Abstract
We supplement a previous discussion of baryosynthesis in flipped SU(5)×U(1) GUTs by including (1) the large incoherent field energy density which is likely SU(5) is broken, and (2) the possibility of additional Higgs triplet fields suggested by four dimensional string model-building. We consider strong (weak) reheating scenarios in which the Universe is (is not) SU(5) symmetric after inflation. We find an adequate baryon asymmetry subsequent to strong reheating, whatever the number of Higgs triplets (although beware of possible difficulties with quasi-stable relic particles), whereas weak reheating requires at least two Higgs triplets.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 451-456 |
| Number of pages | 6 |
| Journal | Physics Letters B |
| Volume | 207 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jun 30 1988 |
Bibliographical note
Funding Information:Young Investigator Award and m part by DOE No DE-AC02-83ER-40 105
Funding Information:
We would like to thank L Connors, A Deans and R Parker for valuable discussions One of us (J E ) thanks the Lawrence Berkeley Laboratory for its kmd hospitality while this work was completed The work of DVN was supported m part by DOE Grant No DE-AC02-76ER0081 and m part by the University of Wlsconsm ResearchC ommittee with funds granted by the Wisconsin Alumni ResearchF oundation The work of KAO was supportedm part by a Presidential