flat directions: To ...

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Statistical and numerical approach Statistical: Choose random couplings. Find minimum of potential. Monte Carlo. Try enough combinations to get a feeling of howmany superfields (and which) get large VEV's Analytical: Impose symmetries. Common couplings: m1/2,m0, A Will the flattest direction win? n=9 is formally flattest.
Conclusion SUSY Flat directions can have crucial influenceon (p)reheating and offer a very nice explanationof the gravitino problem, baryogenesis and evenoffer a ”known” particle as a candidate forinflaton. Preheating serious threat to this. The jury is still out! The potential must be investigated thoroughly!
Page 1 and 2: Anders Basbøll(University og Susse
Page 3 and 4: Minimal SUSY SM (MSSM) table taken
Page 5 and 6: Superpartners not seen Rparity: A
Page 7 and 8: Non renormalisable terms Nonrenor
Page 9 and 10: Evolution during inflation Potentia
Page 11 and 12: Preheating - Kofman, Linde andStaro
Page 13 and 14: The framework Excitations of fields
Page 15 and 16: Particle production changing vac
Page 17 and 18: LLE - only VEV'sCovariant derivativ
Page 19 and 20: Diagonal Goldstones removed defin
Page 21 and 22: esults - LLE and UDD (seperately) U
Page 23 and 24: (QQQ)4LLLE - other fields
Page 25 and 26: 2 Flat directions: UDD+LLE Give VEV
Page 27 and 28: Problems with this picture Directio
Page 29 and 30: Investigation of potential Phase di
Page 31 and 32: More Counting(QQQ)2QU:Max 8(QQQ)*3(
Page 33: Choosing Normalisation All coupling
Page 37 and 38: Extra: Preheating details Quantum f

Anders BasbÃ¸ll (University og Sussex): SUSY flat directions: To ...

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