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Testing the 130 GeV gamma-ray line with high energy resolution detectors

Author:
Ye Li   Qiang Yuan  


Journal:
Physics Letters B


Issue Date:
2012


Abstract(summary):

Recently some hints of the existence of gamma-ray line around 130 GeV are reported according to the analysis of Fermi-LAT data. If confirmed it would be the first direct evidence to show the existence of new physics beyond the standard model. Here we suggest that using the forthcoming high energy resolution gamma-ray detectors, such as CALET and DAMPE, we may test whether it is real line structure or just the background effect. For DAMPE like detector with designed energy resolution ~1.5%, a line significance will reach 11sigma for the same statistics as Fermi-LAT. For about 1.4 yr survey observation, DAMPE may detect a 5sigma signal of such a gamma-ray line. [All rights reserved Elsevier].


Page:
35---37


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