Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-12-04
Phys.Rev. D68 (2003) 105006
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, accepted for publication in Physical Review D
Scientific paper
10.1103/PhysRevD.68.105006
Recently it was shown that high density QCD supports of number of topological defects. In particular, there are U(1)_Y strings that arise due to K^0 condensation that occurs when the strange quark mass is relatively large. The unique feature of these strings is that they possess a nonzero K^+ condensate that is trapped on the core. In the following we will show that these strings (with nontrivial core structure) can form closed loops with conserved charge and currents trapped on the string worldsheet. The presence of conserved charges allows these topological defects, called vortons, to carry angular momentum, which makes them classically stable objects. We also give arguments demonstrating that vortons carry angular momentum very efficiently (in terms of energy per unit angular momentum) such that they might be the important degrees of freedom in the cores of neutron stars.
Buckley Kirk B. W.
Metlitski Max A.
Zhitnitsky Ariel R.
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