Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.08865 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915664133881856 |
|---|---|
| author | Jiménez, Jose Beltrán Bettoni, Dario Brax, Philippe Janssen, Bert Sampedro, Pablo |
| author_facet | Jiménez, Jose Beltrán Bettoni, Dario Brax, Philippe Janssen, Bert Sampedro, Pablo |
| contents | We study finite size effects on the linear response of spherically symmetric objects in Born-Infeld (BI) electromagnetism and Dirac-Born-Infeld (DBI) scalar field theories. Previous works show that the linear response coefficients for a point-like source vanish for odd multipoles above the dipole, a feature that resembles the vanishing of Love numbers for black holes. This work goes beyond the point-like idealisation and considers a sphere of finite radius. We find that the vanishing of the linear response coefficients ceases as they acquire a correction due to the finite size of the object. This introduces a hierarchy between the even and odd multipoles of the response coefficients determined by the separation of scales between the radius of the sphere and the screening scale of non-linearities. From a phenomenological viewpoint, the hierarchy between the odd and even multipoles would give access to the screening scale and the object's radius by measuring the behaviour of the potentials at infinity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_08865 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finite size effects in DBI and Born-Infeld for screened spherically symmetric objects Jiménez, Jose Beltrán Bettoni, Dario Brax, Philippe Janssen, Bert Sampedro, Pablo High Energy Physics - Theory General Relativity and Quantum Cosmology We study finite size effects on the linear response of spherically symmetric objects in Born-Infeld (BI) electromagnetism and Dirac-Born-Infeld (DBI) scalar field theories. Previous works show that the linear response coefficients for a point-like source vanish for odd multipoles above the dipole, a feature that resembles the vanishing of Love numbers for black holes. This work goes beyond the point-like idealisation and considers a sphere of finite radius. We find that the vanishing of the linear response coefficients ceases as they acquire a correction due to the finite size of the object. This introduces a hierarchy between the even and odd multipoles of the response coefficients determined by the separation of scales between the radius of the sphere and the screening scale of non-linearities. From a phenomenological viewpoint, the hierarchy between the odd and even multipoles would give access to the screening scale and the object's radius by measuring the behaviour of the potentials at infinity. |
| title | Finite size effects in DBI and Born-Infeld for screened spherically symmetric objects |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2512.08865 |