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Primordial Black Holes and Cosmological Phase Transitions Report ...

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PBHs <strong>and</strong> <strong>Cosmological</strong> <strong>Phase</strong> <strong>Transitions</strong> v<br />

5.3.2 Lattice Fit . . . . . . . . . . . . . . . . . . . . . . . . . . 114<br />

5.3.3 Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . 116<br />

5.4 Fluctuations during the EW phase transition . . . . . . . . . . . 117<br />

5.4.1 Crossover (SMPP) . . . . . . . . . . . . . . . . . . . . . . 117<br />

5.4.2 Bag Model (MSSM) . . . . . . . . . . . . . . . . . . . . . 117<br />

5.5 Fluctuations during the e + e − annihilation . . . . . . . . . . . . . 119<br />

6 PBH formation 120<br />

6.1 The condition for PBH formation . . . . . . . . . . . . . . . . . . 120<br />

6.2 The mechanism of PBH formation . . . . . . . . . . . . . . . . . 121<br />

7 The threshold δc during the QCD epoch 124<br />

7.1 Bag Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124<br />

7.1.1 Before the mixed phase . . . . . . . . . . . . . . . . . . . 124<br />

7.1.2 During the mixed phase . . . . . . . . . . . . . . . . . . . 129<br />

7.1.3 After the mixed phase . . . . . . . . . . . . . . . . . . . . 133<br />

7.1.4 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 140<br />

7.2 Crossover Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 140<br />

7.2.1 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 143<br />

7.2.2 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 144<br />

7.3 Lattice Fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144<br />

7.3.1 Before the mixed phase . . . . . . . . . . . . . . . . . . . 150<br />

7.3.2 During the mixed phase . . . . . . . . . . . . . . . . . . . 152<br />

7.3.3 After the mixed phase . . . . . . . . . . . . . . . . . . . . 152<br />

7.3.4 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 156<br />

8 The threshold δc for PBH formation during the EW phase<br />

transition 159<br />

8.1 Crossover Model (SMPP) . . . . . . . . . . . . . . . . . . . . . . 159<br />

8.1.1 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 159<br />

8.1.2 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 160<br />

8.2 Bag Model (MSSM) . . . . . . . . . . . . . . . . . . . . . . . . . 160<br />

9 The threshold δc for PBH formation during the cosmological<br />

e + e − annihilation 167<br />

9.1 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167<br />

10 Running–tilt power–law spectrum 170<br />

11 The fraction of the Universe going into PBHs 174<br />

11.1 Radiation–dominated universe . . . . . . . . . . . . . . . . . . . . 176<br />

11.2 EW Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178<br />

11.3 Electron–positron annihilation . . . . . . . . . . . . . . . . . . . 183<br />

11.4 QCD phase transition . . . . . . . . . . . . . . . . . . . . . . . . 185<br />

11.5 EW phase transition (MSSM) . . . . . . . . . . . . . . . . . . . . 192<br />

11.6 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

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