IHEP OpenIR  > 理论物理室
Cosmic ray Monte Carlo: A global fitting method in studying the properties of the new sources of cosmic e(+/-) excesses
刘杰(理); Yuan Q(袁强); Bi XJ(毕效军); ;Liu, J; Yuan, Q; Bi, XJ; Li, H; Zhang, XM;; Li H(李虹); Zhang XM(张新民)
2012
发表期刊PHYSICAL REVIEW D
卷号85期号:4页码:43507
摘要Recently, the PAMELA collaboration published the cosmic nuclei and electron spectra with high precision, together with the cosmic antiproton data updated, and the Fermi-LAT collaboration also updated the measurement of the total e(+)e(-) spectrum to lower energies. In this paper we develop a Markov Chain Monte Carlo (MCMC) package CosRayMC, based on the Galactic Propagation (GALPROP) cosmic ray propagation model to study the implications of these new data. It is found that if only the background electrons and secondary positrons are considered, the fit is very bad with chi(2)(red) approximate to 3.39. Taking into account the extra e(+)e(-) sources of pulsars or dark matter annihilation we can give much better fit to these data, with the minimum chi(2)(red) red approximate to 1.04. This means the extra sources are necessary with a very high significance in order to fit the data. However, the data show little difference between pulsar and dark matter scenarios. Both the background and extra source parameters are well constrained with this MCMC method. The antiproton data can further constrain the branching ratio of dark matter annihilation into quarks to be B-q < 0.5% at 2 sigma confidence level. The possible systematical uncertainties of the present study are discussed.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.85.043507
收录类别SCI
WOS记录号WOS:000299944800006
引用统计
被引频次:32[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224546
专题理论物理室
粒子天体物理中心
推荐引用方式
GB/T 7714
Liu J,Yuan Q,Bi XJ,et al. Cosmic ray Monte Carlo: A global fitting method in studying the properties of the new sources of cosmic e(+/-) excesses[J]. PHYSICAL REVIEW D,2012,85(4):43507.
APA 刘杰.,袁强.,毕效军.,;Liu, J.,Yuan, Q.,...&张新民.(2012).Cosmic ray Monte Carlo: A global fitting method in studying the properties of the new sources of cosmic e(+/-) excesses.PHYSICAL REVIEW D,85(4),43507.
MLA 刘杰,et al."Cosmic ray Monte Carlo: A global fitting method in studying the properties of the new sources of cosmic e(+/-) excesses".PHYSICAL REVIEW D 85.4(2012):43507.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
9010.pdf(678KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[刘杰(理)]的文章
[袁强]的文章
[毕效军]的文章
百度学术
百度学术中相似的文章
[刘杰(理)]的文章
[袁强]的文章
[毕效军]的文章
必应学术
必应学术中相似的文章
[刘杰(理)]的文章
[袁强]的文章
[毕效军]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。