Head-on collisions of sphalerons in a deformed phi^6 model can produce a long-lived false-vacuum bubble bounded by a kink-antikink pair that repeatedly collapses and re-expands before decaying into an oscillon.
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False-vacuum bubbles in sphaleron scattering
Head-on collisions of sphalerons in a deformed phi^6 model can produce a long-lived false-vacuum bubble bounded by a kink-antikink pair that repeatedly collapses and re-expands before decaying into an oscillon.