Effects of pair creation on the expansion of vacuum bubbles

Details Effects of pair creation on the expansion of vacuum bubbles Effects of pair creation on the expansion of vacuum bubbles

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983nuphb.221..473a&link_type=abstract

Nuclear Physics B, Volume 221, Issue 2, p. 473-494.

Physics

Nuclear Physics

4

Scientific paper

The real-time behavior of true-vacuum bubbles nucleated in the false-vacuum background is studied in a λϕ4 theory. Classically, the bubble expansion rate has been known to approach the velocity of light asymptotically. A quantum effect, creation of Higgs and fermion pairs, is studied by a semiclassical method, and is shown to lead to a slower expansion rate. Within the thin-wall approximation, several possible asymptotic behaviors are examined. A solution that behaves like the classical one but with different coefficients is shown to be stable. The first-order corrections to the coefficients are calculated approximately. The created Higgs pairs are found to remain inside the bubble and carry an energy of approximately 10-3 λ of the energy released from the false vacuum. The fermions that are massless in the false vacuum go out of the bubble and have energy ~10-3 g2, where g is the Yukawa coupling constant. It is shown that the resulting asymptotic state is Lorentz invariant.

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