Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-03-20
Phys.Lett. B492 (2000) 153-160
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, LaTeX, 1 figure; minor rewriting, references corrected, results unchanged
Scientific paper
10.1016/S0370-2693(00)01045-5
It is proposed that the apparent positive acceleration of the cosmological scale factor is due to the vacuum energy of an incomplete chiral phase transition in a hidden SU(2) sector. Constraints from primordial nucleosynthesis imply that the present metastable phase is in a substantially supercooled state. It is argued that massless chiral condensates can substantially enhance the possibility of supercooling, and a linear sigma model exhibiting scale invariance broken only at the quantum level is shown to accommodate the required supercooling with a reasonable choice of quartic couplings. The extensive supercooling can in principle be confirmed or rejected on the basis of interface tension measurements in lattice simulations with dynamical fermions.
No associations
LandOfFree
Proposal for a Constant Cosmological Constant does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Proposal for a Constant Cosmological Constant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proposal for a Constant Cosmological Constant will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-392536