典型文献
Search for gamma-ray spectral lines with the DArk Matter Particle Explorer
文献摘要：
The DArk Matter Particle Explorer(DAMPE)is well suitable for searching for monochromatic and sharp γ-ray structures in the GeV-TeV range thanks to its unprecedented high energy resolution.In this work,we search for y-ray line structures using five years of DAMPE data.To improve the sensitivity,we develop two types of dedicated data sets(including the BgoOnly data which is the first time to be used in the data analysis for the calorimeter-based gamma-ray observatories)and adopt the signal-to-noise ratio opti-mized regions of interest(ROIs)for different DM density profiles.No line signals or candidates are found between 10 and 300 GeV in the Galaxy.The constraints on the velocity-averaged cross section for xx→γγ and the decay lifetime for x →γv,both at 95％confidence level,have been calculated and the systematic uncertainties have been taken into account.Comparing to the previous Fermi-LAT results,though DAMPE has an acceptance smaller by a factor of～10,similar constraints on the DM parameters are achieved and below 100 GeV the lower limits on the decay lifetime are even stronger by a factor of a few.Our results demonstrate the potential of high-energy-resolution observations on dark matter detection.
文献关键词：
中图分类号：
作者姓名：
DAMPE Collaboration;Yun-Feng Liang
作者机构：
Laboratory for Relativistic Astrophysics,Department of Physics,Guangxi University,Nanning 530004,China
文献出处：
引用格式：
[1]DAMPE Collaboration;Yun-Feng Liang-.Search for gamma-ray spectral lines with the DArk Matter Particle Explorer)[J].科学通报（英文版）,2022(07):679-684
A类：
BgoOnly,observatories
B类：
Search,gamma,ray,spectral,lines,DArk,Matter,Particle,Explorer,DAMPE,well,suitable,searching,monochromatic,sharp,structures,GeV,TeV,range,thanks,unprecedented,high,energy,resolution,In,this,work,using,five,years,data,To,improve,sensitivity,develop,two,types,dedicated,sets,including,which,first,used,analysis,calorimeter,adopt,noise,ratio,opti,mized,regions,interest,ROIs,different,DM,density,profiles,No,signals,candidates,are,found,between,Galaxy,constraints,velocity,averaged,cross,section,xx,decay,lifetime,both,confidence,level,have,been,calculated,systematic,uncertainties,taken,into,account,Comparing,previous,Fermi,LAT,results,though,has,acceptance,smaller,by,similar,parameters,achieved,below,lower,limits,even,stronger,few,Our,demonstrate,potential,observations,dark,matter,detection
AB值：
0.608815
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