6533b854fe1ef96bd12adfe9
RESEARCH PRODUCT
Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission
Fengtao ZhangY. F. WangY. Y. HuangXiangpeng GuoXiangpeng GuoJinfei WuJinfei WuD. DrozJ. N. RaoJinglai DuanYang HaiboC. LiuD. M. WeiD. M. WeiZongye ZhangX. Y. MaP. AzzarelloP. FuscoP. FuscoZ. Y. SunNiu XiaoyangI. De MitriW. ZhangCihang LuoCihang LuoC. Q. FengYu Xing CuiYu Xing CuiX. X. LiM. S. CaiM. S. CaiZ.-q. ShenG. MarsellaG. MarsellaX. L. WangS. WangS. WangF. LoparcoF. LoparcoGuan Wen YuanGuan Wen YuanY. F. WeiJin ChangJin ChangY. J. ZhangGiacinto DonvitoW. X. PengJ. L. ChenQ. AnS. B. LiuS. C. WenF. GarganoXiulian PanXiulian PanY. Z. GongCang ZhaoYuqing FanYuqing FanT. S. CuiH. T. XuA. De BenedittisA. De BenedittisE. CatanzaniM. M. SalinasY. H. YuZhao-min WangYun Long ZhangAndrii TykhonovWei LiuDingsong WuZhenyu ZhangYifan YangG. F. XueFang FangPengtao YangM. Di SantoM. Di SantoR. QiaoYaohui ZhangXian Qiang LiX. J. BiChuan YueMin GaoZ. Q. XiaShumei WuX. Y. PengM. M. MaWenhan JiangWenhan JiangJ. Z. WangF. C. T. BarbatoM. StolpovskiyHengchang LiuF. AlemannoP. BernardiniP. BernardiniJ. J. WeiLihui WuYujuan LiuJ. LiuYao Ming LiangZ. XuA. ParentiL. FengYun-zhi ZhangA. RuinaD. MoM. Y. CuiXin WuL. SilveriJun-jun GuoJun-jun GuoYu-sa WangHong Yun ZhaoW. LiHu-rong YaoJinyuo SongZ. Z. XuZ. X. DongYan Fang WangKun FangY. ZhangA. D'amoneA. D'amoneH. SuMeng SuA. KotenkoMaria IonicaJie KongShi-jun LeiSheng Xia ZhangQ. YuanQ. YuanGuangshun HuangR. R. FanPeng-xiong MaXun Feng ZhaoZhi Hui XuZhi Hui XuS.x. LiA. SurdoYu-xuan ZhuX. J. TengTie-kuang DongW. H. ShenZ. T. ShenD. D'ursoZu-cheng ChenZu-cheng ChenL. G. WangDong Ya GuoXiaoyuan HuangXiaoyuan HuangY. M. HuF. De PalmaF. De PalmaHao Ting DaiC. PerrinaTianxiao MaDonghong ChenKai-kai DuanMaksym DeliyergiyevD. KyratzisK. GongChengrui ZhouMn MazziottaG. Z. ShangShuang Xue HanJ. J. ZangHuaguang Wangsubject
Astrophysics::High Energy Astrophysical PhenomenaDark matterGeneral Physics and Astronomychemistry.chemical_elementFOS: Physical sciencesCosmic raySpace (mathematics)01 natural sciences7. Clean energyCosmic ray heliumHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)0103 physical sciencesEnergy spectrumcosmic rays dark matter spacecrystals010306 general physicsHeliumPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)COSMIC cancer databasedetectorSettore FIS/01 - Fisica SperimentalecalibrationchemistryParticleAstrophysics - High Energy Astrophysical PhenomenaNucleonperformancedescription
The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the DArk Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of $4.3\sigma$. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-05-18 |