Journal
PHYSICS LETTERS B
Volume 814, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2021.136075
Keywords
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Funding
- INFN grant 'LINDARK'
- research grant 'The Dark Universe: A Synergic Multimessenger Approach' - MIUR [2017X7X85K]
- project Theoretical Astroparticle Physics (TAsP) - INFN
- 'Departments of Excellence 2018-2022' grant - Italian Ministry of Education, University and Research (miur) [L. 232/2016]
- MIUR [20179P3PKJ]
- ASI-INAF [2017-14-H.0]
- Fundacao para a Ciencia e a Tecnologia (FCT) [UID/FIS/04434/2019, UIDB/04434/2020, UIDP/04434/2020]
- FCT [IF/01654/2014/CP1215/CT0003]
- Netherlands Organisation for Scientific Research (NWO) through a TOP Grant Module 1 [614.001.652]
- ESO Telescopes at the La Silla Paranal Observatory [0100.D-0807, 0101.D0300, 0102.D-0372, 0103.D-0705]
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By using MUSE spectroscopic observations of the dwarf spheroidal galaxy Leo T, radiative decays of axion-like particles (ALPs) were searched for, resulting in constraints on the effective ALP-two-photon coupling in the mass range 2.7-5.3 eV. The study improves existing limits by more than one order of magnitude within this mass range.
We use MUSE spectroscopic observations of the dwarf spheroidal galaxy Leo T between 470 and 935 nm to search for radiative decays of axion like particles (ALPs). Under the assumption that ALPs constitute the dark matter component of the Leo T halo, we derive bounds on the effective ALP-two-photon coupling. We improve existing limits by more than one order of magnitude in the ALP mass range 2.7-5.3 eV. (C) 2021 The Author(s). Published by Elsevier B.V.
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