Presentation is loading. Please wait.

Presentation is loading. Please wait.

Particle Physics and Cosmology

Similar presentations


Presentation on theme: "Particle Physics and Cosmology"— Presentation transcript:

1 Particle Physics and Cosmology
Phase transitions

2 baryogenesis during electroweak phase transition ?

3 Sakharov’s conditions for baryogenesis during electroweak phase transition
baryon number violation interactions ☺ charge conjugation violating interactions ☺ CP – violating interactions ☺ non – equilibrium process ☺

4 baryogenesis during electroweak phase transition ?
strongly first order electroweak phase transition can generate baryon asymmetry if CP violation is sufficiently strong no efficient baryogenesis for weak first order phase transition, second order phase transition or crossover presumably too little CP violation in SM ( not definitely settled )

5 electroweak phase transition

6

7

8

9

10

11

12

13 order of phase transition

14

15

16

17 temperature dependent effective potential
high temperature expansion

18 next to leading order in high temperature expansion

19

20 first order cosmological phase transitions

21 chaos in the Universe

22

23

24

25 relics from cosmological first order phase transitions ?

26 electroweak crossover

27 critical mass of the Higgs scalar for the onset of crossover

28 electroweak “phase transition “ in standard model is crossover !
perhaps strong first order transition in supersymmetric extensions of standard model

29 standard model of particle physics and cosmology
no candidate for dark matter no baryon asymmetry no massive neutrinos

30 standard model of particle physics and cosmology
prediction : present Universe consists of photons and massless neutrinos

31

32

33

34

35

36

37

38


Download ppt "Particle Physics and Cosmology"

Similar presentations


Ads by Google