Y-junction intercommutations of current carrying strings

D. A. Steer, Marc Lilley, Daisuke Yamauchi, and Takashi Hiramatsu
Phys. Rev. D 97, 023507 – Published 10 January 2018

Abstract

Under certain conditions the collision and intercommutation of two cosmic strings can result in the formation of a third string, with the three strings then remaining connected at Y-junctions. The kinematics and dynamics of collisions of this type have been the subject of analytical and numerical analyses in the special case in which the strings are Nambu-Goto. Cosmic strings, however, may well carry currents, in which case their dynamics is not given by the Nambu-Goto action. Our aim is to extend the kinematic analysis to more general kinds of string model. We focus in particular on the collision of strings described by conservative elastic string models, characteristic of current carrying strings, and which are expected to form in a cosmological context. As opposed to Nambu-Goto strings collisions, we show that in this case the collision cannot lead to the formation of a third elastic string: if dynamically such a string forms then the joining string must be described by a more general equation of state. This process will be studied numerically in a forthcoming publication.

  • Figure
  • Figure
  • Received 26 October 2017

DOI:https://doi.org/10.1103/PhysRevD.97.023507

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

D. A. Steer1,*, Marc Lilley2,†, Daisuke Yamauchi3,‡, and Takashi Hiramatsu4,§

  • 1AstroParticule and Cosmologie, UMR 7164-CNRS, Université Denis Diderot-Paris 7, CEA, Observatoire de Paris, 10 rue Alice Domon et Léonie Duquet, F-75205 Paris Cedex 13, France
  • 2𝒢ℝϵℂ𝒪, Institut d’Astrophysique de Paris, CNRS, UMR 7095, et Sorbonne Universités, UPMC Univ Paris 6, 98bis boulevard Arago, F-75014 Paris, France
  • 3Faculty of Engineering, Kanagawa University, Kanagawa 221-8686, Japan
  • 4Department of Physics, Rikkyo University, Tokyo 171-8501, Japan

  • *steer@apc.univ-paris7.fr
  • lilley@iap.fr
  • yamauchi@jindai.jp
  • §hiramatz@yukawa.kyoto-u.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 97, Iss. 2 — 15 January 2018

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×