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Self-field of a moving string — arXiv:2609.15366

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.15366
License (as archived): CC0-1.0
Archived: 2026-10-16T02:44:47.212Z
SHA-256 of the archived text: b889fe4061dbfff044e296bf6362435e366c162c8ccf066c5aa108aaa2d39c46
Stable URL of this page: https://metraipolis.com/documento/dc_45258f142abe

How to cite

Self-field of a moving string — arXiv:2609.15366 — arXiv (en), https://arxiv.org/abs/2609.15366 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_45258f142abe (Metraipolis archive dc_45258f142abe, sha256 b889fe4061dbfff044e296bf6362435e366c162c8ccf066c5aa108aaa2d39c46)

BibTeX

@misc{dc45258f142abe,
  title = {Self-field of a moving string — arXiv:2609.15366},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.15366},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_45258f142abe; sha256 b889fe4061dbfff044e296bf6362435e366c162c8ccf066c5aa108aaa2d39c46},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.15366. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We discuss the effectiveness of the recently proposed quantity $J_{s}$ in suppressing the contribution of a string's self-field to its spectrum, which is used in field theory simulations to track the emission of axions by decaying cosmic strings. We compute the contribution of the self-field to the spectrum of this quantity and to the usually computed spectrum of $\phi\partial_{t}\alpha$ for an infinitely long straight string. Although we demonstrate that the $J_s$ approach is a substantial improvement, we also point out that this highly symmetric model doesn't capture the full contribution of the self-field to the spectrum emitted by strings of a more complex shape, which are typical in network simulations. We then illustrate this point numerically using a simulation of a sinusoidally perturbed straight string. For this simple configuration, we managed to separate the contribution from the self-field and the radiation to the spectrum of $J_{s}$, using the self-field subtraction method. This allows us to show that the spectrum of $J_{s}$ is still dominated by the $n=1$ mode of the string's oscillation, which can be attributed to the self-field and is largely suppressed when the self-field is removed. We also demonstrate that this mode is predominantly sourced by variations along the direction parallel to the string, which is missing in the unconnected segment model, used by arXiv:2512.13653 to claim the effectiveness of $J_{s}$ in suppressing the self-field's contribution to the spectrum.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-15 in astro-ph.CO).
Categorie arXiv: High Energy Physics - Phenomenology (hep-ph) ; Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Theory (hep-th).
Pagina del lavoro: https://arxiv.org/abs/2609.15366 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T02:26:39.008Z dalla pagina https://arxiv.org/catchup/astro-ph.CO/2026-09-15?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).