Line emission search from DM annihilation in the Galactic Center with LST-1
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73635224" target="_blank" >RIV/61989592:15310/25:73635224 - isvavai.cz</a>
Result on the web
<a href="https://pos.sissa.it/501/462/pdf" target="_blank" >https://pos.sissa.it/501/462/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.501.0462" target="_blank" >10.22323/1.501.0462</a>
Alternative languages
Result language
angličtina
Original language name
Line emission search from DM annihilation in the Galactic Center with LST-1
Original language description
Dark Matter (DM) remains a great mystery in modern physics. Among various candidates, the weakly interacting massive particles (WIMPs) scenario stands out and is under extensive study. The detection of the hypothetical gamma-ray emission from WIMP annihilation could act as a direct probe of electroweak-scale interactions, complementing DM collider searches and other direct DM detection techniques. At very high energies (VHE), WIMP self-annihilation is expected to produce gamma rays together with other Standard Model particles. The Galactic Center (GC), due to its relative proximity to the Earth and its high expected DM density, is a prime target for monoenergetic line searches. Imaging Atmospheric Cherenkov Telescopes (IACTs) have placed strong constraints on the DM properties at the GC, with the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) providing the most stringent limits from 20 TeV to 100 TeV exploiting Large Zenith Angle (LZA) observations. However, the limited field of view (FoV) of the MAGIC telescopes (< 3.5°) prevented a detailed study of the extended region around the GC in which an enhanced DM density is expected.The first Large-Sized Telescope (LST-1) of the Cherenkov Telescope Array Observatory (CTAO), located at the Roque de Los Muchachos Observatory (La Palma, Spain) close to the MAGIC site, has been observing the GC since 2021. With its wide FoV of 4.5°, LST-1 could contribute significantlyto the WIMPs search at the GC. The observations are performed at LZA (ZA > 58°), which, while required due to the source’s low altitude, also optimizes the detection of gamma rays up to 100 TeV and beyond. We present a study of the systematic uncertainties in WIMP line emission searches with LST-1. Our work examines the instrument response functions for LZA observations, background rejection in monoscopic mode, and includes updated results from simulations, highlighting new methods for spectral line searches.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
P o S - Proceedings of Science
ISBN
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ISSN
1824-8039
e-ISSN
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Number of pages
8
Pages from-to
"462-1"-"462-8"
Publisher name
Scuola Internazionale Superiore di Studi Avanzati
Place of publication
Trieste
Event location
Ženeva
Event date
Jul 15, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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