Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-10-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
30 pages, Revtex, plus five figures available from the authors
Scientific paper
Strongly coupled positronium, considered in its pseudoscalar sector, is studied in the framework of relativistic quantum constraint dynamics. Case's method of self-adjoint extension of singular potentials, which avoids explicit introduction of regularization cut-offs, is adopted. It is found that, as the coupling constant \alpha increases, the bound state spectrum undergoes an abrupt change at the critical value \alpha = \alpha_c = 1/2. For \alpha > \alpha_c, the mass spectrum displays, in addition to the existing states for \alpha < \alpha_c, a new set of an infinite number of bound states concentrated in a narrow band starting at mass W=0. In the limit \alpha going to \alpha_c from above, these states shrink to a single massless state with a mass gap with the rest of the spectrum. This state has the required properties to represent a Goldstone boson and to signal a spontaneous breakdown of chiral symmetry. It is suggested that the critical coupling constant \alpha_c be viewed as a possible candidate for an ultra- violet stable fixed point of QED, with a distinction between two phases, joined to each other by a first-order chiral phase transition.
Bawin Michel
Cugnon Joseph
Sazdjian Hagop
No associations
LandOfFree
Strongly coupled positronium in a chiral phase 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 Strongly coupled positronium in a chiral phase, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strongly coupled positronium in a chiral phase will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-64474