Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-11
Phys.Rev. D56 (1997) 8014-8028
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages revtex, 12 figures
Scientific paper
10.1103/PhysRevD.56.8014
We examine the leading order corrections to the Nambu effective action for the motion of a cosmic string, which appear at fourth order in the ratio of the width to radius of curvature of the string. We determine the numerical coefficients of these extrinsic curvature corrections, and derive the equations of motion of the worldsheet. Using these equations, we calculate the corrections to the motion of a collapsing loop, a travelling wave, and a helical breather. From the numerical coefficients we have calculated, we discuss whether the string motion can be labelled as `rigid' or `antirigid,' and hence whether cusp or kink formation might be suppressed or enhanced.
Anderson Malcolm
Bonjour Filipe
Gregory Ruth
Stewart John
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