Cherenkov Telescope Array sensitivity to branon dark matter models
EntityUAM. Departamento de Física Teórica
10.1088/1475-7516/2020/10/041Journal of Cosmology and Astroparticle Physics 2020.10 (2020): 041
Funded byThe work of AAS, VG and MASC was supported by the Spanish Agencia Estatal de Investigación through the grants PGC2018-095161-B-I00 and IFT Centro de Excelencia Severo Ochoa SEV-2016-0597, the Atracción de Talento contract no. 2016-T1/TIC-1542 granted by the Comunidad de Madrid in Spain, and the MultiDark Consolider Network FPA2017- 90566-REDC. DN acknowledges support from the former Spanish Ministry of Economy, Industry, and Competitiveness / European Regional Development Fund grant FPA2015-73913-JIN and the MultiDark Consolider Network FPA2017-90566-REDC
ProjectGobierno de España. PGC2018-095161-B-I00; Gobierno de España. FPA2017-90566-REDC; Gobierno de España. FPA2015-73913-JIN
SubjectsDark matter experiments; Dwarfs galaxies; Gamma ray experiments; Física
NoteThis is the Accepted Manuscript version of an article accepted for publication in Journal of Cosmology and Astroparticle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1475-7516/2020/10/041
Rights® 2020 IOP Publishing Ltd and Sissa Medialab
In the absence of a clear hint of dark matter (DM) signals in the GeV regime so far, heavy, O (TeV) DM candidates are gradually earning more and more attention within the community. Among others, extra-dimensional brane-world models may produce termal DM candidates with masses up to 100 TeV. These heavy DM candidates could be detected with the next generation of very-high-energy gamma-ray observatories such as the Cherenkov Telescope Array (CTA). In this work, we study the sensitivity of CTA to branon DM via the observation of representative astrophysical DM targets, namely dwarf spheroidal galaxies. In particular, we focus on Draco and Sculptor, two well-known dwarfs visible from the Northern and Southern Hemisphere, respectively. For each of these targets, we simulated 300 h of CTA observations and studied the sensitivity of both CTA-North and CTA-South to branon annihilations using the latest publicly available instrument response functions and most recent analysis tools. We computed annihilation cross section values needed to reach a 5σ detection as a function of the branon mass. Additionally, in the absence of a predicted DM signal, we obtained 2σ upper limits on the annihilation cross section. These limits lie 1.5 - 2 orders of magnitude above the thermal relic cross section value, depending on the considered branon mass. Yet, CTA will allow to exclude a significant portion of the brane tension-mass parameter space in the 0.1 - 60 TeV branon mass range, and up to tensions of ~ 10 TeV. More importantly, CTA will significantly enlarge the region already excluded by AMS and CMS, and will provide valuable complementary information to future SKA radio observations. We conclude that CTA will possess potential to constrain brane-world models and, more in general, TeV DM candidates
Google Scholar:Aguirre-Santaella, Alejandra - Gammaldi, Viviana - Sánchez Conde, Miguel Ángel - Nieto, D.
This item appears in the following Collection(s)
Showing items related by title, author, creator and subject.