https://doi.org/10.1140/epjc/s10052-024-13239-x
Regular Article - Theoretical Physics
Bounds on ultralight bosons from the Event Horizon Telescope observation of Sgr A
1
Centre for High Energy Physics, Indian Institute of Science, C. V. Raman Avenue, 560012, Bengaluru, India
2
Department of Physics, Indian Institute of Science, C. V. Raman Avenue, 560012, Bengaluru, India
c
tarak.maity.physics@gmail.com
Received:
14
March
2024
Accepted:
13
August
2024
Published online:
5
September
2024
Recent observation of Sagittarius A (Sgr A) by the Event Horizon Telescope (EHT) collaboration has uncovered various unanswered questions in black hole (BH) physics. Besides, it may also probe various beyond the Standard Model (BSM) scenarios. One of the most profound possibilities is the search for ultralight bosons (ULBs) using BH superradiance (SR). EHT observations imply that Sgr A has a non-zero spin. Using this observation, we derive bounds on the mass of ULBs with purely gravitational interactions. Considering self-interacting ultralight axions, we constrain new regions in the parameter space of decay constant, for a certain spin of Sgr A. Future observations of various spinning BHs can improve the present constraints on ULBs.
© The Author(s) 2024
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3.
