Abstract
The Lightest Kaluza-Klein particle (LKP), which appears in the Universal Extra Dimension theory (UED), emits gamma-ray directly or secondarily, when it annihilates. The gamma-ray signal from annihilation of LKP will create prominent structure around the LKP mass, and we expect the structure can be observed by using ongoing and near-future space-based detectors with a few percent energy resolution. On the other hand, ground-based detectors, such as HESS, have 15-20% energy resolution, so we could not see a peak structure in the gamma-ray spectrum from LKP annihilation. However, by using HESS observational data, even if the peak structure does not seem to appear in the gamma-ray spectrum, we can set constraints on the boost factor, which determines the density distribution and the annihilation cross section of dark matter in the Galaxy. In addition, we discuss how we can set constraints on the boost factor, when the high accuracy gamma-ray observational data is obtained by space-based detector.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
