The Dirac Sea Contribution To The Energy Of An Electroweak String

Details The Dirac Sea Contribution To The Energy Of An Electroweak String The Dirac Sea Contribution To The Energy Of An Electroweak String

1999-08-19

arxiv.org/abs/hep-ph/9908416v1

Nucl.Phys. B573 (2000) 449-500

Physics

High Energy Physics

High Energy Physics - Phenomenology

57 pages, 11 figures

Scientific paper

10.1016/S0550-3213(99)00831-7

We present a systematic determination of the order hbar fermionic energy shift when an electroweak string is perturbed. We show that the combined effect of zero modes, bound states and continuum states is to lower the total fermionic ground state energy of the string when the Higgs instability of the string is excited. The effect of the Dirac sea is thus to destabilise the string. However, this effect can be offset by populating positive energy states. Fermions enhance the stability of an electroweak string with sufficiently populated fermionic bound states.

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