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21
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84927471753
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Holman, Ramond, and Ross (Ref. [9]).
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27
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84927468549
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If phi couples to a gauge field with strength g, radiative corrections due to gauge-boson loops lead to B app g4, making B >> 10-14 unless g
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29
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84927503104
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This potential has its global minimum at σ = ( 5 V0/ α )1/4, where β = 4 α / 5 sigma and density perturbations of the appropriate amplitude imply α = 3 times 10-13. Such a nonrenormalizable potential could arise in the effective Lagrangian at low energies.
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32
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84927484448
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Shafi and Vilenkin (Ref. [9]);
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33
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84927480432
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Pi (Ref. [9]).
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34
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84927473302
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The end of the slow-roll epoch occurs when | V prime prime | approx 9 H2; for our model, φe/ σ apeq [ π / | ln ( φ2/ σ2) | ]1/2( σ / mPl) apeq 10-13.
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35
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84927507730
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Astrophys. J. (to be published).
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Gelb, J.1
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43
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84927461279
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There are possibilities for improving the reheating efficiency. The strict constraint to the coupling of the field into which the phi decays can be circumvented if there are two contributions to its mass, of opposite sign, so that its coupling to the phi can exceed this bound. Further, the highest temperature reached after inflation occurs just when the phi particles begin to decay, Tmaxapeq ( TRHscrM )1/2. However, as the temperature falls from Tmax to TRH the entropy per comoving volume increases by ( Tmax/ TRH)5. In spite of the entropy production it may be possible to take advantage of this fact.
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44
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84927471810
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All models of inflation that employ a symmetry-breaking potential require a small initial value for phi;
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46
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84927482167
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It has been shown that models of inflation like ours are eternal;
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47
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84927488822
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i.e., once the Universe becomes vacuum dominated anywhere, due to the role of quantum fluctuations most of the physical volume of the Universe will forever be inflating;
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49
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84927497435
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or Linde, Particle Physics and Inflationary Cosmology (Ref. [3]). Viewed in this context, the small initial value required for phi is irrelevant.
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50
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84927476031
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In this regard we have followed the models of Shafi and Vilenkin [9] and Pi [9] where the VEV of the phi was used to induce GUT symmetry breaking.
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